diff --git a/AGENTS.md b/AGENTS.md
index 72da480..6d322fb 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -44,6 +44,14 @@ Engineering rules / обязательные практики:
 - Не инлайнить сложный UI повторно. Выносить компонент, если структура повторяется или секция имеет отдельную ответственность.
 - Если реализация по задаче конфликтует с этими правилами, остановиться и явно сообщить blocker вместо поставки плохой структуры.
 
+Язык интерфейса:
+- Текста, который видит человек, в коде не бывает. Строка живёт в словаре и подставляется через `t(...)`: во фронтенде это `src/i18n` приложения (`packages/ui` — свой словарь), на бэкенде `chatballs/i18n`. Русский каталог — источник ключей, английский обязан его повторить: пропущенный перевод во фронтенде ловит `tsc`, на бэкенде — тест каталога.
+- Ключ пишется от смысла, а не от фразы: `settings.storage_bucket_name`, а не пересказ текста. Строку переформулируют чаще, чем переименовывают.
+- Число не склоняют вручную: формы задаёт словарь, форму выбирает `tn(...)`. Дату, размер файла и разряды числа форматирует `fmt` — прибитые `"ru-RU"` и свои списки месяцев запрещены.
+- Что записано в базу, переводится по коду, а не текстом: системные события диалога, уведомления и подписи журнала аудита хранят код, а фразу собирает бэкенд на языке читателя. Писать в историю готовую русскую фразу нельзя — её потом не перевести.
+- Язык запроса выбирается цепочкой: профиль сотрудника → организация → установка → браузер. Письмо получает язык адресата, а не отправителя.
+- На бэкенде `t(...)` не вызывается на уровне модуля: язык там свой на каждый запрос, а константа посчиталась бы один раз при импорте.
+
 Definition of Done:
 - Запускать только тесты, относящиеся к изменениям текущей итерации. Полный прогон всех тестов выполнять только по явному указанию владельца.
 - Измененные файлы должны быть проверены на NO GOD violations.
diff --git a/apps/backend/chatballs/ai/agent_card.py b/apps/backend/chatballs/ai/agent_card.py
index 3497699..35f37dd 100644
--- a/apps/backend/chatballs/ai/agent_card.py
+++ b/apps/backend/chatballs/ai/agent_card.py
@@ -22,6 +22,7 @@ from chatballs.channels.services import (
     update_channel,
 )
 from chatballs.conversations.models import LifecycleState
+from chatballs.i18n import t
 from chatballs.tenancy.context import TenantContext
 
 
@@ -170,7 +171,7 @@ def _unique_agent_code(organization_id: int, name: str) -> str:
         candidate = f"{base}-{suffix}"
         if candidate not in taken:
             return candidate
-    raise ValidationError({"name": "Не удалось подобрать уникальный код агента"})
+    raise ValidationError({"name": t("ai.agent_code_collision")})
 
 
 def ensure_channel_agent(channel: Channel) -> AIAgent:
diff --git a/apps/backend/chatballs/ai/agent_card_views.py b/apps/backend/chatballs/ai/agent_card_views.py
index 94a54f2..e5ba1bf 100644
--- a/apps/backend/chatballs/ai/agent_card_views.py
+++ b/apps/backend/chatballs/ai/agent_card_views.py
@@ -24,9 +24,14 @@ from chatballs.channels import services as channel_services
 from chatballs.channels.models import Channel
 from chatballs.channels.runtime import run_channel_turn
 from chatballs.channels.selectors import channel_for_context
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 
-AGENT_NOT_FOUND = {"detail": "Агент не найден"}
+
+# Функция, а не константа: язык у каждого запроса свой, а константа собралась бы
+# один раз при импорте — на языке, который случайно стоял в тот момент.
+def agent_not_found() -> dict[str, str]:
+    return {"detail": t("ai.agent_not_found")}
 
 
 def _validation_detail(error: ValidationError) -> str:
@@ -157,7 +162,7 @@ class AgentCardDetailView(APIView):
         try:
             channel = _load(request, agent_id)
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         from chatballs.ai.agent_card import ensure_channel_agent
 
         ensure_channel_agent(channel)
@@ -167,7 +172,7 @@ class AgentCardDetailView(APIView):
         try:
             channel = _load(request, agent_id)
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         body = request.data if isinstance(request.data, dict) else {}
         try:
             channel = update_agent_card(
@@ -182,7 +187,7 @@ class AgentCardDetailView(APIView):
         try:
             channel = _load(request, agent_id)
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         name = channel.name
         try:
             delete_agent_card(context=request.tenant_context, channel=channel)
@@ -201,7 +206,7 @@ class _AgentCardStatusView(APIView):
         try:
             channel = _load(request, agent_id)
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         try:
             channel = set_agent_card_active(
                 context=request.tenant_context,
@@ -234,10 +239,10 @@ class AgentCardTestChatView(APIView):
                 capability="ai.view",
             )
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         message = str(request.data.get("message", "")).strip()
         if not message:
-            return Response({"detail": "Пустое сообщение"}, status=400)
+            return Response({"detail": t("ai.empty_message")}, status=400)
         history = request.data.get("history") or []
         if not isinstance(history, list):
             return Response({"detail": "history must be a list"}, status=400)
@@ -263,7 +268,7 @@ class AgentCardConnectionsView(APIView):
         try:
             channel = _load(request, agent_id)
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         data = request.data if isinstance(request.data, dict) else {}
         integration_id = data.get("integrationId")
         if isinstance(integration_id, bool) or not isinstance(integration_id, int):
@@ -305,7 +310,7 @@ class AgentCardConnectionDetailView(APIView):
         try:
             channel = _load(request, agent_id)
         except Channel.DoesNotExist:
-            return Response(AGENT_NOT_FOUND, status=404)
+            return Response(agent_not_found(), status=404)
         try:
             channel_services.unbind_connection(
                 context=request.tenant_context,
diff --git a/apps/backend/chatballs/ai/provider/demo.py b/apps/backend/chatballs/ai/provider/demo.py
index 648207c..7d2e7fa 100644
--- a/apps/backend/chatballs/ai/provider/demo.py
+++ b/apps/backend/chatballs/ai/provider/demo.py
@@ -22,6 +22,7 @@ from chatballs.ai.provider.base import (
     LLMProvider,
     ProviderError,
 )
+from chatballs.i18n import t
 
 EMBEDDING_DIM = 16
 KNOWLEDGE_MARKER = "Отвечай только на основе этих знаний:"
@@ -131,4 +132,4 @@ class DemoProvider(LLMProvider):
         ]
 
     def transcribe(self, *, audio: bytes, filename: str, content_type: str, model: str) -> str:
-        raise ProviderError("Расшифровка голосовых недоступна в демо-провайдере: подключите OpenRouter или совместимый провайдер в «Настройках».")
+        raise ProviderError(t("ai.demo_no_transcription"))
diff --git a/apps/backend/chatballs/ai/provider/factory.py b/apps/backend/chatballs/ai/provider/factory.py
index d470381..71b07f6 100644
--- a/apps/backend/chatballs/ai/provider/factory.py
+++ b/apps/backend/chatballs/ai/provider/factory.py
@@ -4,6 +4,7 @@ from django.core.exceptions import ImproperlyConfigured
 from chatballs.ai.provider import routing
 from chatballs.ai.provider.base import LLMProvider, ProviderError
 from chatballs.ai.provider.local import LocalProvider
+from chatballs.i18n import t
 
 
 def _test_provider() -> LLMProvider:
@@ -26,6 +27,6 @@ def get_provider(*, channel=None) -> LLMProvider:
 
     if channel is None:
         raise ProviderError(
-            "AI-провайдер не настроен: вызов без канала не может выбрать интеграцию"
+            t("ai.provider_not_configured")
         )
     return routing.resolve_provider(channel)
diff --git a/apps/backend/chatballs/ai/provider/openrouter.py b/apps/backend/chatballs/ai/provider/openrouter.py
index 3343777..7b5852f 100644
--- a/apps/backend/chatballs/ai/provider/openrouter.py
+++ b/apps/backend/chatballs/ai/provider/openrouter.py
@@ -1,5 +1,6 @@
 from chatballs.ai.provider import openai_http
 from chatballs.ai.provider.base import ChatMessage, ChatResult, EmbeddingResult, LLMProvider
+from chatballs.i18n import t
 
 
 class OpenRouterProvider(LLMProvider):
@@ -70,5 +71,5 @@ class OpenRouterProvider(LLMProvider):
             raise ProviderError(f"Расшифровка не удалась: {error}") from error
         text = str(payload.get("text") or "").strip()
         if not text:
-            raise ProviderError("Провайдер вернул пустую расшифровку")
+            raise ProviderError(t("ai.empty_transcript"))
         return text
diff --git a/apps/backend/chatballs/ai/services.py b/apps/backend/chatballs/ai/services.py
index e0a0e1c..d0b3b48 100644
--- a/apps/backend/chatballs/ai/services.py
+++ b/apps/backend/chatballs/ai/services.py
@@ -11,6 +11,7 @@ from chatballs.ai.models import (
 )
 from chatballs.ai.provider_selection import configure_agent_provider
 from chatballs.channels.models import Channel
+from chatballs.i18n import t
 from chatballs.tenancy.context import TenantContext
 
 
@@ -183,7 +184,7 @@ def set_agent_active(*, context: TenantContext, agent: AIAgent, is_active: bool)
         raise ValidationError({"agent": "Archived AI agent cannot change state"})
     if is_active and locked.provider_integration_id is None:
         raise ValidationError(
-            {"providerIntegrationId": "Для запуска AI выберите провайдера организации"}
+            {"providerIntegrationId": t("ai.pick_provider_first")}
         )
     locked.status = target_status
     locked.lifecycle_version += 1
diff --git a/apps/backend/chatballs/api/pagination.py b/apps/backend/chatballs/api/pagination.py
index d40b4ef..9080643 100644
--- a/apps/backend/chatballs/api/pagination.py
+++ b/apps/backend/chatballs/api/pagination.py
@@ -25,6 +25,8 @@ from typing import Any
 from django.db.models import Q, QuerySet
 from rest_framework.exceptions import ValidationError
 
+from chatballs.i18n import t
+
 DEFAULT_PAGE_SIZE = 20
 MAX_PAGE_SIZE = 100
 DEFAULT_WINDOW_SIZE = 50
@@ -192,7 +194,7 @@ def window(
     выпадать из ленты или повторяться на границе окна.
     """
     if not keys:
-        raise ValueError("окно требует хотя бы один ключ сортировки")
+        raise ValueError(t("api.window_needs_sort_key"))
     ordered = queryset.order_by(*[key.ordering for key in keys])
     if after is not None:
         condition = _after_cursor(ordered, keys, after)
diff --git a/apps/backend/chatballs/calls/lifecycle.py b/apps/backend/chatballs/calls/lifecycle.py
index 8c06170..e71f706 100644
--- a/apps/backend/chatballs/calls/lifecycle.py
+++ b/apps/backend/chatballs/calls/lifecycle.py
@@ -11,7 +11,8 @@ from chatballs.calls.models import (
     CallStatus,
     ParticipantSide,
 )
-from chatballs.conversations.models import Message, MessageAuthor
+from chatballs.conversations.models import Message, MessageAuthor, SystemEvent
+from chatballs.i18n import t
 
 ALLOWED_TRANSITIONS = {
     CallStatus.REQUESTED: {
@@ -39,6 +40,29 @@ def _format_duration(seconds: int) -> str:
     return f"{seconds // 60:02d}:{seconds % 60:02d}"
 
 
+# Код события и его параметры: интерфейс собирает фразу на языке читателя, а
+# текст остаётся в базе запасным вариантом и читаемой записью.
+_TIMELINE_EVENTS: dict[str, str] = {
+    CallStatus.ACCEPTED: SystemEvent.CALL_ACCEPTED,
+    CallStatus.DECLINED: SystemEvent.CALL_DECLINED,
+    CallStatus.CANCELLED: SystemEvent.CALL_CANCELLED,
+    CallStatus.MISSED: SystemEvent.CALL_MISSED,
+    CallStatus.EXPIRED: SystemEvent.CALL_EXPIRED,
+    CallStatus.ACTIVE: SystemEvent.CALL_STARTED,
+    CallStatus.ENDED: SystemEvent.CALL_ENDED,
+    CallStatus.FAILED: SystemEvent.CALL_FAILED,
+}
+
+
+def _timeline_event(call: CallSession, target_status: str) -> tuple[str, dict]:
+    """Код события и параметры для строки таймлайна."""
+
+    code = _TIMELINE_EVENTS.get(target_status, "")
+    if code == SystemEvent.CALL_ENDED and call.duration_seconds is not None:
+        return code, {"duration": _format_duration(call.duration_seconds)}
+    return code, {}
+
+
 def _timeline_text(call: CallSession, target_status: str) -> str | None:
     # Системные события звонка в timeline диалога (SPEC-CHATBALLS-0013 §13).
     # Вызывается только при фактической смене статуса — retry дублей не даёт.
@@ -76,7 +100,9 @@ def transition_call(
     if target_status == call.status:
         return call
     if target_status not in ALLOWED_TRANSITIONS.get(call.status, set()):
-        raise CallInvalidTransition(f"Переход {call.status} -> {target_status} запрещён")
+        raise CallInvalidTransition(
+            t("calls.transition_forbidden", current=call.status, target=target_status)
+        )
     normalized_failure_code = failure_code.strip()
     if target_status == CallStatus.FAILED and not FAILURE_CODE_PATTERN.fullmatch(normalized_failure_code):
         raise CallInvalidTransition("Для FAILED требуется нормализованный failure_code")
@@ -106,9 +132,12 @@ def transition_call(
     call.save(update_fields=update_fields)
     timeline_text = _timeline_text(call, target_status)
     if timeline_text is not None:
+        event, params = _timeline_event(call, target_status)
         Message.objects.create(
             conversation_id=call.conversation_id,
             author_type=MessageAuthor.SYSTEM,
+            system_event=event,
+            system_params=params,
             text=timeline_text,
         )
     return call
diff --git a/apps/backend/chatballs/calls/permissions.py b/apps/backend/chatballs/calls/permissions.py
index fec2ea3..c1a5b03 100644
--- a/apps/backend/chatballs/calls/permissions.py
+++ b/apps/backend/chatballs/calls/permissions.py
@@ -1,6 +1,7 @@
 from chatballs.calls.errors import CallAccessDenied
 from chatballs.calls.models import CallSession
 from chatballs.conversations.models import Conversation
+from chatballs.i18n import t
 from chatballs.identity.models import OrganizationMembership
 from chatballs.identity.policy import require_capability
 from chatballs.tenancy.context import TenantContext
@@ -8,11 +9,11 @@ from chatballs.tenancy.context import TenantContext
 
 def ensure_conversation_call_access(*, user, conversation: Conversation) -> None:
     if not require_capability(user, "conversations.call", conversation):
-        raise CallAccessDenied("Нет доступа к звонкам")
+        raise CallAccessDenied(t("calls.no_access"))
     from chatballs.conversations.selectors import conversation_is_visible
 
     if not conversation_is_visible(actor=user, conversation=conversation):
-        raise CallAccessDenied("Диалог вне групп сотрудника")
+        raise CallAccessDenied(t("calls.conversation_outside_groups"))
 
 
 def ensure_call_access(*, user, call_session: CallSession) -> None:
diff --git a/apps/backend/chatballs/calls/public_access.py b/apps/backend/chatballs/calls/public_access.py
index f1a2864..1430650 100644
--- a/apps/backend/chatballs/calls/public_access.py
+++ b/apps/backend/chatballs/calls/public_access.py
@@ -26,6 +26,7 @@ from chatballs.calls.tokens import (
     issue_call_access_token,
     verify_call_access_token,
 )
+from chatballs.i18n import t
 from chatballs.identity.models import Organization, OrganizationMembership
 from chatballs.tenancy.context import TenantContext
 from chatballs.tenancy.database import tenant_atomic
@@ -39,7 +40,7 @@ class ResolvedInvite:
 
 
 def resolve_invite(*, token: str) -> ResolvedInvite:
-    message = "Недействительное или истёкшее приглашение"
+    message = t("calls.invite_invalid")
     token_hash = hash_invite_token(token)
     route = call_invite_route(token_hash)
     if route is None:
@@ -90,11 +91,11 @@ def _authorize_call_access(
     claims = verify_call_access_token(token)
     route = call_session_route(str(claims.call_session_id))
     if route is None:
-        raise CallTokenError("Недействительный или истёкший call access token")
+        raise CallTokenError(t("calls.token_invalid"))
     try:
         organization = Organization.objects.get(pk=route.organization_id)
     except Organization.DoesNotExist:
-        raise CallTokenError("Недействительный или истёкший call access token") from None
+        raise CallTokenError(t("calls.token_invalid")) from None
     resource_context = TenantContext.for_resource(organization)
     with tenant_atomic(resource_context):
         try:
@@ -102,9 +103,9 @@ def _authorize_call_access(
                 "conversation", "conversation__channel", "initiated_by", "organization"
             ).get(id=claims.call_session_id, organization=organization)
         except CallSession.DoesNotExist:
-            raise CallTokenError("Недействительный или истёкший call access token") from None
+            raise CallTokenError(t("calls.token_invalid")) from None
         if call.status in TERMINAL_CALL_STATUSES and not allow_terminal:
-            raise CallTokenError("Звонок уже завершён")
+            raise CallTokenError(t("calls.already_ended"))
         membership = None
         if claims.side == ParticipantSide.STAFF:
             participant = call.participants.select_related("user").filter(
@@ -133,7 +134,7 @@ def _authorize_call_access(
                 or call.status not in {CallStatus.REQUESTED, CallStatus.RINGING}
             )
         if not valid:
-            raise CallTokenError("Недействительный или истёкший call access token")
+            raise CallTokenError(t("calls.token_invalid"))
         context = (
             TenantContext.for_membership(membership)
             if membership is not None
@@ -170,7 +171,7 @@ def _customer_call(
         allow_terminal=allow_terminal,
     )
     if claims.side != ParticipantSide.CUSTOMER:
-        raise CallTokenError("Недействительный или истёкший call access token")
+        raise CallTokenError(t("calls.token_invalid"))
     return call, context
 
 
@@ -186,7 +187,7 @@ def accept_call_by_access_token(*, token: str) -> CallSession:
                 organization=context.organization,
             )
         except CallInvalidTransition as error:
-            raise CallConflict("Приглашение уже нельзя принять") from error
+            raise CallConflict(t("calls.invite_cannot_accept")) from error
 
 
 def decline_call_by_access_token(*, token: str) -> CallSession:
@@ -205,7 +206,7 @@ def decline_call_by_access_token(*, token: str) -> CallSession:
                 organization=context.organization,
             )
         except CallInvalidTransition as error:
-            raise CallConflict("Приглашение уже нельзя отклонить") from error
+            raise CallConflict(t("calls.invite_cannot_decline")) from error
 
 
 def end_call_by_access_token(*, token: str) -> CallSession:
diff --git a/apps/backend/chatballs/calls/services.py b/apps/backend/chatballs/calls/services.py
index 562fe86..d0b246a 100644
--- a/apps/backend/chatballs/calls/services.py
+++ b/apps/backend/chatballs/calls/services.py
@@ -49,9 +49,11 @@ from chatballs.conversations.models import (
     LifecycleState,
     Message,
     MessageAuthor,
+    SystemEvent,
 )
 from chatballs.conversations.services import ClaimError, claim_locked_conversation
 from chatballs.events.services import DomainEvent, enqueue_event
+from chatballs.i18n import t
 from chatballs.integrations.features import call_allowed
 from chatballs.integrations.models import IntegrationProvider
 from chatballs.tenancy.context import TenantContext
@@ -80,7 +82,7 @@ class CreatedCall:
 
 def _conversation_identity(conversation: Conversation) -> ConnectionIdentity:
     if conversation.contact_id is None or conversation.connection_id is None:
-        raise CallConflict("У диалога нет клиентской identity для звонка")
+        raise CallConflict(t("calls.no_client_identity"))
     identities = list(
         ConnectionIdentity.objects.filter(
             contact_id=conversation.contact_id,
@@ -89,29 +91,29 @@ def _conversation_identity(conversation: Conversation) -> ConnectionIdentity:
         .order_by("id")[:2]
     )
     if len(identities) != 1:
-        raise CallConflict("Клиентская identity звонка отсутствует или неоднозначна")
+        raise CallConflict(t("calls.identity_missing_or_ambiguous"))
     return identities[0]
 
 
 def _check_call_creation_conflicts(*, conversation: Conversation, initiator) -> None:
     if conversation.lifecycle != LifecycleState.OPEN:
-        raise CallConflict("Звонок можно запросить только в открытом диалоге")
+        raise CallConflict(t("calls.only_in_open_conversation"))
     if CallSession.objects.filter(
         conversation=conversation,
         status__in=UNFINISHED_CALL_STATUSES,
     ).exists():
-        raise CallConflict("В диалоге уже есть незавершённый звонок")
+        raise CallConflict(t("calls.unfinished_call_exists"))
     if CallSession.objects.filter(
         initiated_by=initiator,
         status__in=UNFINISHED_CALL_STATUSES,
     ).exists():
-        raise CallConflict("Сотрудник уже участвует в другом звонке")
+        raise CallConflict(t("calls.operator_busy"))
     if (
         conversation.control_mode == ControlMode.HUMAN
         and conversation.assigned_operator_id
         and conversation.assigned_operator_id != initiator.id
     ):
-        raise CallConflict("Диалог уже ведёт другой оператор")
+        raise CallConflict(t("calls.conversation_taken"))
 
 
 @transaction.atomic
@@ -120,7 +122,7 @@ def create_call_request(
 ) -> CreatedCall:
     initiator = context.actor_user
     if initiator is None or context.membership is None:
-        raise CallAccessDenied("Для звонка требуется контекст сотрудника")
+        raise CallAccessDenied(t("calls.operator_context_required"))
     conversation = (
         Conversation.objects.select_for_update()
         .select_related("channel")
@@ -151,7 +153,7 @@ def create_call_request(
                 kind=kind,
             )
     except IntegrityError as error:
-        raise CallConflict("Не удалось создать второй незавершённый звонок") from error
+        raise CallConflict(t("calls.second_call_rejected")) from error
 
     CallInvite.objects.create(
         organization=context.organization,
@@ -181,6 +183,10 @@ def create_call_request(
     Message.objects.create(
         conversation=conversation,
         author_type=MessageAuthor.SYSTEM,
+        system_event=SystemEvent.CALL_REQUESTED,
+        # Вид звонка — параметр, а не часть кода: фразу собирает интерфейс, и
+        # «аудио» против «видео» там отдельным словом словаря.
+        system_params={"operator": initiator_label, "kind": call.kind},
         text=f"Оператор {initiator_label} запросил {call_word}",
     )
     if conversation.connection.provider == IntegrationProvider.WEB:
@@ -210,13 +216,13 @@ def create_call_request(
 def issue_staff_access_token(*, context: TenantContext, call_session: CallSession) -> str:
     user = context.actor_user
     if user is None or context.membership is None:
-        raise CallAccessDenied("Для звонка требуется контекст сотрудника")
+        raise CallAccessDenied(t("calls.operator_context_required"))
     ensure_call_access(user=context.membership, call_session=call_session)
     participant_exists = call_session.participants.filter(side=ParticipantSide.STAFF, user=user).exists()
     if not participant_exists:
-        raise CallConflict("Сотрудник не является участником звонка")
+        raise CallConflict(t("calls.not_a_participant"))
     if call_session.status in TERMINAL_CALL_STATUSES:
-        raise CallConflict("Звонок уже завершён")
+        raise CallConflict(t("calls.already_ended"))
     return issue_call_access_token(
         call_session_id=call_session.id,
         side=ParticipantSide.STAFF,
@@ -227,10 +233,10 @@ def issue_staff_access_token(*, context: TenantContext, call_session: CallSessio
 def cancel_call(*, context: TenantContext, call_session: CallSession) -> CallSession:
     user = context.actor_user
     if user is None or context.membership is None:
-        raise CallAccessDenied("Для звонка требуется контекст сотрудника")
+        raise CallAccessDenied(t("calls.operator_context_required"))
     ensure_call_access(user=context.membership, call_session=call_session)
     if not call_session.participants.filter(side=ParticipantSide.STAFF, user=user).exists():
-        raise CallConflict("Сотрудник не является участником звонка")
+        raise CallConflict(t("calls.not_a_participant"))
     try:
         # Повторная отмена идемпотентна: transition_call вернёт звонок без изменений.
         return transition_call(
@@ -239,7 +245,7 @@ def cancel_call(*, context: TenantContext, call_session: CallSession) -> CallSes
             ended_by=CallEndedBy.STAFF,
         )
     except CallInvalidTransition as error:
-        raise CallConflict("Звонок уже нельзя отменить") from error
+        raise CallConflict(t("calls.cannot_cancel")) from error
 
 
 def active_call_for_conversation(conversation: Conversation) -> CallSession | None:
@@ -272,10 +278,10 @@ def webchat_active_call(identity: ConnectionIdentity) -> CallSession | None:
 def open_call_for_identity(*, identity: ConnectionIdentity) -> ResolvedInvite:
     call = webchat_active_call(identity)
     if call is None:
-        raise CallTokenError("Активное приглашение не найдено")
+        raise CallTokenError(t("webchat.no_active_invite"))
     invite = CallInvite.objects.select_for_update().get(call_session=call)
     if invite.expires_at <= timezone.now():
-        raise CallTokenError("Активное приглашение не найдено")
+        raise CallTokenError(t("webchat.no_active_invite"))
     if invite.opened_at is None:
         invite.opened_at = timezone.now()
         invite.save(update_fields=["opened_at"])
@@ -290,7 +296,7 @@ def open_call_for_identity(*, identity: ConnectionIdentity) -> ResolvedInvite:
 def decline_call_for_identity(*, identity: ConnectionIdentity) -> CallSession:
     call = webchat_active_call(identity)
     if call is None:
-        raise CallTokenError("Активное приглашение не найдено")
+        raise CallTokenError(t("webchat.no_active_invite"))
     try:
         return transition_call(
             call_session_id=call.id,
@@ -298,4 +304,4 @@ def decline_call_for_identity(*, identity: ConnectionIdentity) -> CallSession:
             ended_by=CallEndedBy.CUSTOMER,
         )
     except CallInvalidTransition as error:
-        raise CallConflict("Приглашение уже нельзя отклонить") from error
+        raise CallConflict(t("calls.invite_cannot_decline")) from error
diff --git a/apps/backend/chatballs/calls/tokens.py b/apps/backend/chatballs/calls/tokens.py
index 0182e5d..16cee7f 100644
--- a/apps/backend/chatballs/calls/tokens.py
+++ b/apps/backend/chatballs/calls/tokens.py
@@ -14,6 +14,7 @@ from django.conf import settings
 
 from chatballs.calls.errors import CallTokenError
 from chatballs.calls.models import ParticipantSide
+from chatballs.i18n import t
 
 ACCESS_TOKEN_VERSION = 1
 ACCESS_TOKEN_PURPOSE = "call-access"
@@ -82,7 +83,7 @@ def issue_call_access_token(*, call_session_id: uuid.UUID, side: str, subject_id
 
 
 def verify_call_access_token(token: str) -> CallAccessClaims:
-    message = "Недействительный или истёкший call access token"
+    message = t("calls.token_invalid")
     if not token or "." not in token:
         raise CallTokenError(message)
     encoded, signature = token.rsplit(".", 1)
diff --git a/apps/backend/chatballs/calls/views.py b/apps/backend/chatballs/calls/views.py
index ac5cb56..7468a86 100644
--- a/apps/backend/chatballs/calls/views.py
+++ b/apps/backend/chatballs/calls/views.py
@@ -25,6 +25,7 @@ from chatballs.calls.services import (
     resolve_invite,
 )
 from chatballs.conversations.models import Conversation
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 
 
@@ -49,16 +50,16 @@ class CallCreateView(APIView):
 
     def post(self, request: Request, conversation_id: int) -> Response:
         if "kind" not in request.data:
-            return Response({"detail": "Укажите тип звонка"}, status=400)
+            return Response({"detail": t("calls.kind_required")}, status=400)
         kind = str(request.data.get("kind", ""))
         if kind not in CallKind.values:
-            return Response({"detail": "Недопустимый тип звонка"}, status=400)
+            return Response({"detail": t("calls.kind_invalid")}, status=400)
         try:
             created = create_call_request(
                 context=request.tenant_context, conversation_id=conversation_id, kind=kind
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         except CallAccessDenied as error:
             return Response({"detail": str(error)}, status=403)
         except CallConflict as error:
@@ -95,7 +96,7 @@ class CallDetailView(APIView):
                 id=call_session_id, organization=request.tenant_context.organization
             )
         except CallSession.DoesNotExist:
-            return Response({"detail": "Звонок не найден"}, status=404)
+            return Response({"detail": t("calls.not_found")}, status=404)
         try:
             ensure_call_access(user=request.tenant_context.membership, call_session=call)
         except CallAccessDenied as error:
@@ -113,7 +114,7 @@ class StaffAccessTokenView(APIView):
             )
             token = issue_staff_access_token(context=request.tenant_context, call_session=call)
         except CallSession.DoesNotExist:
-            return Response({"detail": "Звонок не найден"}, status=404)
+            return Response({"detail": t("calls.not_found")}, status=404)
         except CallAccessDenied as error:
             return Response({"detail": str(error)}, status=403)
         except CallConflict as error:
@@ -131,7 +132,7 @@ class CallCancelView(APIView):
             )
             cancel_call(context=request.tenant_context, call_session=call)
         except CallSession.DoesNotExist:
-            return Response({"detail": "Звонок не найден"}, status=404)
+            return Response({"detail": t("calls.not_found")}, status=404)
         except CallAccessDenied as error:
             return Response({"detail": str(error)}, status=403)
         except CallConflict as error:
@@ -163,7 +164,7 @@ class ConversationActiveCallView(APIView):
                 user=request.tenant_context.membership, conversation=conversation
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         except CallAccessDenied as error:
             return Response({"detail": str(error)}, status=403)
         call = active_call_for_conversation(conversation)
@@ -181,7 +182,7 @@ class InviteResolveView(APIView):
         try:
             resolved = resolve_invite(token=token)
         except CallTokenError:
-            return Response({"detail": "Недействительное или истёкшее приглашение"}, status=404)
+            return Response({"detail": t("calls.invite_invalid")}, status=404)
         return _token_response(
             {
                 "call": public_invite_payload(
@@ -214,7 +215,7 @@ class CallAccessStateView(_CallAccessView):
         try:
             call = call_state_by_access_token(token=_bearer_token(request))
         except CallTokenError:
-            return Response({"detail": "Недействительный или истёкший call access token"}, status=404)
+            return Response({"detail": t("calls.token_invalid")}, status=404)
         return _token_response(
             {"call": public_call_state_payload(call), "iceServers": ice_servers_payload()}
         )
@@ -225,7 +226,7 @@ class CallAccessAcceptView(_CallAccessView):
         try:
             call = accept_call_by_access_token(token=_bearer_token(request))
         except CallTokenError:
-            return Response({"detail": "Недействительный или истёкший call access token"}, status=404)
+            return Response({"detail": t("calls.token_invalid")}, status=404)
         except CallConflict as error:
             return Response({"detail": str(error)}, status=409)
         return _token_response({"call": public_call_state_payload(call)})
@@ -236,7 +237,7 @@ class CallAccessDeclineView(_CallAccessView):
         try:
             call = decline_call_by_access_token(token=_bearer_token(request))
         except CallTokenError:
-            return Response({"detail": "Недействительный или истёкший call access token"}, status=404)
+            return Response({"detail": t("calls.token_invalid")}, status=404)
         except CallConflict as error:
             return Response({"detail": str(error)}, status=409)
         return _token_response({"call": public_call_state_payload(call)})
@@ -247,5 +248,5 @@ class CallAccessEndView(_CallAccessView):
         try:
             call = end_call_by_access_token(token=_bearer_token(request))
         except CallTokenError:
-            return Response({"detail": "Недействительный или истёкший call access token"}, status=404)
+            return Response({"detail": t("calls.token_invalid")}, status=404)
         return _token_response({"call": public_call_state_payload(call)})
diff --git a/apps/backend/chatballs/channels/authorization.py b/apps/backend/chatballs/channels/authorization.py
index 73966a1..9c4e859 100644
--- a/apps/backend/chatballs/channels/authorization.py
+++ b/apps/backend/chatballs/channels/authorization.py
@@ -9,6 +9,7 @@ from __future__ import annotations
 
 from django.core.exceptions import PermissionDenied
 
+from chatballs.i18n import t
 from chatballs.identity.policy import has_capability_any_scope
 from chatballs.tenancy.context import TenantContext
 
@@ -38,9 +39,9 @@ def require_organization_manage(context: TenantContext, *, operation: str) -> No
 
 def require_channel_manage(context: TenantContext) -> None:
     if not has_organization_capability(context, CHANNELS_MANAGE):
-        raise PermissionDenied("Нет прав на изменение канала")
+        raise PermissionDenied(t("channels.no_rights_to_change"))
 
 
 def require_connections_manage(context: TenantContext) -> None:
     if not has_organization_capability(context, INTEGRATIONS_MANAGE):
-        raise PermissionDenied("Привязка подключения требует integrations.manage")
+        raise PermissionDenied(t("channels.binding_needs_manage"))
diff --git a/apps/backend/chatballs/channels/services.py b/apps/backend/chatballs/channels/services.py
index 66b6fbb..cb07a94 100644
--- a/apps/backend/chatballs/channels/services.py
+++ b/apps/backend/chatballs/channels/services.py
@@ -10,6 +10,7 @@ from django.db import transaction
 
 from chatballs.channels import authorization
 from chatballs.channels.models import Channel
+from chatballs.i18n import t
 from chatballs.identity.group_models import EmployeeGroup
 from chatballs.integrations.models import Integration, IntegrationKind
 from chatballs.tenancy.context import TenantContext
@@ -34,7 +35,7 @@ class ChannelHasReferences(Exception):
 
     def __init__(self, blockers: list[dict[str, Any]]) -> None:
         self.blockers = blockers
-        super().__init__("Канал нельзя удалить: есть связанные записи")
+        super().__init__(t("channels.cannot_delete_linked"))
 
     def payload(self) -> dict[str, Any]:
         return {"detail": str(self), "blockers": self.blockers}
diff --git a/apps/backend/chatballs/conversations/attachment_views.py b/apps/backend/chatballs/conversations/attachment_views.py
index b4a9b19..b19d03d 100644
--- a/apps/backend/chatballs/conversations/attachment_views.py
+++ b/apps/backend/chatballs/conversations/attachment_views.py
@@ -28,6 +28,7 @@ from chatballs.conversations.serializers import message_payload
 from chatballs.conversations.transports.base import guess_content_type, safe_filename
 from chatballs.conversations.view_base import ConversationViewBase
 from chatballs.conversations.voice_views import _visible_message
+from chatballs.i18n import t
 
 MAX_FILE_BYTES = 20 * 1024 * 1024
 # Исполняемые и скриптовые типы в чат не отправляем ни в одну сторону.
@@ -62,9 +63,9 @@ class MessageAttachmentView(ConversationViewBase):
         try:
             message = _visible_message(request, message_id)
         except (Message.DoesNotExist, Conversation.DoesNotExist):
-            return Response({"detail": "Сообщение не найдено"}, status=404)
+            return Response({"detail": t("conversations.message_not_found")}, status=404)
         if message.kind != MessageKind.FILE or not message.attachment:
-            return Response({"detail": "Файл недоступен"}, status=404)
+            return Response({"detail": t("conversations.file_unavailable")}, status=404)
         return attachment_response(message, inline="inline" in request.GET)
 
 
@@ -80,15 +81,15 @@ class ConversationAttachmentView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         if conversation.lifecycle != LifecycleState.OPEN:
-            return Response({"detail": "Диалог закрыт"}, status=409)
+            return Response({"detail": t("conversations.closed")}, status=409)
         connection = conversation.connection
         if connection is None or not transports.supports_file_send(connection):
-            return Response({"detail": "Файлы недоступны в этом канале"}, status=400)
+            return Response({"detail": t("conversations.files_unavailable_channel")}, status=400)
         upload = request.FILES.get("file")
         if upload is None:
-            return Response({"detail": "Прикрепите файл"}, status=400)
+            return Response({"detail": t("conversations.attach_file")}, status=400)
         problem = validate_upload(upload)
         if problem:
             return Response({"detail": problem}, status=400)
@@ -113,7 +114,7 @@ class ConversationAttachmentView(ConversationViewBase):
             caption=caption,
         )
         if not sent:
-            return Response({"detail": "Не удалось отправить файл в канал"}, status=502)
+            return Response({"detail": t("conversations.file_send_failed")}, status=502)
         message = Message.objects.create(
             conversation=conversation,
             author_type=MessageAuthor.OPERATOR,
diff --git a/apps/backend/chatballs/conversations/chat_extras_views.py b/apps/backend/chatballs/conversations/chat_extras_views.py
index 6681410..145b0d3 100644
--- a/apps/backend/chatballs/conversations/chat_extras_views.py
+++ b/apps/backend/chatballs/conversations/chat_extras_views.py
@@ -25,6 +25,7 @@ from chatballs.conversations.models import (
 from chatballs.conversations.selectors import apply_conversation_visibility
 from chatballs.conversations.serializers import conversation_payload
 from chatballs.conversations.view_base import ConversationViewBase
+from chatballs.i18n import t
 from chatballs.identity.avatars import user_avatar_url
 from chatballs.identity.group_models import EmployeeGroup
 from chatballs.identity.models import HumanUser, OrganizationMembership
@@ -53,10 +54,10 @@ class ConversationPriorityView(ConversationViewBase):
                 request, conversation_id, self.required_capability
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         priority = str(request.data.get("priority", "")).strip().upper()
         if priority not in ConversationPriority.values:
-            return Response({"detail": "Неизвестный приоритет"}, status=400)
+            return Response({"detail": t("conversations.unknown_priority")}, status=400)
         conversation.priority = priority
         conversation.save(update_fields=["priority"])
         self._audit(request, "priority_changed", conversation)
@@ -82,10 +83,10 @@ class ConversationContactView(ConversationViewBase):
                 request, conversation_id, self.required_capability
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         contact = conversation.contact
         if contact is None:
-            return Response({"detail": "У диалога нет контакта"}, status=400)
+            return Response({"detail": t("conversations.no_contact")}, status=400)
         changed: list[str] = []
         for field, limit in self.LIMITS.items():
             if field not in request.data:
@@ -94,7 +95,7 @@ class ConversationContactView(ConversationViewBase):
             if len(value) > limit:
                 return Response({"detail": f"Поле {field}: не длиннее {limit} символов"}, status=400)
             if field == "name" and not value:
-                return Response({"detail": "Имя контакта не может быть пустым"}, status=400)
+                return Response({"detail": t("conversations.contact_name_empty")}, status=400)
             setattr(contact, field, value)
             changed.append(field)
         if changed:
@@ -118,10 +119,10 @@ class ConversationNoteView(ConversationViewBase):
                 request, conversation_id, self.required_capability
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         note = str(request.data.get("note", ""))
         if len(note) > 4000:
-            return Response({"detail": "Заметка длиннее 4000 символов"}, status=400)
+            return Response({"detail": t("conversations.note_too_long")}, status=400)
         conversation.note = note
         conversation.note_author = request.user if note else None
         conversation.note_updated_at = timezone.now() if note else None
@@ -146,7 +147,7 @@ class ConversationLabelsView(ConversationViewBase):
                 request, conversation_id, self.required_capability
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         label_ids = request.data.get("labelIds")
         if not isinstance(label_ids, list) or not all(
             isinstance(item, int) for item in label_ids
@@ -159,7 +160,7 @@ class ConversationLabelsView(ConversationViewBase):
             )
         )
         if len(labels) != len(set(label_ids)):
-            return Response({"detail": "Неизвестная метка"}, status=400)
+            return Response({"detail": t("conversations.unknown_label")}, status=400)
         conversation.labels.set(labels)
         return Response(
             {
@@ -182,13 +183,13 @@ class ConversationArchiveView(ConversationViewBase):
                 request, conversation_id, self.required_capability
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         archived = request.data.get("archived")
         if not isinstance(archived, bool):
             return Response({"detail": "archived must be a boolean"}, status=400)
         if not archived and not can_administer_access(request.tenant_context.membership):
             return Response(
-                {"detail": "Восстановить диалог может только администратор"}, status=403
+                {"detail": t("conversations.restore_admin_only")}, status=403
             )
         conversation.archived_at = timezone.now() if archived else None
         conversation.save(update_fields=["archived_at"])
@@ -336,9 +337,9 @@ class LabelListView(APIView):
         name = str(request.data.get("name", "")).strip()
         color = str(request.data.get("color", "")).strip()
         if not name or len(name) > 60:
-            return Response({"detail": "Название метки: 1-60 символов"}, status=400)
+            return Response({"detail": t("conversations.label_name_length")}, status=400)
         if len(color) > 20:
-            return Response({"detail": "Некорректный цвет"}, status=400)
+            return Response({"detail": t("conversations.invalid_colour")}, status=400)
         existing = ConversationLabel.objects.filter(
             organization_id=request.tenant_context.organization_id, name__iexact=name
         ).first()
@@ -365,16 +366,16 @@ class LabelDetailView(APIView):
         try:
             label = self._label(request, label_id)
         except ConversationLabel.DoesNotExist:
-            return Response({"detail": "Метка не найдена"}, status=404)
+            return Response({"detail": t("conversations.label_not_found")}, status=404)
         if "name" in request.data:
             name = str(request.data.get("name", "")).strip()
             if not name or len(name) > 60:
-                return Response({"detail": "Название метки: 1-60 символов"}, status=400)
+                return Response({"detail": t("conversations.label_name_length")}, status=400)
             label.name = name
         if "color" in request.data:
             color = str(request.data.get("color", "")).strip()
             if len(color) > 20:
-                return Response({"detail": "Некорректный цвет"}, status=400)
+                return Response({"detail": t("conversations.invalid_colour")}, status=400)
             label.color = color
         label.save()
         return Response({"label": _label_payload(label)})
@@ -383,7 +384,7 @@ class LabelDetailView(APIView):
         try:
             label = self._label(request, label_id)
         except ConversationLabel.DoesNotExist:
-            return Response({"detail": "Метка не найдена"}, status=404)
+            return Response({"detail": t("conversations.label_not_found")}, status=404)
         label.delete()
         return Response(status=204)
 
@@ -405,13 +406,13 @@ class ReplyTemplateListView(APIView):
         title = str(request.data.get("title", "")).strip()
         text = str(request.data.get("text", "")).strip()
         if not title or len(title) > 120:
-            return Response({"detail": "Название шаблона: 1-120 символов"}, status=400)
+            return Response({"detail": t("conversations.template_name_length")}, status=400)
         if not text:
-            return Response({"detail": "Текст шаблона обязателен"}, status=400)
+            return Response({"detail": t("conversations.template_text_required")}, status=400)
         if ReplyTemplate.objects.filter(
             organization_id=request.tenant_context.organization_id, title__iexact=title
         ).exists():
-            return Response({"detail": "Шаблон с таким названием уже есть"}, status=409)
+            return Response({"detail": t("conversations.template_name_taken")}, status=409)
         template = ReplyTemplate.objects.create(
             organization_id=request.tenant_context.organization_id,
             title=title,
@@ -433,16 +434,16 @@ class ReplyTemplateDetailView(APIView):
         try:
             template = self._template(request, template_id)
         except ReplyTemplate.DoesNotExist:
-            return Response({"detail": "Шаблон не найден"}, status=404)
+            return Response({"detail": t("conversations.template_not_found")}, status=404)
         if "title" in request.data:
             title = str(request.data.get("title", "")).strip()
             if not title or len(title) > 120:
-                return Response({"detail": "Название шаблона: 1-120 символов"}, status=400)
+                return Response({"detail": t("conversations.template_name_length")}, status=400)
             template.title = title
         if "text" in request.data:
             text = str(request.data.get("text", "")).strip()
             if not text:
-                return Response({"detail": "Текст шаблона обязателен"}, status=400)
+                return Response({"detail": t("conversations.template_text_required")}, status=400)
             template.text = text
         template.save()
         return Response({"template": _template_payload(template)})
@@ -451,6 +452,6 @@ class ReplyTemplateDetailView(APIView):
         try:
             template = self._template(request, template_id)
         except ReplyTemplate.DoesNotExist:
-            return Response({"detail": "Шаблон не найден"}, status=404)
+            return Response({"detail": t("conversations.template_not_found")}, status=404)
         template.delete()
         return Response(status=204)
diff --git a/apps/backend/chatballs/conversations/clients.py b/apps/backend/chatballs/conversations/clients.py
index fc9cccd..17e8586 100644
--- a/apps/backend/chatballs/conversations/clients.py
+++ b/apps/backend/chatballs/conversations/clients.py
@@ -26,10 +26,11 @@ from chatballs.conversations.models import (
     Conversation,
     LifecycleState,
 )
+from chatballs.i18n import t
 from chatballs.identity.audit_catalog import (
-    AUDIT_RESULT_LABELS,
     audit_action_label,
     audit_object_label,
+    audit_result_label,
 )
 from chatballs.identity.avatars import user_avatar_url_in
 from chatballs.identity.models import AuditEvent
@@ -154,7 +155,11 @@ def client_row(contact: Contact) -> dict:
     return {
         "id": contact.id,
         "cid": f"CUS-{contact.id}",
-        "name": contact.name or "Гость",
+        "name": contact.name or t("conversations.guest"),
+        # Признак анонимного посетителя: интерфейс красит его аватар иначе.
+        # Раньше он выводился из самой подписи регуляркой по слову «Гость» —
+        # на другом языке это перестало бы работать.
+        "isGuest": not contact.name,
         "phone": contact.phone,
         "avatarUrl": contact.avatar_url,
         "email": next(
@@ -278,14 +283,18 @@ def client_detail(organization_id: int, contact_id: int) -> dict:
                 "action": audit_action_label(event.action) or event.action,
                 "object": audit_object_label(event.object_type, event.object_id),
                 "actor": (event.actor.full_name or event.actor.email) if event.actor_id else "Система",
-                "result": AUDIT_RESULT_LABELS.get(event.result, "Неизвестно"),
+                "result": audit_result_label(event.result),
             }
         )
 
     return {
         "id": contact.id,
         "cid": f"CUS-{contact.id}",
-        "name": contact.name or "Гость",
+        "name": contact.name or t("conversations.guest"),
+        # Признак анонимного посетителя: интерфейс красит его аватар иначе.
+        # Раньше он выводился из самой подписи регуляркой по слову «Гость» —
+        # на другом языке это перестало бы работать.
+        "isGuest": not contact.name,
         "phone": contact.phone,
         "avatarUrl": contact.avatar_url,
         # Поля карточки из чата (описание, компания, город).
@@ -325,7 +334,7 @@ def _merges(organization_id: int, contact: Contact) -> list[dict]:
         {
             "id": row.id,
             "sourceId": row.source_id,
-            "sourceName": row.source.name or "Гость",
+            "sourceName": row.source.name or t("conversations.guest"),
             "sourceCid": f"CUS-{row.source_id}",
             "reason": row.reason,
             "actor": _actor_name(row.actor),
@@ -354,7 +363,8 @@ def _duplicate_candidate(organization_id: int, contact: Contact) -> dict | None:
     return {
         "id": other.id,
         "cid": f"CUS-{other.id}",
-        "name": other.name or "Гость",
+        "name": other.name or t("conversations.guest"),
+        "isGuest": not other.name,
         "avatarUrl": other.avatar_url,
         "dialogs": other.conversations.count(),
         "sources": sorted({identity.connection.provider for identity in identities}),
diff --git a/apps/backend/chatballs/conversations/contacts_merge.py b/apps/backend/chatballs/conversations/contacts_merge.py
index aa2b57b..f8e4d23 100644
--- a/apps/backend/chatballs/conversations/contacts_merge.py
+++ b/apps/backend/chatballs/conversations/contacts_merge.py
@@ -13,6 +13,7 @@ from django.db import transaction
 from django.utils import timezone
 
 from chatballs.conversations.models import ConnectionIdentity, Contact, ContactMerge, Conversation
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 
 # Поля карточки, которые дозаполняются из исходного контакта, если у целевого
@@ -24,7 +25,7 @@ MIN_REASON_LENGTH = 5
 def _clean_reason(reason: str) -> str:
     cleaned = (reason or "").strip()
     if len(cleaned) < MIN_REASON_LENGTH:
-        raise ValidationError("Укажите причину объединения — она попадёт в журнал действий")
+        raise ValidationError(t("sales.merge_reason_required"))
     return cleaned[:2000]
 
 
@@ -33,14 +34,14 @@ def merge_contacts(*, organization, target_id: int, source_id: int, reason: str,
     """Перенести идентичности и диалоги source в target."""
     cleaned = _clean_reason(reason)
     if target_id == source_id:
-        raise ValidationError("Нельзя объединить контакт с самим собой")
+        raise ValidationError(t("sales.merge_self"))
     try:
         target = Contact.objects.select_for_update().get(organization=organization, id=target_id)
         source = Contact.objects.select_for_update().get(organization=organization, id=source_id)
     except Contact.DoesNotExist as error:
-        raise ValidationError("Контакт не найден") from error
+        raise ValidationError(t("sales.contact_not_found")) from error
     if source.merged_into_id is not None or target.merged_into_id is not None:
-        raise ValidationError("Контакт уже объединён с другим — сначала разъедините")
+        raise ValidationError(t("sales.already_merged"))
 
     identity_ids = list(ConnectionIdentity.objects.filter(contact=source).values_list("id", flat=True))
     conversation_ids = list(
@@ -94,9 +95,9 @@ def revert_merge(*, organization, merge_id: int, reason: str, actor, request=Non
     try:
         merge = ContactMerge.objects.select_for_update().get(organization=organization, id=merge_id)
     except ContactMerge.DoesNotExist as error:
-        raise ValidationError("Объединение не найдено") from error
+        raise ValidationError(t("sales.merge_not_found")) from error
     if merge.reverted_at is not None:
-        raise ValidationError("Это объединение уже разъединено")
+        raise ValidationError(t("sales.already_unmerged"))
 
     source = merge.source
     target = merge.target
diff --git a/apps/backend/chatballs/conversations/ingest.py b/apps/backend/chatballs/conversations/ingest.py
index d73e846..8c0c2d2 100644
--- a/apps/backend/chatballs/conversations/ingest.py
+++ b/apps/backend/chatballs/conversations/ingest.py
@@ -28,10 +28,12 @@ from chatballs.conversations.models import (
     Message,
     MessageAuthor,
     MessageKind,
+    SystemEvent,
     TranscriptStatus,
 )
 from chatballs.conversations.transports.base import InboundMessage
 from chatballs.events.models import EventOwnership, InboxEvent
+from chatballs.i18n import t
 from chatballs.notifications.models import NotificationAudience, NotificationType
 from chatballs.notifications.services import notify, notify_management
 from chatballs.tenancy.context import TenantContext
@@ -303,6 +305,14 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
             audience=NotificationAudience.OPERATORS,
             title=f"Новый диалог · {channel.name}",
             body=f"{contact.name or 'Гость'} · {integration.provider}: {message_text[:80]}",
+            title_key="notifications.new_dialog",
+            body_key="notifications.new_dialog_body",
+            text_params={
+                "channel": channel.name,
+                "contact": contact.name or t("conversations.guest"),
+                "provider": integration.provider,
+                "preview": message_text[:80],
+            },
             target_id=conversation.id,
             source_type="Conversation",
             source_id=conversation.id,
@@ -318,6 +328,8 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
             recipient_user=operator,
             title=f"Новое сообщение · {contact.name or 'Гость'}",
             body=message_text[:120],
+            title_key="notifications.new_message",
+            text_params={"contact": contact.name or t("conversations.guest")},
             target_id=conversation.id,
             source_type="Conversation",
             source_id=conversation.id,
@@ -352,7 +364,10 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
                 type=NotificationType.DIALOG_WAITING,
                 audience=NotificationAudience.OPERATORS,
                 title=f"Нужен оператор · {contact.name or 'Гость'}",
+                title_key="notifications.operator_needed",
+                text_params={"contact": contact.name or t("conversations.guest")},
                 body="Голосовое без расшифровки" if is_voice else message_text[:120],
+                body_key="notifications.voice_without_transcript" if is_voice else "",
                 target_id=conversation.id,
                 source_type="Conversation",
                 source_id=conversation.id,
@@ -376,7 +391,12 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
         conversation.expected_responder = ExpectedResponder.OPERATOR
         conversation.last_activity_at = timezone.now()
         conversation.save(update_fields=["control_mode", "expected_responder", "last_activity_at"])
-        Message.objects.create(conversation=conversation, author_type=MessageAuthor.SYSTEM, text="AI недоступен — диалог передан оператору")
+        Message.objects.create(
+            conversation=conversation,
+            author_type=MessageAuthor.SYSTEM,
+            system_event=SystemEvent.AI_UNAVAILABLE,
+            text="AI недоступен — диалог передан оператору",
+        )
         fallback = "Извините, прямо сейчас не получается ответить. Я передал ваш вопрос специалисту — он скоро подключится."
         Message.objects.create(conversation=conversation, author_type=MessageAuthor.AI, text=fallback)
         notify(
@@ -384,7 +404,10 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
             type=NotificationType.DIALOG_WAITING,
             audience=NotificationAudience.OPERATORS,
             title=f"Нужен оператор · {contact.name or 'Гость'}",
+            title_key="notifications.operator_needed",
+            text_params={"contact": contact.name or t("conversations.guest")},
             body="AI временно недоступен, диалог ждёт ответа",
+            body_key="notifications.ai_unavailable_waiting",
             target_id=conversation.id,
             source_type="Conversation",
             source_id=conversation.id,
@@ -395,6 +418,9 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
             type=NotificationType.INTEGRATION_ERROR,
             title=f"Ошибка AI · {channel.name}",
             body="AI временно недоступен, диалог передан оператору",
+            title_key="notifications.ai_error",
+            body_key="notifications.ai_unavailable_handed_over",
+            text_params={"channel": channel.name},
             target_id=conversation.id,
             source_type="Conversation",
             source_id=conversation.id,
@@ -418,12 +444,19 @@ def ingest_inbound(integration, inbound: InboundMessage) -> None:
     conversation.save(update_fields=["control_mode", "last_activity_at", "expected_responder"])
 
     if handoff:
-        Message.objects.create(conversation=conversation, author_type=MessageAuthor.SYSTEM, text="AI передал диалог оператору")
+        Message.objects.create(
+            conversation=conversation,
+            author_type=MessageAuthor.SYSTEM,
+            system_event=SystemEvent.AI_HANDED_OVER,
+            text="AI передал диалог оператору",
+        )
         notify(
             context=context,
             type=NotificationType.DIALOG_WAITING,
             audience=NotificationAudience.OPERATORS,
             title=f"AI передал диалог · {contact.name or 'Гость'}",
+            title_key="notifications.ai_handed_over",
+            text_params={"contact": contact.name or t("conversations.guest")},
             body=ai_input[:120],
             target_id=conversation.id,
             source_type="Conversation",
diff --git a/apps/backend/chatballs/conversations/migrations/0021_i18n_events.py b/apps/backend/chatballs/conversations/migrations/0021_i18n_events.py
new file mode 100644
index 0000000..bfdeee3
--- /dev/null
+++ b/apps/backend/chatballs/conversations/migrations/0021_i18n_events.py
@@ -0,0 +1,23 @@
+# Generated by Django 5.2.17 on 2026-09-09 19:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('conversations', '0020_conversation_last_message_at_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='message',
+            name='system_event',
+            field=models.CharField(blank=True, choices=[('operator_took', 'Оператор перехватил диалог'), ('returned_to_ai', 'Диалог возвращён AI'), ('returned_to_queue', 'Диалог возвращён в очередь'), ('ai_unavailable', 'AI недоступен'), ('ai_handed_over', 'AI передал диалог оператору'), ('call_requested', 'Запрошен звонок'), ('call_accepted', 'Клиент принял приглашение'), ('call_declined', 'Клиент отклонил приглашение'), ('call_cancelled', 'Приглашение отменено'), ('call_missed', 'Звонок пропущен'), ('call_expired', 'Приглашение истекло'), ('call_started', 'Звонок начался'), ('call_ended', 'Звонок завершён'), ('call_failed', 'Звонок не состоялся')], default='', max_length=32),
+        ),
+        migrations.AddField(
+            model_name='message',
+            name='system_params',
+            field=models.JSONField(blank=True, default=dict),
+        ),
+    ]
diff --git a/apps/backend/chatballs/conversations/models.py b/apps/backend/chatballs/conversations/models.py
index 2575930..5a8e8c5 100644
--- a/apps/backend/chatballs/conversations/models.py
+++ b/apps/backend/chatballs/conversations/models.py
@@ -257,6 +257,33 @@ class MessageAuthor(models.TextChoices):
     SYSTEM = "SYSTEM", "Система"
 
 
+class SystemEvent(models.TextChoices):
+    """Код системного события диалога.
+
+    Текст события раньше писался в ``text`` по-русски и оставался таким
+    навсегда: история — записи, а не подписи, и перевести её задним числом
+    нельзя. Поэтому в базу идёт код, а фразу собирает интерфейс на языке того,
+    кто её читает. ``text`` продолжает заполняться: он остаётся и запасным
+    вариантом для строк, записанных до этого поля, и тем, что видно в базе
+    глазами.
+    """
+
+    OPERATOR_TOOK = "operator_took", "Оператор перехватил диалог"
+    RETURNED_TO_AI = "returned_to_ai", "Диалог возвращён AI"
+    RETURNED_TO_QUEUE = "returned_to_queue", "Диалог возвращён в очередь"
+    AI_UNAVAILABLE = "ai_unavailable", "AI недоступен"
+    AI_HANDED_OVER = "ai_handed_over", "AI передал диалог оператору"
+    CALL_REQUESTED = "call_requested", "Запрошен звонок"
+    CALL_ACCEPTED = "call_accepted", "Клиент принял приглашение"
+    CALL_DECLINED = "call_declined", "Клиент отклонил приглашение"
+    CALL_CANCELLED = "call_cancelled", "Приглашение отменено"
+    CALL_MISSED = "call_missed", "Звонок пропущен"
+    CALL_EXPIRED = "call_expired", "Приглашение истекло"
+    CALL_STARTED = "call_started", "Звонок начался"
+    CALL_ENDED = "call_ended", "Звонок завершён"
+    CALL_FAILED = "call_failed", "Звонок не состоялся"
+
+
 class MessageKind(models.TextChoices):
     TEXT = "", "Текст"
     CONTACT_REQUEST = "contact_request", "Запрос контакта"
@@ -300,6 +327,11 @@ class Message(TenantRelationModel):
     # телефона), полученный контакт. Пустая строка = текст.
     kind = models.CharField(max_length=32, choices=MessageKind.choices, default=MessageKind.TEXT, blank=True)
     text = models.TextField(blank=True)
+    # Системное событие: код и его параметры (имя оператора, длительность).
+    # Пустой код — обычное сообщение либо системная запись, сделанная до
+    # появления поля; такие показываются по сохранённому тексту.
+    system_event = models.CharField(max_length=32, choices=SystemEvent.choices, blank=True, default="")
+    system_params = models.JSONField(default=dict, blank=True)
     # Санитизированный HTML входящего email. Остальные транспорты и исходящие
     # ответы используют plain text.
     content_html = models.TextField(blank=True)
diff --git a/apps/backend/chatballs/conversations/reporting_views.py b/apps/backend/chatballs/conversations/reporting_views.py
index eb09ed4..6d44b7f 100644
--- a/apps/backend/chatballs/conversations/reporting_views.py
+++ b/apps/backend/chatballs/conversations/reporting_views.py
@@ -8,6 +8,7 @@ from chatballs.conversations.contacts_merge import merge_contacts, revert_merge
 from chatballs.conversations.models import Contact
 from chatballs.conversations.stats import sales_overview_stats
 from chatballs.conversations.view_base import ConversationViewBase
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.models import EmployeeRole
 
@@ -41,14 +42,14 @@ class ClientDetailView(ConversationViewBase):
         try:
             return Response({"client": client_detail(self._org(request).id, contact_id)})
         except Contact.DoesNotExist:
-            return Response({"detail": "Клиент не найден"}, status=404)
+            return Response({"detail": t("sales.client_not_found")}, status=404)
 
     def patch(self, request: Request, contact_id: int) -> Response:
         organization = self._org(request)
         try:
             contact = Contact.objects.get(id=contact_id, organization=organization)
         except Contact.DoesNotExist:
-            return Response({"detail": "Клиент не найден"}, status=404)
+            return Response({"detail": t("sales.client_not_found")}, status=404)
         changed: list[str] = []
         for field, limit in self.LIMITS.items():
             if field not in request.data:
@@ -57,7 +58,7 @@ class ClientDetailView(ConversationViewBase):
             if len(value) > limit:
                 return Response({"detail": f"Поле {field}: не длиннее {limit} символов"}, status=400)
             if field == "name" and not value:
-                return Response({"detail": "Имя контакта не может быть пустым"}, status=400)
+                return Response({"detail": t("conversations.contact_name_empty")}, status=400)
             setattr(contact, field, value)
             changed.append(field)
         if changed:
@@ -86,7 +87,7 @@ class ClientMergeView(ConversationViewBase):
     def _owner_only(self, request: Request) -> Response | None:
         membership = request.tenant_context.membership
         if membership is None or membership.role != EmployeeRole.OWNER:
-            return Response({"detail": "Объединять контакты может только владелец"}, status=403)
+            return Response({"detail": t("sales.merge_owner_only")}, status=403)
         return None
 
     def post(self, request: Request, contact_id: int) -> Response:
diff --git a/apps/backend/chatballs/conversations/serializers.py b/apps/backend/chatballs/conversations/serializers.py
index 733f7db..8d54a20 100644
--- a/apps/backend/chatballs/conversations/serializers.py
+++ b/apps/backend/chatballs/conversations/serializers.py
@@ -7,11 +7,23 @@ from chatballs.conversations.models import (
     MessageAuthor,
     MessageKind,
 )
+from chatballs.i18n import t
 from chatballs.identity.avatars import user_avatar_url_in
 from chatballs.integrations.features import features_payload
 from chatballs.integrations.models import IntegrationProvider
 
 
+def _system_text(message: Message) -> str:
+    params = message.system_params or {}
+    # Вид звонка приходит кодом (AUDIO/VIDEO): слово для него — тоже в каталоге.
+    if params.get("kind"):
+        params = {**params, "kind": t(f"calls.kind_{str(params['kind']).lower()}")}
+    rendered = t(f"conversations.system.{message.system_event}", **params)
+    # Ключа нет в каталоге — t вернул сам ключ; тогда честнее показать то, что
+    # записано, чем служебный код.
+    return message.text if rendered.startswith("conversations.system.") else rendered
+
+
 def message_payload(message: Message) -> dict[str, object]:
     payload = {
         "id": message.id,
@@ -21,7 +33,14 @@ def message_payload(message: Message) -> dict[str, object]:
         "authorName": (message.author_user.full_name or message.author_user.email) if message.author_user_id and message.author_user else "",
         "authorAvatarUrl": user_avatar_url_in(message.author_user, message.organization_id) if message.author_user_id and message.author_user else None,
         "kind": message.kind,
-        "text": message.text,
+        # Системное событие собирается по коду на языке запроса: историю
+        # диалога читают оба — и русскоязычный оператор, и англоязычный, — а
+        # записана она один раз. Код без перевода и записи, сделанные до его
+        # появления, приходят сохранённым текстом.
+        "text": _system_text(message) if message.system_event else message.text,
+        # Код нужен интерфейсу ещё и для тона строки: передача — предупреждение,
+        # взятие — акцент. Раньше тон угадывался регуляркой по русским словам.
+        "systemEvent": message.system_event,
         "contentHtml": message.content_html,
         "createdAt": message.created_at.isoformat(),
     }
diff --git a/apps/backend/chatballs/conversations/services.py b/apps/backend/chatballs/conversations/services.py
index 695f388..c29d8a9 100644
--- a/apps/backend/chatballs/conversations/services.py
+++ b/apps/backend/chatballs/conversations/services.py
@@ -11,7 +11,9 @@ from chatballs.conversations.models import (
     Message,
     MessageAuthor,
     MessageKind,
+    SystemEvent,
 )
+from chatballs.i18n import t
 from chatballs.identity.models import EmployeeRole
 from chatballs.integrations.models import IntegrationProvider
 from chatballs.tenancy.context import TenantContext
@@ -36,7 +38,7 @@ def _require_open(conversation: Conversation) -> None:
 
     if conversation.lifecycle != LifecycleState.OPEN:
 
-        raise ClaimError("Диалог закрыт")
+        raise ClaimError(t("conversations.closed"))
 
 
 
@@ -76,7 +78,7 @@ def claim_locked_conversation(*, context: TenantContext, conversation: Conversat
 
     if operator is None or conversation.organization_id != context.organization_id:
 
-        raise ClaimError("Диалог недоступен")
+        raise ClaimError(t("conversations.unavailable"))
 
     _require_open(conversation)
 
@@ -98,7 +100,7 @@ def claim_locked_conversation(*, context: TenantContext, conversation: Conversat
 
     ):
 
-        raise ClaimError("Диалог уже ведёт другой оператор")
+        raise ClaimError(t("calls.conversation_taken"))
 
     conversation.control_mode = ControlMode.HUMAN
 
@@ -140,7 +142,7 @@ def release_to_ai(*, context: TenantContext, conversation_id: int) -> Conversati
 
     if agent is None or not agent.is_active:
 
-        raise ClaimError("У канала нет активного AI-агента")
+        raise ClaimError(t("channels.no_active_agent"))
 
     conversation.control_mode = ControlMode.AI
 
@@ -150,7 +152,12 @@ def release_to_ai(*, context: TenantContext, conversation_id: int) -> Conversati
 
     conversation.save(update_fields=["control_mode", "assigned_operator", "expected_responder"])
 
-    Message.objects.create(conversation=conversation, author_type=MessageAuthor.SYSTEM, text="Диалог возвращён AI")
+    Message.objects.create(
+        conversation=conversation,
+        author_type=MessageAuthor.SYSTEM,
+        system_event=SystemEvent.RETURNED_TO_AI,
+        text="Диалог возвращён AI",
+    )
 
     return conversation
 
@@ -180,7 +187,12 @@ def return_to_queue(*, context: TenantContext, conversation_id: int) -> Conversa
 
     conversation.save(update_fields=["control_mode", "assigned_operator", "expected_responder"])
 
-    Message.objects.create(conversation=conversation, author_type=MessageAuthor.SYSTEM, text="Диалог возвращён в очередь")
+    Message.objects.create(
+        conversation=conversation,
+        author_type=MessageAuthor.SYSTEM,
+        system_event=SystemEvent.RETURNED_TO_QUEUE,
+        text="Диалог возвращён в очередь",
+    )
 
     return conversation
 
diff --git a/apps/backend/chatballs/conversations/transports/base.py b/apps/backend/chatballs/conversations/transports/base.py
index 5d3d692..f95b058 100644
--- a/apps/backend/chatballs/conversations/transports/base.py
+++ b/apps/backend/chatballs/conversations/transports/base.py
@@ -10,6 +10,7 @@ from dataclasses import dataclass, field
 
 from django.conf import settings
 
+from chatballs.i18n import t
 from chatballs.integrations.outbound import ensure_downloadable
 from chatballs.integrations.proxy import build_opener
 
@@ -104,7 +105,7 @@ def download_bytes(
     with opener.open(request, timeout=settings.CHATBALLS_AI_REQUEST_TIMEOUT) as response:
         data = response.read(max_bytes + 1)
     if len(data) > max_bytes:
-        raise ValueError("Файл больше допустимого размера")
+        raise ValueError(t("conversations.file_too_large"))
     return data
 
 
diff --git a/apps/backend/chatballs/conversations/views.py b/apps/backend/chatballs/conversations/views.py
index 522a602..5ea2f6f 100644
--- a/apps/backend/chatballs/conversations/views.py
+++ b/apps/backend/chatballs/conversations/views.py
@@ -39,6 +39,7 @@ from chatballs.conversations.services import (
     return_to_queue,
 )
 from chatballs.conversations.view_base import ConversationViewBase
+from chatballs.i18n import t
 from chatballs.identity.group_models import EmployeeGroup
 from chatballs.identity.models import OrganizationMembership
 from chatballs.identity.policy import ResourceScope, authorize, can_administer_access
@@ -58,7 +59,7 @@ class ConversationListView(ConversationViewBase):
         # «Удалённые» (архив) скрыты; просмотр архива — только администратор.
         if params.get("archived") == "1":
             if not can_administer_access(request.tenant_context.membership):
-                return Response({"detail": "Архив доступен администраторам"}, status=403)
+                return Response({"detail": t("conversations.archive_admin_only")}, status=403)
             items = items.filter(archived_at__isnull=False)
         else:
             items = items.filter(archived_at__isnull=True)
@@ -145,7 +146,7 @@ class ConversationDetailView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         # Открытие диалога = прочтение: двигаем персональную отметку до последнего
         # сообщения (detail поллится каждые 3 с — пишем только при продвижении).
         last_id = conversation.messages.order_by("-id").values_list("id", flat=True).first() or 0
@@ -174,7 +175,7 @@ class ConversationClaimView(ConversationViewBase):
         try:
             self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         try:
             conversation = claim_conversation(
                 context=request.tenant_context, conversation_id=conversation_id
@@ -200,7 +201,7 @@ class ConversationReleaseView(ConversationViewBase):
         try:
             self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         try:
             conversation = release_to_ai(
                 context=request.tenant_context, conversation_id=conversation_id
@@ -226,7 +227,7 @@ class ConversationReturnQueueView(ConversationViewBase):
         try:
             self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         try:
             conversation = return_to_queue(
                 context=request.tenant_context, conversation_id=conversation_id
@@ -264,7 +265,7 @@ def claim_for_reply(view: ConversationViewBase, request: Request, conversation:
         ResourceScope(conversation.organization_id),
     )
     if conversation.assigned_operator_id != request.user.id and not manager_override:
-        return Response({"detail": "Диалог ведёт другой оператор"}, status=409)
+        return Response({"detail": t("conversations.handled_by_other")}, status=409)
     return conversation
 
 
@@ -284,7 +285,7 @@ class ConversationMessageView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         params = request.query_params
         limit = window_size(params, default=MESSAGE_WINDOW_SIZE)
         messages = conversation_messages(conversation)
@@ -313,12 +314,12 @@ class ConversationMessageView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         text = str(request.data.get("text", "")).strip()
         if not text:
-            return Response({"detail": "Пустое сообщение"}, status=400)
+            return Response({"detail": t("ai.empty_message")}, status=400)
         if conversation.lifecycle != LifecycleState.OPEN:
-            return Response({"detail": "Диалог закрыт"}, status=409)
+            return Response({"detail": t("conversations.closed")}, status=409)
         claimed = claim_for_reply(self, request, conversation)
         if isinstance(claimed, Response):
             return claimed
@@ -339,13 +340,13 @@ class ConversationRequestContactView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         if not conversation.contact_id or not conversation.connection_id:
-            return Response({"detail": "У диалога нет канала для запроса контакта"}, status=409)
+            return Response({"detail": t("conversations.no_channel_for_contact")}, status=409)
         if conversation.lifecycle != LifecycleState.OPEN:
-            return Response({"detail": "Диалог закрыт"}, status=409)
+            return Response({"detail": t("conversations.closed")}, status=409)
         if conversation.contact.phone:
-            return Response({"detail": "Контакт уже получен"}, status=409)
+            return Response({"detail": t("conversations.contact_already_received")}, status=409)
         try:
             message = request_contact(
                 context=request.tenant_context,
@@ -364,7 +365,7 @@ class ConversationCloseView(ConversationViewBase):
         try:
             self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         try:
             conversation = close_conversation(
                 context=request.tenant_context, conversation_id=conversation_id
@@ -390,7 +391,7 @@ class ConversationSpamView(ConversationViewBase):
         try:
             self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         try:
             conversation = mark_conversation_as_spam(
                 context=request.tenant_context, conversation_id=conversation_id
@@ -418,7 +419,7 @@ class ConversationGroupView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         group_id = request.data.get("groupId")
         group = None
         if group_id is not None:
@@ -426,7 +427,7 @@ class ConversationGroupView(ConversationViewBase):
                 organization_id=conversation.organization_id, id=group_id
             ).first()
             if group is None:
-                return Response({"detail": "Группа не найдена"}, status=400)
+                return Response({"detail": t("admin.group_not_found")}, status=400)
         conversation.group = group
         conversation.save(update_fields=["group"])
         self._audit(request, "group_changed", conversation)
@@ -448,7 +449,7 @@ class ConversationAssigneeView(ConversationViewBase):
         try:
             conversation = self._conversation(request, conversation_id, self.required_capability)
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         user_id = request.data.get("userId")
         assignee = None
         if user_id is not None:
@@ -462,7 +463,7 @@ class ConversationAssigneeView(ConversationViewBase):
                 .first()
             )
             if membership is None:
-                return Response({"detail": "Сотрудник не найден"}, status=400)
+                return Response({"detail": t("admin.employee_not_found")}, status=400)
             assignee = membership.user
         conversation.assigned_operator = assignee
         conversation.save(update_fields=["assigned_operator"])
diff --git a/apps/backend/chatballs/conversations/voice_views.py b/apps/backend/chatballs/conversations/voice_views.py
index 97f3da2..a4c6d55 100644
--- a/apps/backend/chatballs/conversations/voice_views.py
+++ b/apps/backend/chatballs/conversations/voice_views.py
@@ -29,6 +29,7 @@ from chatballs.conversations.models import (
 from chatballs.conversations.selectors import conversation_for_context
 from chatballs.conversations.serializers import message_payload
 from chatballs.conversations.view_base import ConversationViewBase
+from chatballs.i18n import t
 from chatballs.integrations.features import voice_messages_allowed
 from chatballs.tenancy.database import tenant_atomic
 
@@ -53,9 +54,9 @@ class MessageAudioView(ConversationViewBase):
         try:
             message = _visible_message(request, message_id)
         except (Message.DoesNotExist, Conversation.DoesNotExist):
-            return Response({"detail": "Сообщение не найдено"}, status=404)
+            return Response({"detail": t("conversations.message_not_found")}, status=404)
         if not message.audio:
-            return Response({"detail": "Аудио недоступно"}, status=404)
+            return Response({"detail": t("conversations.audio_unavailable")}, status=404)
         return FileResponse(
             message.audio.open("rb"),
             content_type=message.audio_content_type or "application/octet-stream",
@@ -86,9 +87,9 @@ class MessageTranscribeView(ConversationViewBase):
             try:
                 message = _visible_message(request, message_id)
             except (Message.DoesNotExist, Conversation.DoesNotExist):
-                return Response({"detail": "Сообщение не найдено"}, status=404)
+                return Response({"detail": t("conversations.message_not_found")}, status=404)
             if message.kind != MessageKind.VOICE or not message.audio:
-                return Response({"detail": "Это не голосовое сообщение"}, status=400)
+                return Response({"detail": t("conversations.not_a_voice_message")}, status=400)
             if message.transcript_status == TranscriptStatus.READY:
                 return Response({"message": message_payload(message)})
             try:
@@ -97,7 +98,7 @@ class MessageTranscribeView(ConversationViewBase):
                 mark_transcription_failed(message)
                 return Response({"detail": str(error)}, status=502)
             if job is None:
-                return Response({"detail": "Аудио недоступно"}, status=404)
+                return Response({"detail": t("conversations.audio_unavailable")}, status=404)
 
         try:
             transcript = run_transcription(job)
@@ -110,7 +111,7 @@ class MessageTranscribeView(ConversationViewBase):
             store_transcription(message, transcript)
             payload = message_payload(message)
         if not transcript:
-            return Response({"detail": "Провайдер вернул пустую расшифровку"}, status=502)
+            return Response({"detail": t("ai.empty_transcript")}, status=502)
         return Response({"message": payload})
 
 
@@ -129,24 +130,24 @@ class ConversationVoiceView(ConversationViewBase):
                 request, conversation_id, self.required_capability
             )
         except Conversation.DoesNotExist:
-            return Response({"detail": "Диалог не найден"}, status=404)
+            return Response({"detail": t("conversations.not_found")}, status=404)
         if conversation.lifecycle != LifecycleState.OPEN:
-            return Response({"detail": "Диалог закрыт"}, status=409)
+            return Response({"detail": t("conversations.closed")}, status=409)
         connection = conversation.connection
         if connection is None or not transports.supports_voice_send(connection):
             return Response(
-                {"detail": "Голосовые сообщения недоступны в этом канале"}, status=400
+                {"detail": t("conversations.voice_unavailable_channel")}, status=400
             )
         if not voice_messages_allowed(connection):
-            return Response({"detail": "Голосовые отключены для этой точки входа"}, status=400)
+            return Response({"detail": t("conversations.voice_off_entry_point")}, status=400)
         upload = request.FILES.get("audio")
         if upload is None:
-            return Response({"detail": "Прикрепите аудио"}, status=400)
+            return Response({"detail": t("conversations.attach_audio")}, status=400)
         if upload.size > MAX_VOICE_BYTES:
-            return Response({"detail": "Аудио больше 10 МБ"}, status=400)
+            return Response({"detail": t("conversations.audio_too_large")}, status=400)
         content_type = (upload.content_type or "audio/ogg").split(";")[0]
         if content_type not in ALLOWED_AUDIO_TYPES:
-            return Response({"detail": "Неподдерживаемый формат аудио"}, status=400)
+            return Response({"detail": t("conversations.audio_format_unsupported")}, status=400)
         try:
             duration = max(0, int(request.data.get("duration", 0)))
         except (TypeError, ValueError):
@@ -169,7 +170,7 @@ class ConversationVoiceView(ConversationViewBase):
         )
         if not sent:
             return Response(
-                {"detail": "Не удалось отправить голосовое в канал"}, status=502
+                {"detail": t("conversations.voice_send_failed")}, status=502
             )
         message = Message.objects.create(
             conversation=conversation,
diff --git a/apps/backend/chatballs/i18n/__init__.py b/apps/backend/chatballs/i18n/__init__.py
new file mode 100644
index 0000000..366f93f
--- /dev/null
+++ b/apps/backend/chatballs/i18n/__init__.py
@@ -0,0 +1,31 @@
+"""Язык интерфейса: выбор языка запроса и каталог сообщений."""
+
+from chatballs.i18n.catalog import current_language, t, tn
+from chatballs.i18n.languages import (
+    DEFAULT_LANGUAGE,
+    ENGLISH,
+    INHERIT,
+    LANGUAGE_CODES,
+    LANGUAGES,
+    RUSSIAN,
+    first_chosen,
+    normalize_language,
+    parse_accept_language,
+    resolve_language,
+)
+
+__all__ = [
+    "DEFAULT_LANGUAGE",
+    "ENGLISH",
+    "INHERIT",
+    "LANGUAGES",
+    "LANGUAGE_CODES",
+    "RUSSIAN",
+    "current_language",
+    "first_chosen",
+    "normalize_language",
+    "parse_accept_language",
+    "resolve_language",
+    "t",
+    "tn",
+]
diff --git a/apps/backend/chatballs/i18n/catalog.py b/apps/backend/chatballs/i18n/catalog.py
new file mode 100644
index 0000000..8e641d7
--- /dev/null
+++ b/apps/backend/chatballs/i18n/catalog.py
@@ -0,0 +1,97 @@
+"""Каталог сообщений и перевод строки под язык запроса.
+
+Переводы лежат обычными питоновскими словарями, а не в .po: продукт ставят
+одной командой из готового образа, и лишний бинарный шаг сборки (msgfmt) в этой
+цепочке нечем оправдать. Django и DRF свои строки при этом продолжают
+переводить штатно — язык запроса активируется через ``translation.activate``,
+и их скомпилированные каталоги подхватываются как обычно.
+
+Русский каталог — источник истины: ключ появляется сначала в нём. Английский
+обязан повторять его набор ключей один в один, это проверяется тестом, а не
+глазами. Пропущенный перевод не роняет запрос: строка выходит по-русски, и это
+видно, тогда как исключение в середине ответа не видно никому.
+"""
+
+from __future__ import annotations
+
+from typing import Final
+
+from django.utils.translation import get_language
+
+from chatballs.i18n.languages import DEFAULT_LANGUAGE, normalize_language
+from chatballs.i18n.messages import CATALOG
+
+# Форма множественного числа по правилам CLDR. Русскому нужны четыре («1 диалог»,
+# «2 диалога», «5 диалогов», «1,5 диалога»), английскому — две, и код, который
+# просто клеит «s», на русском не работает ни в одной строке.
+PluralForms = dict[str, str]
+Message = str | PluralForms
+
+_OTHER: Final = "other"
+
+
+def _plural_category(language: str, count: int | float) -> str:
+    if language == "ru":
+        if count != int(count):
+            return _OTHER
+        i = abs(int(count))
+        if i % 10 == 1 and i % 100 != 11:
+            return "one"
+        if i % 10 in (2, 3, 4) and i % 100 not in (12, 13, 14):
+            return "few"
+        return "many"
+    # Английский и всё, что добавят следом с двумя формами.
+    if count == 1 and count == int(count):
+        return "one"
+    return _OTHER
+
+
+def _lookup(key: str, language: str) -> Message | None:
+    table = CATALOG.get(language)
+    if table is not None and key in table:
+        return table[key]
+    if language != DEFAULT_LANGUAGE:
+        fallback = CATALOG.get(DEFAULT_LANGUAGE)
+        if fallback is not None and key in fallback:
+            return fallback[key]
+    return None
+
+
+def current_language() -> str:
+    """Язык, активированный для этого запроса (или язык по умолчанию)."""
+
+    return normalize_language(get_language()) or DEFAULT_LANGUAGE
+
+
+def t(key: str, /, language: str | None = None, **params: object) -> str:
+    """Строка каталога на языке запроса, с подстановкой ``{имя}``.
+
+    Неизвестный ключ возвращается как есть. Это заметно в интерфейсе, но не
+    ломает ответ: опечатка в ключе не должна превращать сохранение настроек в
+    пятисотую.
+    """
+
+    code = normalize_language(language) or current_language()
+    message = _lookup(key, code)
+    if message is None:
+        return key
+    if isinstance(message, dict):
+        message = message.get(_OTHER, key)
+    return message.format(**params) if params else message
+
+
+def tn(key: str, count: int | float, /, language: str | None = None, **params: object) -> str:
+    """Строка с числом: форма выбирается по правилам языка.
+
+    ``count`` подставляется в ``{count}`` без отдельного указания, потому что
+    строка с числом без самого числа не нужна ни разу.
+    """
+
+    code = normalize_language(language) or current_language()
+    message = _lookup(key, code)
+    if message is None:
+        return key
+    if isinstance(message, dict):
+        category = _plural_category(code, count)
+        message = message.get(category) or message.get(_OTHER) or key
+    return message.format(count=count, **params)
diff --git a/apps/backend/chatballs/i18n/languages.py b/apps/backend/chatballs/i18n/languages.py
new file mode 100644
index 0000000..fe35262
--- /dev/null
+++ b/apps/backend/chatballs/i18n/languages.py
@@ -0,0 +1,113 @@
+"""Языки интерфейса и правило, по которому запрос выбирает свой.
+
+Язык не выводится из окружения и не задаётся переменной: его выбирает человек.
+Владелец задаёт язык организации — на нём рабочее место открывается всем, кто
+в неё вошёл; отдельный сотрудник может переопределить его в профиле, и тогда
+организация ему не указ. До входа организации ещё нет, и язык берётся из
+настроек установки: на нём показываются логин, сброс пароля и мастер первого
+запуска.
+"""
+
+from __future__ import annotations
+
+from typing import Final
+
+RUSSIAN: Final = "ru"
+ENGLISH: Final = "en"
+
+# Порядок важен: первый язык — тот, на котором написан исходный каталог и на
+# который приходится фолбэк, когда перевода нет.
+LANGUAGES: Final[tuple[tuple[str, str], ...]] = (
+    (RUSSIAN, "Русский"),
+    (ENGLISH, "English"),
+)
+
+LANGUAGE_CODES: Final[tuple[str, ...]] = tuple(code for code, _ in LANGUAGES)
+DEFAULT_LANGUAGE: Final = RUSSIAN
+
+# Пустая строка в профиле сотрудника означает «как в организации», а в
+# организации — «как в установке». Это не язык, а отсутствие выбора, поэтому
+# отдельного значения в LANGUAGES у неё нет.
+INHERIT: Final = ""
+
+
+def normalize_language(value: object) -> str:
+    """Привести код к поддерживаемому языку или вернуть INHERIT.
+
+    Принимает и «ru-RU», и «RU», и «ru_ru»: браузер, операционная система и
+    заголовок Accept-Language пишут регион по-разному, а выбор один и тот же.
+    Неизвестный язык — не ошибка: это просьба, которую нечем удовлетворить, и
+    она сводится к «как выше по цепочке».
+    """
+
+    if not isinstance(value, str):
+        return INHERIT
+    code = value.strip().replace("_", "-").lower()
+    if not code:
+        return INHERIT
+    base = code.partition("-")[0]
+    return base if base in LANGUAGE_CODES else INHERIT
+
+
+def parse_accept_language(header: str | None) -> str:
+    """Первый поддерживаемый язык из Accept-Language, иначе INHERIT.
+
+    Заголовок разбирается по убыванию q-веса: «en;q=0.9, ru» означает русский,
+    хотя английский стоит первым.
+    """
+
+    if not header:
+        return INHERIT
+    weighted: list[tuple[float, int, str]] = []
+    for position, part in enumerate(header.split(",")):
+        token, _, params = part.strip().partition(";")
+        code = normalize_language(token)
+        if not code:
+            continue
+        quality = 1.0
+        for param in params.split(";"):
+            key, _, raw = param.strip().partition("=")
+            if key.strip() == "q":
+                try:
+                    quality = float(raw)
+                except ValueError:
+                    quality = 0.0
+        weighted.append((-quality, position, code))
+    if not weighted:
+        return INHERIT
+    weighted.sort()
+    return weighted[0][2]
+
+
+def first_chosen(*candidates: str) -> str:
+    """Первый уровень цепочки, который язык действительно выбрал.
+
+    Возвращает INHERIT, если не выбрал ни один: вызывающий по этому признаку
+    решает, спрашивать ли следующий уровень. Нужно там, где следующий уровень
+    стоит запроса к базе, — незачем его читать, если выбор уже сделан.
+    """
+
+    for candidate in candidates:
+        code = normalize_language(candidate)
+        if code:
+            return code
+    return INHERIT
+
+
+def resolve_language(
+    *,
+    user_language: str = INHERIT,
+    organization_language: str = INHERIT,
+    instance_language: str = INHERIT,
+    accept_language: str | None = None,
+) -> str:
+    """Язык одного запроса: от личного выбора к общему умолчанию.
+
+    Порядок фиксированный — профиль, организация, установка, браузер. Браузер
+    стоит последним и работает только до входа: после входа язык человека уже
+    известен, и подстраиваться под ноутбук, с которого он сегодня зашёл, не
+    нужно.
+    """
+
+    chosen = first_chosen(user_language, organization_language, instance_language)
+    return chosen or parse_accept_language(accept_language) or DEFAULT_LANGUAGE
diff --git a/apps/backend/chatballs/i18n/messages/__init__.py b/apps/backend/chatballs/i18n/messages/__init__.py
new file mode 100644
index 0000000..e91a95d
--- /dev/null
+++ b/apps/backend/chatballs/i18n/messages/__init__.py
@@ -0,0 +1,14 @@
+"""Сборка каталога: русский — источник истины, английский обязан его повторить.
+
+Ключ пишется как «модуль.смысл» и не повторяет саму фразу: строку правят чаще,
+чем переименовывают, и ключ вида «identity.email_taken» переживает
+переформулировку, а «identity.email_already_used» — нет.
+"""
+
+from __future__ import annotations
+
+from chatballs.i18n.messages import en, ru
+
+CATALOG: dict[str, dict[str, object]] = {"ru": ru.MESSAGES, "en": en.MESSAGES}
+
+__all__ = ["CATALOG"]
diff --git a/apps/backend/chatballs/i18n/messages/en.py b/apps/backend/chatballs/i18n/messages/en.py
new file mode 100644
index 0000000..3996ae9
--- /dev/null
+++ b/apps/backend/chatballs/i18n/messages/en.py
@@ -0,0 +1,304 @@
+"""English catalogue. Mirrors ru.py key for key (checked by tests)."""
+
+from __future__ import annotations
+
+MESSAGES: dict[str, object] = {
+    "admin.choose_logo_file": "Choose a logo file",
+    "admin.currency_rub_only": "Only the Russian rouble (RUB) is supported",
+    "admin.employee_not_found": "Operator not found",
+    "admin.group_name_taken": "A group with this name already exists",
+    "admin.group_not_found": "Group not found",
+    "admin.invalid_timezone": "Enter a valid time zone",
+    "admin.logo_not_uploaded": "No logo has been uploaded",
+    "admin.multi_org_self_reset": "This operator belongs to several organizations — they reset the password themselves through access recovery",
+    "admin.name_too_long": "The name must not exceed 255 characters",
+    "admin.organization_name_required": "Enter the organization name",
+    "admin.photo_not_found": "Photo not found",
+    "ai.agent_not_found": "Agent not found",
+    "ai.demo_no_transcription": "Voice transcription is not available on the demo provider: connect OpenRouter or a compatible provider under Settings.",
+    "ai.empty_message": "The message is empty",
+    "ai.empty_transcript": "The provider returned an empty transcript",
+    "ai.provider_not_configured": "No AI provider is configured: a call without a channel cannot pick an integration",
+    "api.window_needs_sort_key": "a window needs at least one sort key",
+    "calls.invite_invalid": "The invitation is not valid or has expired",
+    "calls.kind_audio": "audio call",
+    "calls.kind_invalid": "Unsupported call type",
+    "calls.kind_required": "Choose the call type",
+    "calls.kind_video": "video call",
+    "calls.not_found": "Call not found",
+    "calls.token_invalid": "The call access token is not valid or has expired",
+    "channels.binding_needs_manage": "Binding a connection requires integrations.manage",
+    "channels.cannot_delete_linked": "The channel cannot be deleted: it has related records",
+    "channels.no_rights_to_change": "No rights to change the channel",
+    "conversations.archive_admin_only": "The archive is available to administrators",
+    "conversations.attach_audio": "Attach audio",
+    "conversations.attach_file": "Attach a file",
+    "conversations.audio_format_unsupported": "Unsupported audio format",
+    "conversations.audio_too_large": "The audio is over 10 MB",
+    "conversations.audio_unavailable": "The audio is unavailable",
+    "conversations.closed": "The conversation is closed",
+    "conversations.contact_already_received": "The contact details have already been received",
+    "conversations.contact_name_empty": "The contact name cannot be empty",
+    "conversations.file_send_failed": "Could not send the file to the channel",
+    "conversations.file_too_large": "The file is larger than allowed",
+    "conversations.file_unavailable": "The file is unavailable",
+    "conversations.files_unavailable_channel": "Files are not available on this channel",
+    "conversations.guest": "Guest",
+    "conversations.handled_by_other": "Another operator is handling this conversation",
+    "conversations.invalid_colour": "Invalid colour",
+    "conversations.label_name_length": "Label name: 1-60 characters",
+    "conversations.label_not_found": "Label not found",
+    "conversations.message_not_found": "Message not found",
+    "conversations.no_channel_for_contact": "The conversation has no channel to request contact details through",
+    "conversations.no_contact": "The conversation has no contact",
+    "conversations.not_a_voice_message": "This is not a voice message",
+    "conversations.not_found": "Conversation not found",
+    "conversations.note_too_long": "The note is longer than 4000 characters",
+    "conversations.restore_admin_only": "Only an administrator can restore a conversation",
+    "conversations.system.ai_handed_over": "AI handed the conversation to an operator",
+    "conversations.system.ai_unavailable": "AI is unavailable — the conversation was handed to an operator",
+    "conversations.system.call_accepted": "The customer accepted the call invitation",
+    "conversations.system.call_cancelled": "The operator cancelled the call invitation",
+    "conversations.system.call_declined": "The customer declined the call invitation",
+    "conversations.system.call_ended": "Call ended · {duration}",
+    "conversations.system.call_expired": "The call invitation expired",
+    "conversations.system.call_failed": "The call did not go through",
+    "conversations.system.call_missed": "Call missed: the customer did not answer",
+    "conversations.system.call_requested": "{operator} requested {kind}",
+    "conversations.system.call_started": "The call started: the connection is up",
+    "conversations.system.operator_took": "{operator} took over the conversation",
+    "conversations.system.returned_to_ai": "The conversation was handed back to AI",
+    "conversations.system.returned_to_queue": "The conversation was returned to the queue",
+    "conversations.template_name_length": "Template name: 1-120 characters",
+    "conversations.template_name_taken": "A template with this name already exists",
+    "conversations.template_not_found": "Template not found",
+    "conversations.template_text_required": "The template text is required",
+    "conversations.unknown_label": "Unknown label",
+    "conversations.unknown_priority": "Unknown priority",
+    "conversations.voice_off_entry_point": "Voice messages are switched off for this entry point",
+    "conversations.voice_send_failed": "Could not send the voice message to the channel",
+    "conversations.voice_unavailable_channel": "Voice messages are not available on this channel",
+    "emails.initial_access_body": "Hello {name},\n\nA Chatballs account has been created for you. To set your first password, follow this link:\n{url}\n\nThe link is valid for 30 minutes. If you were not expecting this email, contact your organization's owner.",
+    "emails.initial_access_subject": "Your Chatballs access",
+    "emails.password_reset_body": "Hello {name},\n\nYou asked to reset your Chatballs password. To set a new one, follow this link:\n{url}\n\nThe link is valid for 30 minutes. If you did not ask for a reset, simply ignore this email.",
+    "emails.password_reset_subject": "Chatballs access recovery",
+    "identity.link_invalid_or_expired": "The link is not valid or has expired",
+    "identity.password_needs_digit": "The password must contain a digit.",
+    "identity.password_needs_letter": "The password must contain a letter.",
+    "identity.password_needs_special": "The password must contain a special character.",
+    "identity.setup_already_done": "The first run is already complete: the organization exists",
+    "notifications.ai_error": "AI error · {channel}",
+    "notifications.ai_handed_over": "AI handed over the conversation · {contact}",
+    "notifications.ai_unavailable_handed_over": "AI is temporarily unavailable; the conversation was handed to an operator",
+    "notifications.ai_unavailable_waiting": "AI is temporarily unavailable; the conversation is waiting for an answer",
+    "notifications.new_dialog": "New conversation · {channel}",
+    "notifications.new_dialog_body": "{contact} · {provider}: {preview}",
+    "notifications.new_message": "New message · {contact}",
+    "notifications.operator_needed": "An operator is needed · {contact}",
+    "notifications.voice_without_transcript": "A voice message without a transcript",
+    "portals.article_not_found": "Article not found",
+    "portals.file_field_required": "A file is required in the file field (multipart/form-data)",
+    "portals.file_not_found": "File not found",
+    "portals.helpful_must_be_boolean": "helpful must be a boolean",
+    "portals.invalid_article": "Invalid article",
+    "portals.invalid_article_data": "Invalid article data",
+    "portals.invalid_category": "Invalid category",
+    "portals.invalid_domain": "Invalid domain name",
+    "portals.invalid_pagination": "Invalid pagination",
+    "portals.invalid_revision": "Invalid revision",
+    "portals.invalid_section": "Invalid section",
+    "portals.not_found": "Portal not found",
+    "portals.section_not_found": "Section not found",
+    "profile.accent_hex": "The accent is a HEX colour like #1677ff",
+    "profile.choose_photo_file": "Choose a photo file",
+    "profile.link_not_found": "Link not found",
+    "profile.notification_bot_not_found": "Notification bot not found",
+    "profile.photo_not_set": "No photo is set",
+    "profile.totp_already_on": "TOTP is already on: turn it off with your current password first",
+    "profile.unknown_theme": "Unknown theme",
+    "sales.already_merged": "This contact is already merged with another — unmerge it first",
+    "sales.already_unmerged": "This merge has already been undone",
+    "sales.client_not_found": "Customer not found",
+    "sales.contact_not_found": "Contact not found",
+    "sales.merge_not_found": "Merge not found",
+    "sales.merge_owner_only": "Only the owner can merge contacts",
+    "sales.merge_reason_required": "Give a reason for the merge — it goes into the action log",
+    "sales.merge_self": "A contact cannot be merged with itself",
+    "settings.address_required": "Enter the installation address",
+    "settings.enable_s3_first": "Switch on and save S3 storage first",
+    "settings.entry_point_not_found": "Entry point not found",
+    "settings.http_or_https": "http or https",
+    "settings.integration_not_found": "Integration not found",
+    "settings.invalid_address": "Invalid address",
+    "settings.items_list_expected": "A list of items is expected",
+    "settings.language_unsupported": "This language is not supported",
+    "settings.migration_running": "A migration is already running",
+    "settings.port_is_number": "The port is a number",
+    "settings.s3_not_configured": "S3 is not configured",
+    "settings.smtp_required_first": "Set the outgoing mail server first",
+    "settings.socks_needs_pysocks": "A SOCKS proxy needs the PySocks dependency (pip install PySocks)",
+    "settings.storages_missing": "django-storages[s3] is not installed",
+    "settings.ttl_is_seconds": "The lifetime is a number of seconds",
+    "settings.unknown_storage_kind": "Unknown storage type",
+    "webchat.invalid_phone": "Invalid phone number",
+    "webchat.no_active_invite": "No active invitation found",
+    "webchat.session_not_found": "Session not found",
+    "webchat.voice_off": "Voice messages are switched off",
+    "webchat.widget_unavailable": "The widget is unavailable",
+    "webchat.write_in_max": "Write on MAX",
+    "webchat.write_in_telegram": "Write on Telegram",
+    "audit.action_access_assignment_created": "Access assigned to an operator",
+    "audit.action_administration_communication_updated": "Voice and calls changed",
+    "audit.action_administration_instance_updated": "Platform settings changed",
+    "audit.action_administration_logo_deleted": "Organization logo removed",
+    "audit.action_administration_logo_updated": "Organization logo changed",
+    "audit.action_administration_organization_updated": "Organization details changed",
+    "audit.action_administration_storage_migration_requested": "File migration started",
+    "audit.action_administration_storage_updated": "File storage changed",
+    "audit.action_ai_agent_category_knowledge_selected": "Category knowledge selected for an agent",
+    "audit.action_ai_agent_created": "Agent created",
+    "audit.action_ai_agent_knowledge_attached": "Knowledge attached to an agent",
+    "audit.action_ai_agent_knowledge_detached": "Knowledge detached from an agent",
+    "audit.action_ai_agent_portal_articles_attached": "Portal articles attached to an agent",
+    "audit.action_ai_agent_portal_articles_detached": "Portal articles detached from an agent",
+    "audit.action_ai_agent_status_changed": "Agent status changed",
+    "audit.action_ai_knowledge_attachment_added": "Knowledge attachment added",
+    "audit.action_ai_knowledge_attachment_deleted": "Knowledge attachment deleted",
+    "audit.action_ai_knowledge_category_created": "Knowledge category created",
+    "audit.action_ai_knowledge_category_deleted": "Knowledge category deleted",
+    "audit.action_ai_knowledge_category_updated": "Knowledge category changed",
+    "audit.action_ai_knowledge_created": "Knowledge item added",
+    "audit.action_ai_knowledge_deleted": "Knowledge item deleted",
+    "audit.action_ai_knowledge_imported": "Knowledge imported",
+    "audit.action_ai_knowledge_reindexed": "Knowledge item reindexed",
+    "audit.action_ai_knowledge_updated": "Knowledge item changed",
+    "audit.action_calls_cancelled": "Call cancelled",
+    "audit.action_calls_requested": "Call requested",
+    "audit.action_channels_channel_created": "Channel created",
+    "audit.action_channels_channel_deleted": "Channel deleted",
+    "audit.action_channels_channel_updated": "Channel changed",
+    "audit.action_channels_connection_bound": "Connection bound to an agent",
+    "audit.action_contacts_merged": "Contacts merged",
+    "audit.action_contacts_unmerged": "Contacts unmerged",
+    "audit.action_conversation_contact_updated": "Conversation contact changed",
+    "audit.action_conversations_archived": "Conversation moved to the archive",
+    "audit.action_conversations_assignee_changed": "Conversation assignee changed",
+    "audit.action_conversations_claimed": "Conversation taken",
+    "audit.action_conversations_closed": "Conversation closed",
+    "audit.action_conversations_contact_requested": "Customer contact details requested",
+    "audit.action_conversations_contact_updated": "Conversation contact changed",
+    "audit.action_conversations_file_sent": "File sent to the conversation",
+    "audit.action_conversations_group_changed": "Conversation group changed",
+    "audit.action_conversations_marked_spam": "Conversation marked as spam",
+    "audit.action_conversations_priority_changed": "Conversation priority changed",
+    "audit.action_conversations_released_to_ai": "Conversation handed back to AI",
+    "audit.action_conversations_returned_to_queue": "Conversation returned to the queue",
+    "audit.action_conversations_unarchived": "Conversation restored from the archive",
+    "audit.action_conversations_voice_sent": "Voice message sent to the conversation",
+    "audit.action_demo_install_requested": "Demo data installation requested",
+    "audit.action_demo_installed": "Demo data installed",
+    "audit.action_demo_installed_accounts": "Demo operator accounts created",
+    "audit.action_demo_remove_requested": "Demo data removal requested",
+    "audit.action_demo_removed": "Demo data removed",
+    "audit.action_identity_access_assignment_created": "Access assigned to an operator",
+    "audit.action_identity_access_assignment_revoked": "Operator access revoked",
+    "audit.action_identity_access_profile_created": "Access profile created",
+    "audit.action_identity_access_profile_updated": "Access profile changed",
+    "audit.action_identity_avatar_deleted": "Profile photo removed",
+    "audit.action_identity_avatar_updated": "Profile photo changed",
+    "audit.action_identity_employee_blocked": "Operator blocked",
+    "audit.action_identity_employee_created": "Operator added",
+    "audit.action_identity_employee_groups_changed": "Operator groups changed",
+    "audit.action_identity_employee_password_reset": "Operator password reset",
+    "audit.action_identity_employee_privileged_action_denied": "Privileged action denied",
+    "audit.action_identity_employee_role_changed": "Operator role changed",
+    "audit.action_identity_employee_sessions_terminated": "Operator sessions ended",
+    "audit.action_identity_employee_unblocked": "Operator unblocked",
+    "audit.action_identity_employee_updated": "Operator changed",
+    "audit.action_identity_group_created": "Group created",
+    "audit.action_identity_group_deleted": "Group deleted",
+    "audit.action_identity_group_updated": "Group changed",
+    "audit.action_identity_instance_setup_completed": "First-run wizard completed",
+    "audit.action_identity_login_failed": "Failed sign-in",
+    "audit.action_identity_login_succeeded": "Signed in",
+    "audit.action_identity_login_totp_required": "Two-factor code requested",
+    "audit.action_identity_logout": "Signed out",
+    "audit.action_identity_owner_bootstrapped": "Installation owner created",
+    "audit.action_identity_ownership_transferred": "Organization ownership transferred",
+    "audit.action_identity_password_reset_completed": "Password recovered",
+    "audit.action_identity_password_reset_failed": "Failed password reset",
+    "audit.action_identity_password_reset_requested": "Password reset requested",
+    "audit.action_identity_profile_language_changed": "Interface language changed",
+    "audit.action_identity_profile_password_changed": "Password changed",
+    "audit.action_identity_profile_sessions_revoked": "Own sessions ended",
+    "audit.action_identity_profile_totp_disabled": "Two-factor authentication turned off",
+    "audit.action_identity_profile_totp_setup_started": "Two-factor setup started",
+    "audit.action_identity_profile_updated": "Operator profile changed",
+    "audit.action_identity_temporary_password_changed": "Temporary password changed",
+    "audit.action_identity_totp_enabled": "Two-factor authentication turned on",
+    "audit.action_identity_totp_setup_failed": "Two-factor setup failed",
+    "audit.action_identity_totp_verify_failed": "Wrong two-factor code",
+    "audit.action_integrations_integration_created": "Integration added",
+    "audit.action_integrations_integration_deleted": "Integration deleted",
+    "audit.action_integrations_integration_updated": "Integration changed",
+    "audit.action_organization_owner_activated": "Organization owner activated",
+    "audit.action_organization_owner_invitation_requested": "Owner invitation sent",
+    "audit.action_organization_provisioned": "Organization created",
+    "audit.action_support_portal_articles_imported": "Portal articles imported",
+    "audit.action_support_portal_created": "Portal created",
+    "audit.action_support_portal_draft": "Portal unpublished",
+    "audit.action_support_portal_published": "Portal published",
+    "audit.category_access_assignment": "Access and operators",
+    "audit.category_administration": "Settings",
+    "audit.category_ai": "AI and knowledge",
+    "audit.category_calls": "Calls",
+    "audit.category_channels": "Channels",
+    "audit.category_contacts": "Contacts",
+    "audit.category_conversation": "Conversations",
+    "audit.category_conversations": "Conversations",
+    "audit.category_demo": "Demo data",
+    "audit.category_identity": "Access and operators",
+    "audit.category_integrations": "Integrations",
+    "audit.category_organization": "Organization",
+    "audit.category_support_portal": "Portals",
+    "audit.object_accessassignment": "Access assignment",
+    "audit.object_accessprofile": "Access profile",
+    "audit.object_agentcard": "Agent",
+    "audit.object_channel": "Channel",
+    "audit.object_contact": "Contact",
+    "audit.object_conversation": "Conversation",
+    "audit.object_employeegroup": "Group",
+    "audit.object_humanuser": "Operator",
+    "audit.object_instancesettings": "Installation",
+    "audit.object_integration": "Integration",
+    "audit.object_knowledge": "Knowledge item",
+    "audit.object_knowledgecategory": "Knowledge category",
+    "audit.object_organization": "Organization",
+    "audit.object_storagesettings": "Storage",
+    "audit.object_supportportal": "Portal",
+    "audit.result_denied": "Denied",
+    "audit.result_failed": "Failed",
+    "audit.result_success": "Succeeded",
+    "audit.category_other": "Other",
+    "audit.result_unknown": "Unknown",
+    "ai.agent_code_collision": "Could not find a unique agent code",
+    "ai.pick_provider_first": "Pick the organization's provider to start AI",
+    "calls.already_ended": "The call has already ended",
+    "calls.cannot_cancel": "The call can no longer be cancelled",
+    "calls.conversation_outside_groups": "The conversation is outside the operator's groups",
+    "calls.conversation_taken": "Another operator is already handling this conversation",
+    "calls.identity_missing_or_ambiguous": "The call's customer identity is missing or ambiguous",
+    "calls.invite_cannot_accept": "The invitation can no longer be accepted",
+    "calls.invite_cannot_decline": "The invitation can no longer be declined",
+    "calls.no_access": "No access to calls",
+    "calls.no_client_identity": "The conversation has no customer identity to call",
+    "calls.not_a_participant": "The operator is not a participant of this call",
+    "calls.only_in_open_conversation": "A call can only be requested in an open conversation",
+    "calls.operator_busy": "The operator is already on another call",
+    "calls.operator_context_required": "A call needs an operator context",
+    "calls.second_call_rejected": "A second unfinished call could not be created",
+    "calls.transition_forbidden": "Transition {current} -> {target} is not allowed",
+    "calls.unfinished_call_exists": "The conversation already has an unfinished call",
+    "channels.no_active_agent": "The channel has no active AI agent",
+    "conversations.unavailable": "The conversation is unavailable",
+}
diff --git a/apps/backend/chatballs/i18n/messages/ru.py b/apps/backend/chatballs/i18n/messages/ru.py
new file mode 100644
index 0000000..a5789d8
--- /dev/null
+++ b/apps/backend/chatballs/i18n/messages/ru.py
@@ -0,0 +1,308 @@
+"""Русский каталог — исходный. Ключ появляется здесь, потом в en.py.
+
+Ключи сгруппированы по модулю, которому принадлежит строка, и внутри группы
+идут по алфавиту: искать строку приходится по коду, а не по фразе.
+"""
+
+from __future__ import annotations
+
+MESSAGES: dict[str, object] = {
+    "admin.choose_logo_file": "Выберите файл логотипа",
+    "admin.currency_rub_only": "Поддерживается только российский рубль (RUB)",
+    "admin.employee_not_found": "Сотрудник не найден",
+    "admin.group_name_taken": "Группа с таким именем уже есть",
+    "admin.group_not_found": "Группа не найдена",
+    "admin.invalid_timezone": "Укажите корректный часовой пояс",
+    "admin.logo_not_uploaded": "Логотип не загружен",
+    "admin.multi_org_self_reset": "Сотрудник состоит в нескольких организациях — пароль сбрасывает он сам через восстановление доступа",
+    "admin.name_too_long": "Название не должно превышать 255 символов",
+    "admin.organization_name_required": "Укажите название организации",
+    "admin.photo_not_found": "Фото не найдено",
+    "ai.agent_not_found": "Агент не найден",
+    "ai.demo_no_transcription": "Расшифровка голосовых недоступна в демо-провайдере: подключите OpenRouter или совместимый провайдер в «Настройках».",
+    "ai.empty_message": "Пустое сообщение",
+    "ai.empty_transcript": "Провайдер вернул пустую расшифровку",
+    "ai.provider_not_configured": "AI-провайдер не настроен: вызов без канала не может выбрать интеграцию",
+    "api.window_needs_sort_key": "окно требует хотя бы один ключ сортировки",
+    "calls.invite_invalid": "Недействительное или истёкшее приглашение",
+    "calls.kind_audio": "аудиозвонок",
+    "calls.kind_invalid": "Недопустимый тип звонка",
+    "calls.kind_required": "Укажите тип звонка",
+    "calls.kind_video": "видеозвонок",
+    "calls.not_found": "Звонок не найден",
+    "calls.token_invalid": "Недействительный или истёкший call access token",
+    "channels.binding_needs_manage": "Привязка подключения требует integrations.manage",
+    "channels.cannot_delete_linked": "Канал нельзя удалить: есть связанные записи",
+    "channels.no_rights_to_change": "Нет прав на изменение канала",
+    "conversations.archive_admin_only": "Архив доступен администраторам",
+    "conversations.attach_audio": "Прикрепите аудио",
+    "conversations.attach_file": "Прикрепите файл",
+    "conversations.audio_format_unsupported": "Неподдерживаемый формат аудио",
+    "conversations.audio_too_large": "Аудио больше 10 МБ",
+    "conversations.audio_unavailable": "Аудио недоступно",
+    "conversations.closed": "Диалог закрыт",
+    "conversations.contact_already_received": "Контакт уже получен",
+    "conversations.contact_name_empty": "Имя контакта не может быть пустым",
+    "conversations.file_send_failed": "Не удалось отправить файл в канал",
+    "conversations.file_too_large": "Файл больше допустимого размера",
+    "conversations.file_unavailable": "Файл недоступен",
+    "conversations.files_unavailable_channel": "Файлы недоступны в этом канале",
+    "conversations.guest": "Гость",
+    "conversations.handled_by_other": "Диалог ведёт другой оператор",
+    "conversations.invalid_colour": "Некорректный цвет",
+    "conversations.label_name_length": "Название метки: 1-60 символов",
+    "conversations.label_not_found": "Метка не найдена",
+    "conversations.message_not_found": "Сообщение не найдено",
+    "conversations.no_channel_for_contact": "У диалога нет канала для запроса контакта",
+    "conversations.no_contact": "У диалога нет контакта",
+    "conversations.not_a_voice_message": "Это не голосовое сообщение",
+    "conversations.not_found": "Диалог не найден",
+    "conversations.note_too_long": "Заметка длиннее 4000 символов",
+    "conversations.restore_admin_only": "Восстановить диалог может только администратор",
+    "conversations.system.ai_handed_over": "AI передал диалог оператору",
+    "conversations.system.ai_unavailable": "AI недоступен — диалог передан оператору",
+    "conversations.system.call_accepted": "Клиент принял приглашение на звонок",
+    "conversations.system.call_cancelled": "Сотрудник отменил приглашение на звонок",
+    "conversations.system.call_declined": "Клиент отклонил приглашение на звонок",
+    "conversations.system.call_ended": "Звонок завершён · {duration}",
+    "conversations.system.call_expired": "Приглашение на звонок истекло",
+    "conversations.system.call_failed": "Звонок не состоялся",
+    "conversations.system.call_missed": "Звонок пропущен: клиент не ответил",
+    "conversations.system.call_requested": "Оператор {operator} запросил {kind}",
+    "conversations.system.call_started": "Звонок начался: соединение установлено",
+    "conversations.system.operator_took": "Оператор {operator} перехватил диалог",
+    "conversations.system.returned_to_ai": "Диалог возвращён AI",
+    "conversations.system.returned_to_queue": "Диалог возвращён в очередь",
+    "conversations.template_name_length": "Название шаблона: 1-120 символов",
+    "conversations.template_name_taken": "Шаблон с таким названием уже есть",
+    "conversations.template_not_found": "Шаблон не найден",
+    "conversations.template_text_required": "Текст шаблона обязателен",
+    "conversations.unknown_label": "Неизвестная метка",
+    "conversations.unknown_priority": "Неизвестный приоритет",
+    "conversations.voice_off_entry_point": "Голосовые отключены для этой точки входа",
+    "conversations.voice_send_failed": "Не удалось отправить голосовое в канал",
+    "conversations.voice_unavailable_channel": "Голосовые сообщения недоступны в этом канале",
+    "emails.initial_access_body": "Здравствуйте, {name}.\n\nДля вас создана учётная запись Chatballs. Чтобы задать пароль первичного доступа, перейдите по ссылке:\n{url}\n\nСсылка действует 30 минут. Если вы не ожидали это письмо, обратитесь к владельцу организации.",
+    "emails.initial_access_subject": "Первичный доступ к Chatballs",
+    "emails.password_reset_body": "Здравствуйте, {name}.\n\nВы запросили сброс пароля для Chatballs. Чтобы задать новый пароль, перейдите по ссылке:\n{url}\n\nСсылка действует 30 минут. Если вы не запрашивали сброс, просто проигнорируйте это письмо.",
+    "emails.password_reset_subject": "Восстановление доступа к Chatballs",
+    "identity.link_invalid_or_expired": "Ссылка недействительна или истекла",
+    "identity.password_needs_digit": "Пароль должен содержать цифру.",
+    "identity.password_needs_letter": "Пароль должен содержать букву.",
+    "identity.password_needs_special": "Пароль должен содержать спецсимвол.",
+    "identity.setup_already_done": "Первый запуск уже выполнен: организация создана",
+    "notifications.ai_error": "Ошибка AI · {channel}",
+    "notifications.ai_handed_over": "AI передал диалог · {contact}",
+    "notifications.ai_unavailable_handed_over": "AI временно недоступен, диалог передан оператору",
+    "notifications.ai_unavailable_waiting": "AI временно недоступен, диалог ждёт ответа",
+    "notifications.new_dialog": "Новый диалог · {channel}",
+    "notifications.new_dialog_body": "{contact} · {provider}: {preview}",
+    "notifications.new_message": "Новое сообщение · {contact}",
+    "notifications.operator_needed": "Нужен оператор · {contact}",
+    "notifications.voice_without_transcript": "Голосовое без расшифровки",
+    "portals.article_not_found": "Статья не найдена",
+    "portals.file_field_required": "Нужен файл в поле file (multipart/form-data)",
+    "portals.file_not_found": "Файл не найден",
+    "portals.helpful_must_be_boolean": "helpful должен быть boolean",
+    "portals.invalid_article": "Некорректная статья",
+    "portals.invalid_article_data": "Некорректные данные статьи",
+    "portals.invalid_category": "Некорректная категория",
+    "portals.invalid_domain": "Некорректное доменное имя",
+    "portals.invalid_pagination": "Некорректная пагинация",
+    "portals.invalid_revision": "Некорректная версия",
+    "portals.invalid_section": "Некорректный раздел",
+    "portals.not_found": "Портал не найден",
+    "portals.section_not_found": "Раздел не найден",
+    "profile.accent_hex": "Акцент — HEX-цвет вида #1677ff",
+    "profile.choose_photo_file": "Выберите файл фото",
+    "profile.link_not_found": "Привязка не найдена",
+    "profile.notification_bot_not_found": "Бот уведомлений не найден",
+    "profile.photo_not_set": "Фото не задано",
+    "profile.totp_already_on": "TOTP уже включена: сначала отключите её текущим паролем",
+    "profile.unknown_theme": "Неизвестная тема",
+    "sales.already_merged": "Контакт уже объединён с другим — сначала разъедините",
+    "sales.already_unmerged": "Это объединение уже разъединено",
+    "sales.client_not_found": "Клиент не найден",
+    "sales.contact_not_found": "Контакт не найден",
+    "sales.merge_not_found": "Объединение не найдено",
+    "sales.merge_owner_only": "Объединять контакты может только владелец",
+    "sales.merge_reason_required": "Укажите причину объединения — она попадёт в журнал действий",
+    "sales.merge_self": "Нельзя объединить контакт с самим собой",
+    "settings.address_required": "Укажите адрес установки",
+    "settings.enable_s3_first": "Сначала включите и сохраните S3-хранилище",
+    "settings.entry_point_not_found": "Точка входа не найдена",
+    "settings.http_or_https": "http или https",
+    "settings.integration_not_found": "Интеграция не найдена",
+    "settings.invalid_address": "Некорректный адрес",
+    "settings.items_list_expected": "Ожидается список items",
+    "settings.language_unsupported": "Этот язык не поддерживается",
+    "settings.migration_running": "Перенос уже идёт",
+    "settings.port_is_number": "Порт — число",
+    "settings.s3_not_configured": "S3 не настроено",
+    "settings.smtp_required_first": "Сначала укажите сервер исходящей почты",
+    "settings.socks_needs_pysocks": "Для SOCKS-прокси нужна зависимость PySocks (pip install PySocks)",
+    "settings.storages_missing": "django-storages[s3] не установлен",
+    "settings.ttl_is_seconds": "Время жизни — число секунд",
+    "settings.unknown_storage_kind": "Неизвестный тип хранилища",
+    "webchat.invalid_phone": "Некорректный номер телефона",
+    "webchat.no_active_invite": "Активное приглашение не найдено",
+    "webchat.session_not_found": "Сессия не найдена",
+    "webchat.voice_off": "Голосовые отключены",
+    "webchat.widget_unavailable": "Виджет недоступен",
+    "webchat.write_in_max": "Написать в MAX",
+    "webchat.write_in_telegram": "Написать в Telegram",
+    "audit.action_access_assignment_created": "Назначен доступ сотруднику",
+    "audit.action_administration_communication_updated": "Изменены голосовые и звонки",
+    "audit.action_administration_instance_updated": "Изменены настройки платформы",
+    "audit.action_administration_logo_deleted": "Удалён логотип организации",
+    "audit.action_administration_logo_updated": "Изменён логотип организации",
+    "audit.action_administration_organization_updated": "Изменены данные организации",
+    "audit.action_administration_storage_migration_requested": "Запущен перенос файлов",
+    "audit.action_administration_storage_updated": "Изменено хранилище файлов",
+    "audit.action_ai_agent_category_knowledge_selected": "Выбраны знания категории для агента",
+    "audit.action_ai_agent_created": "Создан агент",
+    "audit.action_ai_agent_knowledge_attached": "Знания подключены к агенту",
+    "audit.action_ai_agent_knowledge_detached": "Знания отключены от агента",
+    "audit.action_ai_agent_portal_articles_attached": "Статьи портала подключены к агенту",
+    "audit.action_ai_agent_portal_articles_detached": "Статьи портала отключены от агента",
+    "audit.action_ai_agent_status_changed": "Изменён статус агента",
+    "audit.action_ai_knowledge_attachment_added": "Добавлено вложение знания",
+    "audit.action_ai_knowledge_attachment_deleted": "Удалено вложение знания",
+    "audit.action_ai_knowledge_category_created": "Создана категория знаний",
+    "audit.action_ai_knowledge_category_deleted": "Удалена категория знаний",
+    "audit.action_ai_knowledge_category_updated": "Изменена категория знаний",
+    "audit.action_ai_knowledge_created": "Добавлено знание",
+    "audit.action_ai_knowledge_deleted": "Удалено знание",
+    "audit.action_ai_knowledge_imported": "Знания импортированы",
+    "audit.action_ai_knowledge_reindexed": "Знание переиндексировано",
+    "audit.action_ai_knowledge_updated": "Изменено знание",
+    "audit.action_calls_cancelled": "Звонок отменён",
+    "audit.action_calls_requested": "Запрошен звонок",
+    "audit.action_channels_channel_created": "Создан канал",
+    "audit.action_channels_channel_deleted": "Удалён канал",
+    "audit.action_channels_channel_updated": "Изменён канал",
+    "audit.action_channels_connection_bound": "Подключение привязано к агенту",
+    "audit.action_contacts_merged": "Объединение контактов",
+    "audit.action_contacts_unmerged": "Разъединение контактов",
+    "audit.action_conversation_contact_updated": "Изменён контакт диалога",
+    "audit.action_conversations_archived": "Диалог отправлен в архив",
+    "audit.action_conversations_assignee_changed": "Изменён ответственный за диалог",
+    "audit.action_conversations_claimed": "Диалог взят в работу",
+    "audit.action_conversations_closed": "Диалог закрыт",
+    "audit.action_conversations_contact_requested": "Запрошены контакты клиента",
+    "audit.action_conversations_contact_updated": "Изменён контакт диалога",
+    "audit.action_conversations_file_sent": "Отправлен файл в диалог",
+    "audit.action_conversations_group_changed": "Изменена группа диалога",
+    "audit.action_conversations_marked_spam": "Диалог помечен спамом",
+    "audit.action_conversations_priority_changed": "Изменён приоритет диалога",
+    "audit.action_conversations_released_to_ai": "Диалог возвращён AI",
+    "audit.action_conversations_returned_to_queue": "Диалог возвращён в очередь",
+    "audit.action_conversations_unarchived": "Диалог возвращён из архива",
+    "audit.action_conversations_voice_sent": "Отправлено голосовое в диалог",
+    "audit.action_demo_install_requested": "Запрошена установка демо-данных",
+    "audit.action_demo_installed": "Демо-данные установлены",
+    "audit.action_demo_installed_accounts": "Созданы учётные записи демо-сотрудников",
+    "audit.action_demo_remove_requested": "Запрошено удаление демо-данных",
+    "audit.action_demo_removed": "Демо-данные удалены",
+    "audit.action_identity_access_assignment_created": "Назначен доступ сотруднику",
+    "audit.action_identity_access_assignment_revoked": "Отозван доступ сотрудника",
+    "audit.action_identity_access_profile_created": "Создан профиль доступа",
+    "audit.action_identity_access_profile_updated": "Изменён профиль доступа",
+    "audit.action_identity_avatar_deleted": "Удалено фото профиля",
+    "audit.action_identity_avatar_updated": "Изменено фото профиля",
+    "audit.action_identity_employee_blocked": "Сотрудник заблокирован",
+    "audit.action_identity_employee_created": "Добавлен сотрудник",
+    "audit.action_identity_employee_groups_changed": "Изменены группы сотрудника",
+    "audit.action_identity_employee_password_reset": "Сброшен пароль сотрудника",
+    "audit.action_identity_employee_privileged_action_denied": "Отказано в привилегированном действии",
+    "audit.action_identity_employee_role_changed": "Изменена роль сотрудника",
+    "audit.action_identity_employee_sessions_terminated": "Завершены сессии сотрудника",
+    "audit.action_identity_employee_unblocked": "Сотрудник разблокирован",
+    "audit.action_identity_employee_updated": "Изменён сотрудник",
+    "audit.action_identity_group_created": "Создана группа",
+    "audit.action_identity_group_deleted": "Удалена группа",
+    "audit.action_identity_group_updated": "Изменена группа",
+    "audit.action_identity_instance_setup_completed": "Пройден мастер первого запуска",
+    "audit.action_identity_login_failed": "Неудачный вход",
+    "audit.action_identity_login_succeeded": "Вход в систему",
+    "audit.action_identity_login_totp_required": "Запрошен код двухфакторной проверки",
+    "audit.action_identity_logout": "Выход из системы",
+    "audit.action_identity_owner_bootstrapped": "Создан владелец установки",
+    "audit.action_identity_ownership_transferred": "Передано владение организацией",
+    "audit.action_identity_password_reset_completed": "Пароль восстановлен",
+    "audit.action_identity_password_reset_failed": "Неудачный сброс пароля",
+    "audit.action_identity_password_reset_requested": "Запрошен сброс пароля",
+    "audit.action_identity_profile_language_changed": "Изменён язык интерфейса",
+    "audit.action_identity_profile_password_changed": "Изменён пароль",
+    "audit.action_identity_profile_sessions_revoked": "Завершены свои сессии",
+    "audit.action_identity_profile_totp_disabled": "Отключена двухфакторная проверка",
+    "audit.action_identity_profile_totp_setup_started": "Начата настройка двухфакторной проверки",
+    "audit.action_identity_profile_updated": "Изменён профиль сотрудника",
+    "audit.action_identity_temporary_password_changed": "Сменён временный пароль",
+    "audit.action_identity_totp_enabled": "Включена двухфакторная проверка",
+    "audit.action_identity_totp_setup_failed": "Ошибка настройки двухфакторной проверки",
+    "audit.action_identity_totp_verify_failed": "Неверный код двухфакторной проверки",
+    "audit.action_integrations_integration_created": "Добавлена интеграция",
+    "audit.action_integrations_integration_deleted": "Удалена интеграция",
+    "audit.action_integrations_integration_updated": "Изменена интеграция",
+    "audit.action_organization_owner_activated": "Активирован владелец организации",
+    "audit.action_organization_owner_invitation_requested": "Отправлено приглашение владельцу",
+    "audit.action_organization_provisioned": "Создана организация",
+    "audit.action_support_portal_articles_imported": "Импортированы статьи портала",
+    "audit.action_support_portal_created": "Создан портал",
+    "audit.action_support_portal_draft": "Портал снят с публикации",
+    "audit.action_support_portal_published": "Портал опубликован",
+    "audit.category_access_assignment": "Доступ и сотрудники",
+    "audit.category_administration": "Настройки",
+    "audit.category_ai": "AI и знания",
+    "audit.category_calls": "Звонки",
+    "audit.category_channels": "Каналы",
+    "audit.category_contacts": "Контакты",
+    "audit.category_conversation": "Диалоги",
+    "audit.category_conversations": "Диалоги",
+    "audit.category_demo": "Демо-данные",
+    "audit.category_identity": "Доступ и сотрудники",
+    "audit.category_integrations": "Интеграции",
+    "audit.category_organization": "Организация",
+    "audit.category_support_portal": "Порталы",
+    "audit.object_accessassignment": "Назначение доступа",
+    "audit.object_accessprofile": "Профиль доступа",
+    "audit.object_agentcard": "Агент",
+    "audit.object_channel": "Канал",
+    "audit.object_contact": "Контакт",
+    "audit.object_conversation": "Диалог",
+    "audit.object_employeegroup": "Группа",
+    "audit.object_humanuser": "Сотрудник",
+    "audit.object_instancesettings": "Установка",
+    "audit.object_integration": "Интеграция",
+    "audit.object_knowledge": "Знание",
+    "audit.object_knowledgecategory": "Категория знаний",
+    "audit.object_organization": "Организация",
+    "audit.object_storagesettings": "Хранилище",
+    "audit.object_supportportal": "Портал",
+    "audit.result_denied": "Отклонено",
+    "audit.result_failed": "Ошибка",
+    "audit.result_success": "Выполнено",
+    "audit.category_other": "Прочее",
+    "audit.result_unknown": "Неизвестно",
+    "ai.agent_code_collision": "Не удалось подобрать уникальный код агента",
+    "ai.pick_provider_first": "Для запуска AI выберите провайдера организации",
+    "calls.already_ended": "Звонок уже завершён",
+    "calls.cannot_cancel": "Звонок уже нельзя отменить",
+    "calls.conversation_outside_groups": "Диалог вне групп сотрудника",
+    "calls.conversation_taken": "Диалог уже ведёт другой оператор",
+    "calls.identity_missing_or_ambiguous": "Клиентская identity звонка отсутствует или неоднозначна",
+    "calls.invite_cannot_accept": "Приглашение уже нельзя принять",
+    "calls.invite_cannot_decline": "Приглашение уже нельзя отклонить",
+    "calls.no_access": "Нет доступа к звонкам",
+    "calls.no_client_identity": "У диалога нет клиентской identity для звонка",
+    "calls.not_a_participant": "Сотрудник не является участником звонка",
+    "calls.only_in_open_conversation": "Звонок можно запросить только в открытом диалоге",
+    "calls.operator_busy": "Сотрудник уже участвует в другом звонке",
+    "calls.operator_context_required": "Для звонка требуется контекст сотрудника",
+    "calls.second_call_rejected": "Не удалось создать второй незавершённый звонок",
+    "calls.transition_forbidden": "Переход {current} -> {target} запрещён",
+    "calls.unfinished_call_exists": "В диалоге уже есть незавершённый звонок",
+    "channels.no_active_agent": "У канала нет активного AI-агента",
+    "conversations.unavailable": "Диалог недоступен",
+}
diff --git a/apps/backend/chatballs/i18n/middleware.py b/apps/backend/chatballs/i18n/middleware.py
new file mode 100644
index 0000000..fd31581
--- /dev/null
+++ b/apps/backend/chatballs/i18n/middleware.py
@@ -0,0 +1,62 @@
+"""Активация языка на время одного запроса.
+
+Стоит последней в цепочке — ближе всех к вьюхе, — потому что организацию
+запроса определяет ``TenantContextMiddleware``, и до неё язык организации ещё
+неизвестен. Активируется штатный механизм Django: от него зависят и наш
+каталог, и сообщения DRF о невалидных полях.
+"""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+
+from django.http import HttpRequest, HttpResponse
+from django.utils import translation
+
+from chatballs.i18n.languages import INHERIT, first_chosen, resolve_language
+
+
+class LanguageMiddleware:
+    def __init__(self, get_response: Callable[[HttpRequest], HttpResponse]) -> None:
+        self.get_response = get_response
+
+    def __call__(self, request: HttpRequest) -> HttpResponse:
+        # Язык установки спрашивается последним и только если до него дошло:
+        # это чтение из базы, и запросу сотрудника со своим языком (или из
+        # организации со своим) оно не нужно вовсе.
+        language = first_chosen(
+            self._user_language(request), self._organization_language(request)
+        ) or resolve_language(
+            instance_language=self._instance_language(),
+            accept_language=request.headers.get("Accept-Language"),
+        )
+        with translation.override(language):
+            request.LANGUAGE_CODE = language
+            response = self.get_response(request)
+        # Заголовок нужен кэшам и прокси: один и тот же URL отдаёт разный текст
+        # для разных людей, и без Vary ответ одного уедет другому.
+        response.setdefault("Content-Language", language)
+        existing = response.get("Vary", "")
+        if "accept-language" not in existing.lower():
+            response["Vary"] = f"{existing}, Accept-Language".lstrip(", ")
+        return response
+
+    @staticmethod
+    def _user_language(request: HttpRequest) -> str:
+        user = getattr(request, "user", None)
+        if user is None or not user.is_authenticated:
+            return INHERIT
+        return getattr(user, "ui_language", INHERIT) or INHERIT
+
+    @staticmethod
+    def _organization_language(request: HttpRequest) -> str:
+        context = getattr(request, "tenant_context", None)
+        if context is None:
+            return INHERIT
+        return getattr(context.organization, "language", INHERIT) or INHERIT
+
+    @staticmethod
+    def _instance_language() -> str:
+        from chatballs.identity.instance_settings import default_language
+
+        return default_language()
diff --git a/apps/backend/chatballs/i18n/tests.py b/apps/backend/chatballs/i18n/tests.py
new file mode 100644
index 0000000..a7c2880
--- /dev/null
+++ b/apps/backend/chatballs/i18n/tests.py
@@ -0,0 +1,127 @@
+"""Проверки языка интерфейса.
+
+Главная из них — совпадение наборов ключей в каталогах. Пропущенный перевод не
+роняет запрос (строка выходит по-русски), и именно поэтому его легко не
+заметить: без теста английский каталог отстаёт молча.
+"""
+
+from __future__ import annotations
+
+import pathlib
+import re
+
+from django.test import SimpleTestCase, TestCase, override_settings
+
+from chatballs.i18n import normalize_language, parse_accept_language, resolve_language, t
+from chatballs.i18n.catalog import _plural_category
+from chatballs.i18n.languages import DEFAULT_LANGUAGE, LANGUAGE_CODES
+from chatballs.i18n.messages import CATALOG
+
+
+class CatalogTests(SimpleTestCase):
+    def test_every_language_has_the_same_keys(self) -> None:
+        russian = set(CATALOG["ru"])
+        for code, table in CATALOG.items():
+            if code == DEFAULT_LANGUAGE:
+                continue
+            self.assertEqual(
+                russian - set(table), set(), f"нет перевода на {code}"
+            )
+            self.assertEqual(
+                set(table) - russian, set(), f"лишние ключи в {code}"
+            )
+
+    def test_placeholders_match_between_languages(self) -> None:
+        """Параметры фразы обязаны совпадать: иначе подстановка молча потеряется."""
+
+        placeholders = re.compile(r"\{(\w+)\}")
+
+        def names(message: object) -> set[str]:
+            if isinstance(message, dict):
+                return {n for form in message.values() for n in placeholders.findall(form)}
+            return set(placeholders.findall(str(message)))
+
+        for key, russian in CATALOG["ru"].items():
+            for code, table in CATALOG.items():
+                if code == DEFAULT_LANGUAGE:
+                    continue
+                self.assertEqual(
+                    names(russian), names(table[key]), f"{key}: расходятся параметры в {code}"
+                )
+
+    def test_unknown_key_returns_itself(self) -> None:
+        self.assertEqual(t("нет.такого.ключа"), "нет.такого.ключа")
+
+    def test_plural_rule_follows_the_language(self) -> None:
+        """Форма выбирается по правилам CLDR, а не по «1 — единственное».
+
+        Строк с числом в каталоге бэкенда сейчас нет, и проверять нечего, кроме
+        самого правила: русскому нужны четыре формы, английскому — две, и
+        ошибка здесь всплыла бы на первой же фразе со счётчиком.
+        """
+
+        self.assertEqual([_plural_category("ru", n) for n in (1, 2, 5, 11, 21)],
+                         ["one", "few", "many", "many", "one"])
+        self.assertEqual([_plural_category("en", n) for n in (1, 2)], ["one", "other"])
+
+
+class LanguageResolutionTests(SimpleTestCase):
+    def test_normalize_accepts_region_and_case(self) -> None:
+        self.assertEqual(normalize_language("ru-RU"), "ru")
+        self.assertEqual(normalize_language("EN"), "en")
+        self.assertEqual(normalize_language("ru_ru"), "ru")
+
+    def test_unknown_language_is_not_a_choice(self) -> None:
+        # Не ошибка, а «выбора нет»: запрос сводится к языку выше по цепочке.
+        self.assertEqual(normalize_language("de"), "")
+        self.assertEqual(normalize_language(None), "")
+
+    def test_accept_language_respects_quality(self) -> None:
+        self.assertEqual(parse_accept_language("en;q=0.9, ru"), "ru")
+        self.assertEqual(parse_accept_language("en-GB,en;q=0.9"), "en")
+        self.assertEqual(parse_accept_language("de,fr;q=0.5"), "")
+
+    def test_personal_choice_beats_organization(self) -> None:
+        self.assertEqual(
+            resolve_language(user_language="en", organization_language="ru"), "en"
+        )
+
+    def test_organization_beats_installation(self) -> None:
+        self.assertEqual(
+            resolve_language(organization_language="en", instance_language="ru"), "en"
+        )
+
+    def test_browser_is_the_last_resort(self) -> None:
+        self.assertEqual(resolve_language(accept_language="en-US"), "en")
+        self.assertEqual(resolve_language(), DEFAULT_LANGUAGE)
+
+
+class FrontendListTests(SimpleTestCase):
+    """Список языков продублирован во фронтенде — он обязан совпадать.
+
+    Виджет открывается у клиента до любого запроса к API и знает свой язык сам,
+    поэтому список там свой. Расхождение означало бы язык, который интерфейс
+    предлагает, а сервер не принимает.
+    """
+
+    def test_frontend_language_list_matches(self) -> None:
+        source = (
+            pathlib.Path(__file__).resolve().parents[4]
+            / "packages/shared/src/i18n/index.ts"
+        )
+        if not source.exists():
+            # В образе бэкенда фронтенда нет: проверка имеет смысл только на
+            # полном чекауте, где и правят оба списка.
+            self.skipTest("фронтенд не смонтирован")
+        codes = re.findall(r'\{ code: "(\w+)", label:', source.read_text(encoding="utf-8"))
+        self.assertEqual(tuple(codes), LANGUAGE_CODES)
+
+
+@override_settings(ROOT_URLCONF="chatballs_backend.urls")
+class MiddlewareTests(TestCase):
+    def test_response_declares_the_language(self) -> None:
+        """Ответ помечен языком и Vary: один URL отдаёт разный текст."""
+
+        response = self.client.get("/api/v1/auth/session/", HTTP_ACCEPT_LANGUAGE="en")
+        self.assertEqual(response["Content-Language"], "en")
+        self.assertIn("Accept-Language", response["Vary"])
diff --git a/apps/backend/chatballs/identity/administration_payloads.py b/apps/backend/chatballs/identity/administration_payloads.py
index 54548e7..0ffee50 100644
--- a/apps/backend/chatballs/identity/administration_payloads.py
+++ b/apps/backend/chatballs/identity/administration_payloads.py
@@ -4,12 +4,13 @@ from zoneinfo import available_timezones
 
 from django.urls import reverse
 
+from chatballs.i18n.languages import LANGUAGES
 from chatballs.identity.audit_catalog import (
-    AUDIT_RESULT_LABELS,
     audit_action_label,
     audit_category,
     audit_category_label,
     audit_object_label,
+    audit_result_label,
 )
 from chatballs.identity.models import AuditEvent, Organization
 
@@ -42,6 +43,9 @@ def organization_settings_payload(organization: Organization) -> dict[str, objec
         "name": organization.name,
         "timezone": organization.timezone,
         "currency": organization.currency,
+        # Пустая строка доезжает до интерфейса как есть: там это отдельный
+        # пункт «Как в установке», а не отсутствие значения.
+        "language": organization.language,
         "updatedAt": organization_updated_at(organization),
         "logoUrl": (
             reverse(
@@ -58,6 +62,17 @@ def administration_timezones() -> list[str]:
     return sorted(available_timezones())
 
 
+def administration_languages() -> list[dict[str, str]]:
+    """Языки для выпадающего списка в «Организации».
+
+    Подпись — на самом языке («Русский», «English»), а не переведённая:
+    человек ищет в списке свой язык, и «Русский» он узнает, даже когда
+    интерфейс сейчас английский.
+    """
+
+    return [{"code": code, "label": label} for code, label in LANGUAGES]
+
+
 def audit_event_payload(event: AuditEvent) -> dict[str, object]:
     """Событие журнала. Отдаём и код действия, и подпись: подписи может не быть
     (тогда интерфейс показывает код), а код нужен для поиска в любом случае."""
@@ -78,7 +93,7 @@ def audit_event_payload(event: AuditEvent) -> dict[str, object]:
         "objectType": event.object_type,
         "objectId": event.object_id,
         "result": event.result,
-        "resultLabel": AUDIT_RESULT_LABELS.get(event.result, "Неизвестно"),
+        "resultLabel": audit_result_label(event.result),
         "sourceIp": event.source_ip or "",
         "correlationId": event.correlation_id,
         "details": event.payload or {},
diff --git a/apps/backend/chatballs/identity/administration_services.py b/apps/backend/chatballs/identity/administration_services.py
index b13e3c7..c99264c 100644
--- a/apps/backend/chatballs/identity/administration_services.py
+++ b/apps/backend/chatballs/identity/administration_services.py
@@ -9,6 +9,8 @@ from django.core.files.base import ContentFile
 from django.core.files.uploadedfile import UploadedFile
 from django.db import transaction
 
+from chatballs.i18n import t
+from chatballs.i18n.languages import normalize_language
 from chatballs.identity.models import Organization
 from chatballs.tenancy.context import TenantContext
 from chatballs.tenancy.storage import adjust_storage_usage
@@ -26,27 +28,36 @@ class OrganizationSettingsInput:
     name: str
     timezone: str
     currency: str
+    # Пустая строка — «как в установке»: организация не обязана выбирать язык,
+    # и владелец, который его не трогал, не должен получить жёсткий русский
+    # после того, как язык установки сменили.
+    language: str = ""
 
 
 def _validate_input(data: OrganizationSettingsInput) -> OrganizationSettingsInput:
     name = data.name.strip()
     timezone = data.timezone.strip()
     currency = data.currency.strip().upper()
+    language = normalize_language(data.language)
+    if data.language.strip() and not language:
+        raise ValidationError({"language": t("settings.language_unsupported")})
     if not name:
-        raise ValidationError({"name": "Укажите название организации"})
+        raise ValidationError({"name": t("admin.organization_name_required")})
     if len(name) > 255:
-        raise ValidationError({"name": "Название не должно превышать 255 символов"})
+        raise ValidationError({"name": t("admin.name_too_long")})
     try:
         ZoneInfo(timezone)
     except (ValueError, ZoneInfoNotFoundError) as error:
         raise ValidationError(
-            {"timezone": "Укажите корректный часовой пояс"}
+            {"timezone": t("admin.invalid_timezone")}
         ) from error
     if currency != "RUB":
         raise ValidationError(
-            {"currency": "Поддерживается только российский рубль (RUB)"}
+            {"currency": t("admin.currency_rub_only")}
         )
-    return OrganizationSettingsInput(name=name, timezone=timezone, currency=currency)
+    return OrganizationSettingsInput(
+        name=name, timezone=timezone, currency=currency, language=language
+    )
 
 
 @transaction.atomic
@@ -62,7 +73,8 @@ def update_organization_settings(
     organization.name = clean.name
     organization.timezone = clean.timezone
     organization.currency = clean.currency
-    organization.save(update_fields=["name", "timezone", "currency"])
+    organization.language = clean.language
+    organization.save(update_fields=["name", "timezone", "currency", "language"])
     return organization
 
 
@@ -84,7 +96,7 @@ def replace_organization_logo(
 ) -> Organization:
     data = upload.read()
     if not data:
-        raise ValidationError({"file": "Выберите файл логотипа"})
+        raise ValidationError({"file": t("admin.choose_logo_file")})
     if len(data) > MAX_LOGO_BYTES:
         raise ValidationError({"file": "Размер логотипа не должен превышать 2 МБ"})
     detected = _image_type(data)
diff --git a/apps/backend/chatballs/identity/administration_views.py b/apps/backend/chatballs/identity/administration_views.py
index d9dec80..d3dfc8b 100644
--- a/apps/backend/chatballs/identity/administration_views.py
+++ b/apps/backend/chatballs/identity/administration_views.py
@@ -13,7 +13,9 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from chatballs.api.permissions import HasCapability
+from chatballs.i18n import t
 from chatballs.identity.administration_payloads import (
+    administration_languages,
     administration_timezones,
     audit_event_payload,
     organization_settings_payload,
@@ -29,6 +31,7 @@ from chatballs.identity.audit_catalog import (
     AUDIT_CATEGORY_ALIASES,
     AUDIT_RESULT_LABELS,
     audit_categories,
+    audit_result_label,
 )
 from chatballs.identity.models import AuditEvent
 
@@ -58,6 +61,7 @@ class OrganizationSettingsView(APIView):
                     request.tenant_context.organization
                 ),
                 "timezones": administration_timezones(),
+                "languages": administration_languages(),
             }
         )
 
@@ -71,6 +75,7 @@ class OrganizationSettingsView(APIView):
                     name=str(body.get("name", organization.name)),
                     timezone=str(body.get("timezone", organization.timezone)),
                     currency=str(body.get("currency", organization.currency)),
+                    language=str(body.get("language", organization.language)),
                 ),
             )
         except ValidationError as error:
@@ -101,7 +106,7 @@ class OrganizationLogoView(APIView):
     def get(self, request: Request):
         organization = request.tenant_context.organization
         if not organization.logo:
-            return Response({"detail": "Логотип не загружен"}, status=404)
+            return Response({"detail": t("admin.logo_not_uploaded")}, status=404)
         return FileResponse(
             organization.logo.open("rb"),
             content_type=organization.logo_content_type or "application/octet-stream",
@@ -111,7 +116,7 @@ class OrganizationLogoView(APIView):
     def post(self, request: Request) -> Response:
         upload = request.FILES.get("file")
         if upload is None:
-            return Response({"detail": "Выберите файл логотипа"}, status=400)
+            return Response({"detail": t("admin.choose_logo_file")}, status=400)
         try:
             organization = replace_organization_logo(
                 context=request.tenant_context,
@@ -244,8 +249,8 @@ class AuditListView(APIView):
                 "filters": {
                     "categories": audit_categories(),
                     "results": [
-                        {"value": key, "label": label}
-                        for key, label in AUDIT_RESULT_LABELS.items()
+                        {"value": key, "label": audit_result_label(key)}
+                        for key in AUDIT_RESULT_LABELS
                     ],
                     "actors": _audit_actors(base),
                 },
diff --git a/apps/backend/chatballs/identity/audit_catalog.py b/apps/backend/chatballs/identity/audit_catalog.py
index 4101ffb..f65d858 100644
--- a/apps/backend/chatballs/identity/audit_catalog.py
+++ b/apps/backend/chatballs/identity/audit_catalog.py
@@ -14,22 +14,24 @@
 
 from __future__ import annotations
 
+from chatballs.i18n import t
+
 # Разделы журнала: по ним фильтр и группировка. Ключ — префикс кода действия
 # до первой точки.
 AUDIT_CATEGORY_LABELS: dict[str, str] = {
-    "identity": "Доступ и сотрудники",
-    "access_assignment": "Доступ и сотрудники",
-    "administration": "Настройки",
-    "organization": "Организация",
-    "integrations": "Интеграции",
-    "channels": "Каналы",
-    "ai": "AI и знания",
-    "conversations": "Диалоги",
-    "conversation": "Диалоги",
-    "contacts": "Контакты",
-    "calls": "Звонки",
-    "support_portal": "Порталы",
-    "demo": "Демо-данные",
+    "identity": "audit.category_identity",
+    "access_assignment": "audit.category_access_assignment",
+    "administration": "audit.category_administration",
+    "organization": "audit.category_organization",
+    "integrations": "audit.category_integrations",
+    "channels": "audit.category_channels",
+    "ai": "audit.category_ai",
+    "conversations": "audit.category_conversations",
+    "conversation": "audit.category_conversation",
+    "contacts": "audit.category_contacts",
+    "calls": "audit.category_calls",
+    "support_portal": "audit.category_support_portal",
+    "demo": "audit.category_demo",
 }
 
 AUDIT_CATEGORY_ORDER = (
@@ -56,141 +58,149 @@ AUDIT_CATEGORY_ALIASES = {
 
 AUDIT_ACTION_LABELS: dict[str, str] = {
     # --- Доступ и сотрудники ---
-    "identity.login_succeeded": "Вход в систему",
-    "identity.login_failed": "Неудачный вход",
-    "identity.login_totp_required": "Запрошен код двухфакторной проверки",
-    "identity.logout": "Выход из системы",
-    "identity.password_reset_requested": "Запрошен сброс пароля",
-    "identity.password_reset_completed": "Пароль восстановлен",
-    "identity.password_reset_failed": "Неудачный сброс пароля",
-    "identity.temporary_password_changed": "Сменён временный пароль",
-    "identity.profile_updated": "Изменён профиль сотрудника",
-    "identity.profile_password_changed": "Изменён пароль",
-    "identity.profile_sessions_revoked": "Завершены свои сессии",
-    "identity.profile_totp_setup_started": "Начата настройка двухфакторной проверки",
-    "identity.profile_totp_disabled": "Отключена двухфакторная проверка",
-    "identity.totp_enabled": "Включена двухфакторная проверка",
-    "identity.totp_setup_failed": "Ошибка настройки двухфакторной проверки",
-    "identity.totp_verify_failed": "Неверный код двухфакторной проверки",
-    "identity.avatar_updated": "Изменено фото профиля",
-    "identity.avatar_deleted": "Удалено фото профиля",
-    "identity.employee_created": "Добавлен сотрудник",
-    "identity.employee_updated": "Изменён сотрудник",
-    "identity.employee_blocked": "Сотрудник заблокирован",
-    "identity.employee_unblocked": "Сотрудник разблокирован",
-    "identity.employee_role_changed": "Изменена роль сотрудника",
-    "identity.employee_groups_changed": "Изменены группы сотрудника",
-    "identity.employee_password_reset": "Сброшен пароль сотрудника",
-    "identity.employee_sessions_terminated": "Завершены сессии сотрудника",
-    "identity.employee_privileged_action_denied": "Отказано в привилегированном действии",
-    "identity.group_created": "Создана группа",
-    "identity.group_updated": "Изменена группа",
-    "identity.group_deleted": "Удалена группа",
-    "identity.ownership_transferred": "Передано владение организацией",
-    "identity.owner_bootstrapped": "Создан владелец установки",
-    "identity.instance_setup_completed": "Пройден мастер первого запуска",
-    "identity.access_profile_created": "Создан профиль доступа",
-    "identity.access_profile_updated": "Изменён профиль доступа",
-    "identity.access_assignment_created": "Назначен доступ сотруднику",
-    "identity.access_assignment_revoked": "Отозван доступ сотрудника",
-    "access_assignment.created": "Назначен доступ сотруднику",
+    "identity.login_succeeded": "audit.action_identity_login_succeeded",
+    "identity.login_failed": "audit.action_identity_login_failed",
+    "identity.login_totp_required": "audit.action_identity_login_totp_required",
+    "identity.logout": "audit.action_identity_logout",
+    "identity.password_reset_requested": "audit.action_identity_password_reset_requested",
+    "identity.password_reset_completed": "audit.action_identity_password_reset_completed",
+    "identity.password_reset_failed": "audit.action_identity_password_reset_failed",
+    "identity.temporary_password_changed": "audit.action_identity_temporary_password_changed",
+    "identity.profile_updated": "audit.action_identity_profile_updated",
+    "identity.profile_language_changed": "audit.action_identity_profile_language_changed",
+    "identity.profile_password_changed": "audit.action_identity_profile_password_changed",
+    "identity.profile_sessions_revoked": "audit.action_identity_profile_sessions_revoked",
+    "identity.profile_totp_setup_started": "audit.action_identity_profile_totp_setup_started",
+    "identity.profile_totp_disabled": "audit.action_identity_profile_totp_disabled",
+    "identity.totp_enabled": "audit.action_identity_totp_enabled",
+    "identity.totp_setup_failed": "audit.action_identity_totp_setup_failed",
+    "identity.totp_verify_failed": "audit.action_identity_totp_verify_failed",
+    "identity.avatar_updated": "audit.action_identity_avatar_updated",
+    "identity.avatar_deleted": "audit.action_identity_avatar_deleted",
+    "identity.employee_created": "audit.action_identity_employee_created",
+    "identity.employee_updated": "audit.action_identity_employee_updated",
+    "identity.employee_blocked": "audit.action_identity_employee_blocked",
+    "identity.employee_unblocked": "audit.action_identity_employee_unblocked",
+    "identity.employee_role_changed": "audit.action_identity_employee_role_changed",
+    "identity.employee_groups_changed": "audit.action_identity_employee_groups_changed",
+    "identity.employee_password_reset": "audit.action_identity_employee_password_reset",
+    "identity.employee_sessions_terminated": "audit.action_identity_employee_sessions_terminated",
+    "identity.employee_privileged_action_denied": "audit.action_identity_employee_privileged_action_denied",
+    "identity.group_created": "audit.action_identity_group_created",
+    "identity.group_updated": "audit.action_identity_group_updated",
+    "identity.group_deleted": "audit.action_identity_group_deleted",
+    "identity.ownership_transferred": "audit.action_identity_ownership_transferred",
+    "identity.owner_bootstrapped": "audit.action_identity_owner_bootstrapped",
+    "identity.instance_setup_completed": "audit.action_identity_instance_setup_completed",
+    "identity.access_profile_created": "audit.action_identity_access_profile_created",
+    "identity.access_profile_updated": "audit.action_identity_access_profile_updated",
+    "identity.access_assignment_created": "audit.action_identity_access_assignment_created",
+    "identity.access_assignment_revoked": "audit.action_identity_access_assignment_revoked",
+    "access_assignment.created": "audit.action_access_assignment_created",
     # --- Настройки ---
-    "administration.organization_updated": "Изменены данные организации",
-    "administration.logo_updated": "Изменён логотип организации",
-    "administration.logo_deleted": "Удалён логотип организации",
-    "administration.communication_updated": "Изменены голосовые и звонки",
-    "administration.storage_updated": "Изменено хранилище файлов",
-    "administration.storage_migration_requested": "Запущен перенос файлов",
-    "administration.instance_updated": "Изменены настройки платформы",
+    "administration.organization_updated": "audit.action_administration_organization_updated",
+    "administration.logo_updated": "audit.action_administration_logo_updated",
+    "administration.logo_deleted": "audit.action_administration_logo_deleted",
+    "administration.communication_updated": "audit.action_administration_communication_updated",
+    "administration.storage_updated": "audit.action_administration_storage_updated",
+    "administration.storage_migration_requested": "audit.action_administration_storage_migration_requested",
+    "administration.instance_updated": "audit.action_administration_instance_updated",
     # --- Организация ---
-    "organization.provisioned": "Создана организация",
-    "organization.owner_activated": "Активирован владелец организации",
-    "organization.owner_invitation_requested": "Отправлено приглашение владельцу",
+    "organization.provisioned": "audit.action_organization_provisioned",
+    "organization.owner_activated": "audit.action_organization_owner_activated",
+    "organization.owner_invitation_requested": "audit.action_organization_owner_invitation_requested",
     # --- Интеграции и каналы ---
-    "integrations.integration_created": "Добавлена интеграция",
-    "integrations.integration_updated": "Изменена интеграция",
-    "integrations.integration_deleted": "Удалена интеграция",
-    "channels.channel_created": "Создан канал",
-    "channels.channel_updated": "Изменён канал",
-    "channels.channel_deleted": "Удалён канал",
-    "channels.connection_bound": "Подключение привязано к агенту",
+    "integrations.integration_created": "audit.action_integrations_integration_created",
+    "integrations.integration_updated": "audit.action_integrations_integration_updated",
+    "integrations.integration_deleted": "audit.action_integrations_integration_deleted",
+    "channels.channel_created": "audit.action_channels_channel_created",
+    "channels.channel_updated": "audit.action_channels_channel_updated",
+    "channels.channel_deleted": "audit.action_channels_channel_deleted",
+    "channels.connection_bound": "audit.action_channels_connection_bound",
     # --- AI и знания ---
-    "ai.agent_created": "Создан агент",
-    "ai.agent_status_changed": "Изменён статус агента",
-    "ai.agent_category_knowledge_selected": "Выбраны знания категории для агента",
-    "ai.agent_knowledge_attached": "Знания подключены к агенту",
-    "ai.agent_knowledge_detached": "Знания отключены от агента",
-    "ai.agent_portal_articles_attached": "Статьи портала подключены к агенту",
-    "ai.agent_portal_articles_detached": "Статьи портала отключены от агента",
-    "ai.knowledge_created": "Добавлено знание",
-    "ai.knowledge_updated": "Изменено знание",
-    "ai.knowledge_deleted": "Удалено знание",
-    "ai.knowledge_reindexed": "Знание переиндексировано",
-    "ai.knowledge_imported": "Знания импортированы",
-    "ai.knowledge_attachment_added": "Добавлено вложение знания",
-    "ai.knowledge_attachment_deleted": "Удалено вложение знания",
-    "ai.knowledge_category_created": "Создана категория знаний",
-    "ai.knowledge_category_updated": "Изменена категория знаний",
-    "ai.knowledge_category_deleted": "Удалена категория знаний",
+    "ai.agent_created": "audit.action_ai_agent_created",
+    "ai.agent_status_changed": "audit.action_ai_agent_status_changed",
+    "ai.agent_category_knowledge_selected": "audit.action_ai_agent_category_knowledge_selected",
+    "ai.agent_knowledge_attached": "audit.action_ai_agent_knowledge_attached",
+    "ai.agent_knowledge_detached": "audit.action_ai_agent_knowledge_detached",
+    "ai.agent_portal_articles_attached": "audit.action_ai_agent_portal_articles_attached",
+    "ai.agent_portal_articles_detached": "audit.action_ai_agent_portal_articles_detached",
+    "ai.knowledge_created": "audit.action_ai_knowledge_created",
+    "ai.knowledge_updated": "audit.action_ai_knowledge_updated",
+    "ai.knowledge_deleted": "audit.action_ai_knowledge_deleted",
+    "ai.knowledge_reindexed": "audit.action_ai_knowledge_reindexed",
+    "ai.knowledge_imported": "audit.action_ai_knowledge_imported",
+    "ai.knowledge_attachment_added": "audit.action_ai_knowledge_attachment_added",
+    "ai.knowledge_attachment_deleted": "audit.action_ai_knowledge_attachment_deleted",
+    "ai.knowledge_category_created": "audit.action_ai_knowledge_category_created",
+    "ai.knowledge_category_updated": "audit.action_ai_knowledge_category_updated",
+    "ai.knowledge_category_deleted": "audit.action_ai_knowledge_category_deleted",
     # --- Диалоги ---
-    "conversations.claimed": "Диалог взят в работу",
-    "conversations.released_to_ai": "Диалог возвращён AI",
-    "conversations.returned_to_queue": "Диалог возвращён в очередь",
-    "conversations.assignee_changed": "Изменён ответственный за диалог",
-    "conversations.group_changed": "Изменена группа диалога",
-    "conversations.priority_changed": "Изменён приоритет диалога",
-    "conversations.closed": "Диалог закрыт",
-    "conversations.archived": "Диалог отправлен в архив",
-    "conversations.unarchived": "Диалог возвращён из архива",
-    "conversations.marked_spam": "Диалог помечен спамом",
-    "conversations.contact_requested": "Запрошены контакты клиента",
-    "conversations.contact_updated": "Изменён контакт диалога",
-    "conversation.contact_updated": "Изменён контакт диалога",
-    "conversations.file_sent": "Отправлен файл в диалог",
-    "conversations.voice_sent": "Отправлено голосовое в диалог",
+    "conversations.claimed": "audit.action_conversations_claimed",
+    "conversations.released_to_ai": "audit.action_conversations_released_to_ai",
+    "conversations.returned_to_queue": "audit.action_conversations_returned_to_queue",
+    "conversations.assignee_changed": "audit.action_conversations_assignee_changed",
+    "conversations.group_changed": "audit.action_conversations_group_changed",
+    "conversations.priority_changed": "audit.action_conversations_priority_changed",
+    "conversations.closed": "audit.action_conversations_closed",
+    "conversations.archived": "audit.action_conversations_archived",
+    "conversations.unarchived": "audit.action_conversations_unarchived",
+    "conversations.marked_spam": "audit.action_conversations_marked_spam",
+    "conversations.contact_requested": "audit.action_conversations_contact_requested",
+    "conversations.contact_updated": "audit.action_conversations_contact_updated",
+    "conversation.contact_updated": "audit.action_conversation_contact_updated",
+    "conversations.file_sent": "audit.action_conversations_file_sent",
+    "conversations.voice_sent": "audit.action_conversations_voice_sent",
     # --- Контакты ---
-    "contacts.merged": "Объединение контактов",
-    "contacts.unmerged": "Разъединение контактов",
+    "contacts.merged": "audit.action_contacts_merged",
+    "contacts.unmerged": "audit.action_contacts_unmerged",
     # --- Звонки ---
-    "calls.requested": "Запрошен звонок",
-    "calls.cancelled": "Звонок отменён",
+    "calls.requested": "audit.action_calls_requested",
+    "calls.cancelled": "audit.action_calls_cancelled",
     # --- Порталы ---
-    "support_portal.created": "Создан портал",
-    "support_portal.published": "Портал опубликован",
-    "support_portal.draft": "Портал снят с публикации",
-    "support_portal.articles_imported": "Импортированы статьи портала",
+    "support_portal.created": "audit.action_support_portal_created",
+    "support_portal.published": "audit.action_support_portal_published",
+    "support_portal.draft": "audit.action_support_portal_draft",
+    "support_portal.articles_imported": "audit.action_support_portal_articles_imported",
     # --- Демо-данные ---
-    "demo.install_requested": "Запрошена установка демо-данных",
-    "demo.installed": "Демо-данные установлены",
-    "demo.installed_accounts": "Созданы учётные записи демо-сотрудников",
-    "demo.remove_requested": "Запрошено удаление демо-данных",
-    "demo.removed": "Демо-данные удалены",
+    "demo.install_requested": "audit.action_demo_install_requested",
+    "demo.installed": "audit.action_demo_installed",
+    "demo.installed_accounts": "audit.action_demo_installed_accounts",
+    "demo.remove_requested": "audit.action_demo_remove_requested",
+    "demo.removed": "audit.action_demo_removed",
 }
 
+def audit_result_label(result: str) -> str:
+    """Подпись результата события или «Неизвестно» для чужого кода."""
+
+    key = AUDIT_RESULT_LABELS.get(result)
+    return t(key) if key else t("audit.result_unknown")
+
+
 AUDIT_RESULT_LABELS = {
-    "SUCCESS": "Выполнено",
-    "DENIED": "Отклонено",
-    "FAILED": "Ошибка",
+    "SUCCESS": "audit.result_success",
+    "DENIED": "audit.result_denied",
+    "FAILED": "audit.result_failed",
 }
 
 # Что за объект тронули: тип из модели в человеческом виде. Пусто — покажем
 # сам object_type, он и так читается латиницей.
 AUDIT_OBJECT_TYPE_LABELS = {
-    "Organization": "Организация",
-    "HumanUser": "Сотрудник",
-    "EmployeeGroup": "Группа",
-    "Integration": "Интеграция",
-    "Channel": "Канал",
-    "Knowledge": "Знание",
-    "KnowledgeCategory": "Категория знаний",
-    "AgentCard": "Агент",
-    "Conversation": "Диалог",
-    "Contact": "Контакт",
-    "SupportPortal": "Портал",
-    "AccessProfile": "Профиль доступа",
-    "AccessAssignment": "Назначение доступа",
-    "InstanceSettings": "Установка",
-    "StorageSettings": "Хранилище",
+    "Organization": "audit.object_organization",
+    "HumanUser": "audit.object_humanuser",
+    "EmployeeGroup": "audit.object_employeegroup",
+    "Integration": "audit.object_integration",
+    "Channel": "audit.object_channel",
+    "Knowledge": "audit.object_knowledge",
+    "KnowledgeCategory": "audit.object_knowledgecategory",
+    "AgentCard": "audit.object_agentcard",
+    "Conversation": "audit.object_conversation",
+    "Contact": "audit.object_contact",
+    "SupportPortal": "audit.object_supportportal",
+    "AccessProfile": "audit.object_accessprofile",
+    "AccessAssignment": "audit.object_accessassignment",
+    "InstanceSettings": "audit.object_instancesettings",
+    "StorageSettings": "audit.object_storagesettings",
 }
 
 
@@ -202,7 +212,8 @@ def audit_category(action: str) -> str:
 
 
 def audit_category_label(category: str) -> str:
-    return AUDIT_CATEGORY_LABELS.get(category, "Прочее")
+    key = AUDIT_CATEGORY_LABELS.get(category)
+    return t(key) if key else t("audit.category_other")
 
 
 def audit_action_label(action: str) -> str:
@@ -213,7 +224,8 @@ def audit_action_label(action: str) -> str:
     надо дописать сюда.
     """
 
-    return AUDIT_ACTION_LABELS.get(action, "")
+    key = AUDIT_ACTION_LABELS.get(action)
+    return t(key) if key else ""
 
 
 def audit_object_label(object_type: str, object_id: str) -> str:
@@ -221,7 +233,8 @@ def audit_object_label(object_type: str, object_id: str) -> str:
 
     if not object_type:
         return ""
-    label = AUDIT_OBJECT_TYPE_LABELS.get(object_type, object_type)
+    key = AUDIT_OBJECT_TYPE_LABELS.get(object_type)
+    label = t(key) if key else object_type
     return f"{label} · {object_id}" if object_id else label
 
 
@@ -229,6 +242,6 @@ def audit_categories() -> list[dict[str, str]]:
     """Разделы для фильтра — в фиксированном порядке, а не в порядке словаря."""
 
     return [
-        {"value": key, "label": AUDIT_CATEGORY_LABELS[key]}
+        {"value": key, "label": t(AUDIT_CATEGORY_LABELS[key])}
         for key in AUDIT_CATEGORY_ORDER
     ]
diff --git a/apps/backend/chatballs/identity/auth/__init__.py b/apps/backend/chatballs/identity/auth/__init__.py
index f8d344d..bd72885 100644
--- a/apps/backend/chatballs/identity/auth/__init__.py
+++ b/apps/backend/chatballs/identity/auth/__init__.py
@@ -8,6 +8,7 @@ from chatballs.identity.auth.profile import (
     ChangeTemporaryPasswordView,
     ProfileAppearanceView,
     ProfileAvatarView,
+    ProfileLanguageView,
     ProfilePasswordView,
     ProfileRevokeOtherSessionsView,
     ProfileSessionsView,
@@ -28,6 +29,7 @@ __all__ = [
     "ProfileUpdateView",
     "ProfileAppearanceView",
     "ProfileAvatarView",
+    "ProfileLanguageView",
     "ProfilePasswordView",
     "ProfileTotpStartView",
     "ProfileTotpDisableView",
diff --git a/apps/backend/chatballs/identity/auth/common.py b/apps/backend/chatballs/identity/auth/common.py
index 91906a4..5de8e2e 100644
--- a/apps/backend/chatballs/identity/auth/common.py
+++ b/apps/backend/chatballs/identity/auth/common.py
@@ -1,6 +1,7 @@
 from django.conf import settings
 from rest_framework.request import Request
 
+from chatballs.i18n import current_language
 from chatballs.identity.avatars import own_avatar_url
 from chatballs.identity.models import HumanUser, Organization, OrganizationMembership
 from chatballs.identity.policy import get_effective_access
@@ -62,6 +63,12 @@ def _user_payload(user: HumanUser) -> dict[str, object]:
         "deliveryMode": settings.CHATBALLS_DELIVERY_MODE,
         "uiTheme": user.ui_theme,
         "uiAccent": user.ui_accent,
+        # Личный выбор языка: пустая строка — «как в организации». Отдельно
+        # отдаётся язык, на котором интерфейс открывается прямо сейчас, — он
+        # уже разрешён по цепочке профиль → организация → установка, и
+        # фронтенду не нужно повторять это правило у себя.
+        "uiLanguage": user.ui_language,
+        "language": current_language(),
         "avatarUrl": own_avatar_url(user),
         "memberships": memberships,
     }
diff --git a/apps/backend/chatballs/identity/auth/password_reset.py b/apps/backend/chatballs/identity/auth/password_reset.py
index 460c533..3904c66 100644
--- a/apps/backend/chatballs/identity/auth/password_reset.py
+++ b/apps/backend/chatballs/identity/auth/password_reset.py
@@ -13,6 +13,7 @@ from rest_framework.throttling import ScopedRateThrottle
 from rest_framework.views import APIView
 
 from chatballs.events.services import DomainEvent, enqueue_event
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.event_handlers import PASSWORD_RESET_REQUESTED
 from chatballs.identity.models import AuditResult, HumanUser
@@ -87,7 +88,7 @@ class PasswordResetConfirmView(APIView):
         user = _user_from_reset_link(str(body.get("uid", "")), str(body.get("token", "")))
         if user is None:
             record_audit_event(action="identity.password_reset_failed", result=AuditResult.DENIED, request=request)
-            return Response({"detail": "Ссылка недействительна или истекла"}, status=400)
+            return Response({"detail": t("identity.link_invalid_or_expired")}, status=400)
 
         new_password = str(body.get("newPassword", ""))
         try:
diff --git a/apps/backend/chatballs/identity/auth/profile.py b/apps/backend/chatballs/identity/auth/profile.py
index e982963..6361b9c 100644
--- a/apps/backend/chatballs/identity/auth/profile.py
+++ b/apps/backend/chatballs/identity/auth/profile.py
@@ -2,17 +2,20 @@ from django.contrib.auth import login
 from django.contrib.auth.password_validation import validate_password
 from django.core.exceptions import ValidationError as DjangoValidationError
 from django.http import FileResponse
-from django.utils import timezone
+from django.utils import timezone, translation
 from rest_framework.parsers import FormParser, MultiPartParser
 from rest_framework.permissions import IsAuthenticated
 from rest_framework.request import Request
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
+from chatballs.i18n import t
+from chatballs.i18n.languages import normalize_language, resolve_language
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.auth.common import _revoke_other_user_sessions, _user_payload
 from chatballs.identity.avatars import delete_user_avatar, replace_user_avatar
-from chatballs.identity.models import HumanUser
+from chatballs.identity.instance_settings import default_language
+from chatballs.identity.models import HumanUser, OrganizationMembership
 from chatballs.identity.sessions import list_user_sessions
 from chatballs.tenancy.ingress import user_requires_totp
 
@@ -53,7 +56,7 @@ class ProfileAvatarView(APIView):
     def get(self, request: Request) -> Response | FileResponse:
         user = request.user
         if not user.avatar:
-            return Response({"detail": "Фото не задано"}, status=404)
+            return Response({"detail": t("profile.photo_not_set")}, status=404)
         return FileResponse(
             user.avatar.open("rb"),
             content_type=user.avatar_content_type or "application/octet-stream",
@@ -63,7 +66,7 @@ class ProfileAvatarView(APIView):
     def post(self, request: Request) -> Response:
         upload = request.FILES.get("file")
         if upload is None:
-            return Response({"detail": "Выберите файл фото"}, status=400)
+            return Response({"detail": t("profile.choose_photo_file")}, status=400)
         replace_user_avatar(request.user, upload)
         record_audit_event(
             action="identity.avatar_updated",
@@ -128,7 +131,7 @@ class ProfileTotpStartView(APIView):
     def post(self, request: Request) -> Response:
         if request.user.totp_enabled:
             return Response(
-                {"detail": "TOTP уже включена: сначала отключите её текущим паролем"},
+                {"detail": t("profile.totp_already_on")},
                 status=409,
             )
         request.user.totp_secret = ""
@@ -230,10 +233,66 @@ class ProfileAppearanceView(APIView):
         theme = str(body.get("theme", request.user.ui_theme)).strip().upper()
         accent = str(body.get("accent", request.user.ui_accent)).strip().lower()
         if theme not in UiTheme.values:
-            return Response({"detail": "Неизвестная тема"}, status=400)
+            return Response({"detail": t("profile.unknown_theme")}, status=400)
         if accent and not re.fullmatch(r"#[0-9a-f]{6}", accent):
-            return Response({"detail": "Акцент — HEX-цвет вида #1677ff"}, status=400)
+            return Response({"detail": t("profile.accent_hex")}, status=400)
         request.user.ui_theme = theme
         request.user.ui_accent = accent
         request.user.save(update_fields=["ui_theme", "ui_accent"])
         return Response({"authenticated": True, "user": _user_payload(request.user)})
+
+
+class ProfileLanguageView(APIView):
+    """Язык интерфейса — личная настройка сотрудника.
+
+    Пустое значение возвращает человека к языку организации: это не «русский»,
+    а снятие личного выбора, и после смены языка организации такой сотрудник
+    поедет за ней, а тот, кто выбрал язык явно, — нет.
+    """
+
+    permission_classes = [IsAuthenticated]
+
+    def post(self, request: Request) -> Response:
+        raw = str(request.data.get("language", "")).strip()
+        language = normalize_language(raw)
+        if raw and not language:
+            return Response({"detail": t("settings.language_unsupported")}, status=400)
+        request.user.ui_language = language
+        request.user.save(update_fields=["ui_language"])
+        record_audit_event(
+            action="identity.profile_language_changed",
+            actor=request.user,
+            object_type="HumanUser",
+            object_id=str(request.user.id),
+            request=request,
+        )
+        # Ответ уже на новом языке: интерфейс перерисуется по нему сразу, не
+        # дожидаясь следующего запроса.
+        resolved = resolve_language(
+            user_language=language,
+            organization_language=_request_organization_language(request),
+            instance_language=default_language(),
+            accept_language=request.headers.get("Accept-Language"),
+        )
+        with translation.override(resolved):
+            return Response({"authenticated": True, "user": _user_payload(request.user)})
+
+
+def _request_organization_language(request: Request) -> str:
+    """Язык организации запроса, если он у этого запроса вообще есть.
+
+    Профиль открывается вне организации, поэтому tenant_context здесь обычно
+    пуст: тогда язык берётся из единственного членства, а при нескольких —
+    из того, что старше, чтобы ответ не зависел от порядка выборки.
+    """
+
+    context = getattr(request, "tenant_context", None)
+    if context is not None:
+        return context.organization.language or ""
+    membership = (
+        OrganizationMembership.objects.select_related("organization")
+        .filter(user=request.user, blocked_at__isnull=True)
+        .order_by("created_at", "id")
+        .first()
+    )
+    return membership.organization.language if membership is not None else ""
diff --git a/apps/backend/chatballs/identity/auth/sessions.py b/apps/backend/chatballs/identity/auth/sessions.py
index 5f28eab..b91fc40 100644
--- a/apps/backend/chatballs/identity/auth/sessions.py
+++ b/apps/backend/chatballs/identity/auth/sessions.py
@@ -9,6 +9,7 @@ from rest_framework.response import Response
 from rest_framework.throttling import ScopedRateThrottle
 from rest_framework.views import APIView
 
+from chatballs.i18n import current_language
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.auth.common import _challenge_payload, _user_payload
 from chatballs.identity.auth.totp_utils import TOTP_SESSION_KEY, TOTP_STARTED_KEY
@@ -22,7 +23,12 @@ class SessionView(APIView):
 
     def get(self, request: Request) -> Response:
         if not request.user.is_authenticated:
-            return Response({"authenticated": False})
+            # Язык установки нужен и до входа: логин и сброс пароля — экраны
+            # самой коробки, и на английской машине они должны открываться на
+            # языке установки, а не на языке браузера. Без этого фронтенд знал
+            # бы только про браузер и расходился бы с бэкендом, который язык
+            # установки учитывает.
+            return Response({"authenticated": False, "language": current_language()})
         return Response({"authenticated": True, "user": _user_payload(request.user)})
 
 
diff --git a/apps/backend/chatballs/identity/auth_urls.py b/apps/backend/chatballs/identity/auth_urls.py
index 1d6fc9b..c75fe46 100644
--- a/apps/backend/chatballs/identity/auth_urls.py
+++ b/apps/backend/chatballs/identity/auth_urls.py
@@ -11,6 +11,7 @@ urlpatterns = [
     path("password-reset/confirm/", auth.PasswordResetConfirmView.as_view(), name="auth-password-reset-confirm"),
     path("profile/update/", auth.ProfileUpdateView.as_view(), name="auth-profile-update"),
     path("profile/appearance/", auth.ProfileAppearanceView.as_view(), name="auth-profile-appearance"),
+    path("profile/language/", auth.ProfileLanguageView.as_view(), name="auth-profile-language"),
     path("profile/avatar/", auth.ProfileAvatarView.as_view(), name="auth-profile-avatar"),
     path("profile/password/", auth.ProfilePasswordView.as_view(), name="auth-profile-password"),
     path("profile/totp/start/", auth.ProfileTotpStartView.as_view(), name="auth-profile-totp-start"),
diff --git a/apps/backend/chatballs/identity/avatars.py b/apps/backend/chatballs/identity/avatars.py
index 96a4580..883506f 100644
--- a/apps/backend/chatballs/identity/avatars.py
+++ b/apps/backend/chatballs/identity/avatars.py
@@ -16,6 +16,7 @@ from django.core.files.base import ContentFile
 from django.core.files.uploadedfile import UploadedFile
 from rest_framework.exceptions import ValidationError
 
+from chatballs.i18n import t
 from chatballs.identity.models import HumanUser
 
 MAX_AVATAR_BYTES = 2 * 1024 * 1024
@@ -65,7 +66,7 @@ def image_type(data: bytes) -> tuple[str, str] | None:
 def replace_user_avatar(user: HumanUser, upload: UploadedFile) -> HumanUser:
     data = upload.read()
     if not data:
-        raise ValidationError({"file": "Выберите файл фото"})
+        raise ValidationError({"file": t("profile.choose_photo_file")})
     if len(data) > MAX_AVATAR_BYTES:
         raise ValidationError({"file": "Размер фото не должен превышать 2 МБ"})
     detected = image_type(data)
diff --git a/apps/backend/chatballs/identity/emails.py b/apps/backend/chatballs/identity/emails.py
index 62c3062..1a63c29 100644
--- a/apps/backend/chatballs/identity/emails.py
+++ b/apps/backend/chatballs/identity/emails.py
@@ -1,9 +1,13 @@
 from django.contrib.auth.tokens import default_token_generator
 from django.core.mail import send_mail
+from django.utils import translation
 from django.utils.encoding import force_bytes
 from django.utils.http import urlsafe_base64_encode
 
+from chatballs.i18n import t
+from chatballs.i18n.languages import resolve_language
 from chatballs.identity.instance_settings import (
+    default_language,
     email_connection,
     email_from_address,
     public_base_url,
@@ -19,34 +23,54 @@ def _password_setup_url(user: HumanUser) -> str:
     return f"{public_base_url()}/reset-password?uid={uid}&token={token}"
 
 
+def _recipient_language(user: HumanUser) -> str:
+    """Язык получателя письма, а не того, кто нажал кнопку.
+
+    Приглашение сотруднику отправляет владелец, и язык запроса здесь не при
+    чём: письмо читает другой человек. Личный выбор получателя побеждает,
+    дальше — язык его организации, дальше — язык установки.
+    """
+
+    membership = (
+        user.memberships.select_related("organization")
+        .filter(blocked_at__isnull=True)
+        .order_by("created_at", "id")
+        .first()
+    )
+    return resolve_language(
+        user_language=user.ui_language,
+        organization_language=membership.organization.language if membership else "",
+        instance_language=default_language(),
+    )
+
+
 def send_initial_access_email(user: HumanUser) -> None:
     setup_url = _password_setup_url(user)
-    send_mail(
-        subject="Первичный доступ к Chatballs",
-        message=(
-            f"Здравствуйте, {user.full_name or user.email}.\n\n"
-            "Для вас создана учётная запись Chatballs. Чтобы задать пароль первичного доступа, "
-            "перейдите по ссылке:\n"
-            f"{setup_url}\n\n"
-            "Ссылка действует 30 минут. Если вы не ожидали это письмо, обратитесь к владельцу организации."
-        ),
-        from_email=email_from_address(),
-        recipient_list=[user.email],
-        connection=email_connection(),
-    )
+    with translation.override(_recipient_language(user)):
+        send_mail(
+            subject=t("emails.initial_access_subject"),
+            message=t(
+                "emails.initial_access_body",
+                name=user.full_name or user.email,
+                url=setup_url,
+            ),
+            from_email=email_from_address(),
+            recipient_list=[user.email],
+            connection=email_connection(),
+        )
 
 
 def send_password_reset_email(user: HumanUser) -> None:
     reset_url = _password_setup_url(user)
-    send_mail(
-        subject="Восстановление доступа к Chatballs",
-        message=(
-            f"Здравствуйте, {user.full_name or user.email}.\n\n"
-            "Вы запросили сброс пароля для Chatballs. Чтобы задать новый пароль, перейдите по ссылке:\n"
-            f"{reset_url}\n\n"
-            "Ссылка действует 30 минут. Если вы не запрашивали сброс, просто проигнорируйте это письмо."
-        ),
-        from_email=email_from_address(),
-        recipient_list=[user.email],
-        connection=email_connection(),
-    )
+    with translation.override(_recipient_language(user)):
+        send_mail(
+            subject=t("emails.password_reset_subject"),
+            message=t(
+                "emails.password_reset_body",
+                name=user.full_name or user.email,
+                url=reset_url,
+            ),
+            from_email=email_from_address(),
+            recipient_list=[user.email],
+            connection=email_connection(),
+        )
diff --git a/apps/backend/chatballs/identity/employee_security_views.py b/apps/backend/chatballs/identity/employee_security_views.py
index 778673c..3278f3b 100644
--- a/apps/backend/chatballs/identity/employee_security_views.py
+++ b/apps/backend/chatballs/identity/employee_security_views.py
@@ -4,6 +4,7 @@ from rest_framework.request import Request
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.employee_password import clean_password_mode, reset_employee_password
 from chatballs.identity.employee_support import employee_payload, get_owned_profile
@@ -36,12 +37,7 @@ class EmployeeResetPasswordView(APIView):
         # организации, когда человек работает и в другой, нельзя.
         if profile.user.memberships.count() > 1:
             return Response(
-                {
-                    "detail": (
-                        "Сотрудник состоит в нескольких организациях — "
-                        "пароль сбрасывает он сам через восстановление доступа"
-                    )
-                },
+                {"detail": t("admin.multi_org_self_reset")},
                 status=409,
             )
         password = reset_employee_password(
diff --git a/apps/backend/chatballs/identity/employee_views.py b/apps/backend/chatballs/identity/employee_views.py
index cd7f40a..f84c7c1 100644
--- a/apps/backend/chatballs/identity/employee_views.py
+++ b/apps/backend/chatballs/identity/employee_views.py
@@ -7,6 +7,7 @@ from rest_framework.views import APIView
 
 from chatballs.api.pagination import page_payload, paginate
 from chatballs.events.services import DomainEvent, enqueue_event
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.employee_password import clean_password_mode, issue_initial_password
 from chatballs.identity.employee_selectors import employees_for
@@ -50,7 +51,7 @@ class EmployeeAvatarView(APIView):
             .first()
         )
         if membership is None or not membership.user.avatar:
-            return Response({"detail": "Фото не найдено"}, status=404)
+            return Response({"detail": t("admin.photo_not_found")}, status=404)
         response = FileResponse(
             membership.user.avatar.open("rb"),
             content_type=membership.user.avatar_content_type or "application/octet-stream",
diff --git a/apps/backend/chatballs/identity/group_views.py b/apps/backend/chatballs/identity/group_views.py
index e9a35dd..cb87bed 100644
--- a/apps/backend/chatballs/identity/group_views.py
+++ b/apps/backend/chatballs/identity/group_views.py
@@ -8,6 +8,7 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from chatballs.api.permissions import HasCapability
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.group_models import EmployeeGroup, EmployeeGroupMember
 from chatballs.identity.models import OrganizationMembership
@@ -81,11 +82,11 @@ class GroupListView(APIView):
             return Response({"detail": members_error}, status=400)
         color = _clean_color(request.data.get("color"))
         if color is None:
-            return Response({"detail": "Некорректный цвет"}, status=400)
+            return Response({"detail": t("conversations.invalid_colour")}, status=400)
         try:
             group = EmployeeGroup.objects.create(organization=organization, name=name, color=color)
         except (ValidationError, IntegrityError):
-            return Response({"detail": "Группа с таким именем уже есть"}, status=400)
+            return Response({"detail": t("admin.group_name_taken")}, status=400)
         if members:
             EmployeeGroupMember.objects.bulk_create(
                 [
@@ -124,7 +125,7 @@ class GroupDetailView(APIView):
         if "color" in request.data:
             color = _clean_color(request.data.get("color"))
             if color is None:
-                return Response({"detail": "Некорректный цвет"}, status=400)
+                return Response({"detail": t("conversations.invalid_colour")}, status=400)
             group.color = color
         if "name" in request.data or "color" in request.data:
             if "name" in request.data:
@@ -132,7 +133,7 @@ class GroupDetailView(APIView):
             try:
                 group.save()
             except (ValidationError, IntegrityError):
-                return Response({"detail": "Группа с таким именем уже есть"}, status=400)
+                return Response({"detail": t("admin.group_name_taken")}, status=400)
         members, members_error = _resolve_members(
             group.organization, request.data.get("memberIds")
         )
diff --git a/apps/backend/chatballs/identity/instance_settings.py b/apps/backend/chatballs/identity/instance_settings.py
index 67f74ea..b4430b5 100644
--- a/apps/backend/chatballs/identity/instance_settings.py
+++ b/apps/backend/chatballs/identity/instance_settings.py
@@ -43,6 +43,11 @@ class InstanceSettings(models.Model):
     email_use_tls = models.BooleanField(default=True)
     email_from = models.CharField(max_length=255, blank=True, default="")
 
+    # Язык установки: на нём открываются экраны, где организации ещё нет, —
+    # логин, сброс пароля, мастер первого запуска, — и он же служит умолчанием
+    # для организаций, которые своего языка не выбрали.
+    default_language = models.CharField(max_length=5, blank=True, default="ru")
+
     # Адреса TURN-серверов для звонков через relay. Секрет сюда не пишется:
     # он общий с coturn и живёт в томе секретов, чтобы не вводить его дважды.
     turn_urls = models.TextField(blank=True, default="")
@@ -107,6 +112,30 @@ def accepted_hosts() -> tuple[str, ...]:
     return tuple(host for host in _hosts() if host)
 
 
+def default_language() -> str:
+    """Язык установки: экраны до входа и умолчание для организаций.
+
+    Читается без кэша, в отличие от адреса. Кэш с TTL здесь означал бы, что
+    один и тот же запрос стоит то одного запроса к базе, то нуля — в зависимости
+    от того, попал ли он в окно, — и язык установки некоторое время оставался бы
+    старым в тех процессах, которые смены не видели. Цена честности — один
+    поиск singleton-строки по первичному ключу, и только у запросов, которые
+    вообще досюда дошли: у сотрудника со своим языком и у организации со своим
+    до этой ветки дело не доходит.
+
+    Пустая строка означает установку, где язык ещё ни разу не задавали, — и
+    приводит к языку по умолчанию из ``chatballs.i18n``.
+    """
+
+    from chatballs.i18n.languages import normalize_language
+
+    try:
+        row = InstanceSettings.objects.filter(pk=InstanceSettings.SINGLETON_PK).first()
+    except Exception:  # таблицы ещё нет (первые миграции)
+        return ""
+    return normalize_language(row.default_language) if row is not None else ""
+
+
 def remember_public_host(raw_host: str, scheme: str = "http") -> None:
     """Запомнить адрес, на котором прошли мастер, если он ещё не задан."""
 
diff --git a/apps/backend/chatballs/identity/instance_views.py b/apps/backend/chatballs/identity/instance_views.py
index b52ddd6..36f88b4 100644
--- a/apps/backend/chatballs/identity/instance_views.py
+++ b/apps/backend/chatballs/identity/instance_views.py
@@ -13,6 +13,8 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from chatballs.api.permissions import HasCapability
+from chatballs.i18n import t
+from chatballs.i18n.languages import DEFAULT_LANGUAGE, LANGUAGES, normalize_language
 from chatballs.identity.instance_settings import (
     InstanceSettings,
     email_connection,
@@ -30,6 +32,9 @@ def instance_payload(row: InstanceSettings) -> dict:
         "publicHost": row.public_host,
         "publicScheme": row.public_scheme or "http",
         "publicUrl": public_base_url(),
+        # Язык экранов, где организации ещё нет: логин, сброс пароля, мастер.
+        "defaultLanguage": row.default_language or DEFAULT_LANGUAGE,
+        "languages": [{"code": code, "label": label} for code, label in LANGUAGES],
         "updatedAt": row.updated_at,
         "email": {
             "host": row.email_host,
@@ -70,31 +75,43 @@ class InstanceAddressView(APIView):
             raw_host = raw_host.split("//", 1)[1]
         host = normalize_domain(raw_host.split("/", 1)[0].split(":", 1)[0])
         if not host:
-            errors["publicHost"] = "Укажите адрес установки"
+            errors["publicHost"] = t("settings.address_required")
         else:
             try:
                 # IP-адрес — обычный случай коробки: домена может не быть вовсе.
                 if not _looks_like_ipv4(host):
                     validate_domain(host)
             except ValidationError:
-                errors["publicHost"] = "Некорректный адрес"
+                errors["publicHost"] = t("settings.invalid_address")
 
         scheme = str(body.get("publicScheme", row.public_scheme or "http")).lower()
         if scheme not in SCHEMES:
-            errors["publicScheme"] = "http или https"
+            errors["publicScheme"] = t("settings.http_or_https")
+
+        raw_language = str(body.get("defaultLanguage", row.default_language)).strip()
+        language = normalize_language(raw_language)
+        if raw_language and not language:
+            errors["defaultLanguage"] = t("settings.language_unsupported")
 
         if errors:
             return Response(
                 {"detail": next(iter(errors.values())), "errors": errors}, status=400
             )
 
-        fields = ["public_host", "public_scheme", "previous_public_host", "updated_at"]
+        fields = [
+            "public_host",
+            "public_scheme",
+            "previous_public_host",
+            "default_language",
+            "updated_at",
+        ]
         if host != row.public_host:
             # Прежний адрес остаётся принятым: владелец меняет адрес заранее,
             # сидя на старом, и не должен выпасть из установки в тот же миг.
             row.previous_public_host = row.public_host
         row.public_host = host
         row.public_scheme = scheme
+        row.default_language = language or DEFAULT_LANGUAGE
 
         email = body.get("email")
         if isinstance(email, dict):
@@ -106,7 +123,7 @@ class InstanceAddressView(APIView):
                 row.email_port = int(email.get("port", row.email_port))
             except (TypeError, ValueError):
                 return Response(
-                    {"detail": "Порт — число", "errors": {"emailPort": "Порт — число"}},
+                    {"detail": t("settings.port_is_number"), "errors": {"emailPort": t("settings.port_is_number")}},
                     status=400,
                 )
             # Пустой пароль означает «оставить прежний»: наружу он не отдаётся.
@@ -131,7 +148,7 @@ class InstanceAddressView(APIView):
                 row.turn_ttl_seconds = max(60, int(turn.get("ttlSeconds", row.turn_ttl_seconds)))
             except (TypeError, ValueError):
                 return Response(
-                    {"detail": "Время жизни — число секунд",
+                    {"detail": t("settings.ttl_is_seconds"),
                      "errors": {"turnTtlSeconds": "Число секунд"}},
                     status=400,
                 )
@@ -163,7 +180,7 @@ class InstanceEmailCheckView(APIView):
         connection = email_connection()
         if connection is None:
             return Response(
-                {"detail": "Сначала укажите сервер исходящей почты"}, status=400
+                {"detail": t("settings.smtp_required_first")}, status=400
             )
         recipient = str(request.data.get("email", "")).strip() or request.user.email
         try:
diff --git a/apps/backend/chatballs/identity/migrations/0035_language_settings.py b/apps/backend/chatballs/identity/migrations/0035_language_settings.py
new file mode 100644
index 0000000..96dc01c
--- /dev/null
+++ b/apps/backend/chatballs/identity/migrations/0035_language_settings.py
@@ -0,0 +1,28 @@
+# Generated by Django 5.2.17 on 2026-09-09 18:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('identity', '0034_encrypted_column_widths'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='humanuser',
+            name='ui_language',
+            field=models.CharField(blank=True, default='', max_length=5),
+        ),
+        migrations.AddField(
+            model_name='instancesettings',
+            name='default_language',
+            field=models.CharField(blank=True, default='ru', max_length=5),
+        ),
+        migrations.AddField(
+            model_name='organization',
+            name='language',
+            field=models.CharField(blank=True, default='', max_length=5),
+        ),
+    ]
diff --git a/apps/backend/chatballs/identity/models.py b/apps/backend/chatballs/identity/models.py
index 9fc9e0a..74b13e3 100644
--- a/apps/backend/chatballs/identity/models.py
+++ b/apps/backend/chatballs/identity/models.py
@@ -78,6 +78,12 @@ class HumanUser(AbstractUser):
     # тема и акцентный HEX-цвет; пустой акцент — дефолтный синий #1677ff.
     ui_theme = models.CharField(max_length=8, choices=UiTheme.choices, default=UiTheme.SYSTEM)
     ui_accent = models.CharField(max_length=9, blank=True)
+    # Язык интерфейса — тоже глобальная настройка пользователя, а не
+    # membership: человек читает на одном языке во всех организациях, куда
+    # входит. Пустая строка — «как в организации»: это не английский и не
+    # русский, а отсутствие личного выбора, и она переживает смену языка
+    # организации, тогда как записанный при регистрации код — нет.
+    ui_language = models.CharField(max_length=5, blank=True, default="")
     # Фото сотрудника (дизайн-базлайн v2): видно коллегам в сайдбаре, подписи
     # сообщений, выборе ответственного. Загружается в профиле.
     avatar = models.FileField(upload_to=user_avatar_upload_path, storage=user_storage, max_length=512, blank=True, default="")
@@ -115,6 +121,11 @@ class Organization(models.Model):
     )
     timezone = models.CharField(max_length=64, default="Europe/Moscow")
     currency = models.CharField(max_length=3, default="RUB")
+    # Язык рабочего места по умолчанию: на нём организация открывается всем,
+    # кто не выбрал свой в профиле. Стоит рядом с часовым поясом и валютой —
+    # это такой же региональный параметр организации, и в «Настройках» они
+    # лежат в одном разделе.
+    language = models.CharField(max_length=5, blank=True, default="")
     logo = models.FileField(
         upload_to=organization_logo_upload_path,
         max_length=512,
diff --git a/apps/backend/chatballs/identity/password_validation.py b/apps/backend/chatballs/identity/password_validation.py
index b0db1e6..a7c43cb 100644
--- a/apps/backend/chatballs/identity/password_validation.py
+++ b/apps/backend/chatballs/identity/password_validation.py
@@ -2,6 +2,8 @@ import re
 
 from django.core.exceptions import ValidationError
 
+from chatballs.i18n import t
+
 # Единые правила сложности пароля, зеркалят клиентскую проверку internal-ui.
 _LETTER = re.compile(r"[A-Za-zА-Яа-я]")
 _DIGIT = re.compile(r"\d")
@@ -13,11 +15,11 @@ class PasswordComplexityValidator:
 
     def validate(self, password: str, user: object = None) -> None:
         if not _LETTER.search(password):
-            raise ValidationError("Пароль должен содержать букву.", code="password_no_letter")
+            raise ValidationError(t("identity.password_needs_letter"), code="password_no_letter")
         if not _DIGIT.search(password):
-            raise ValidationError("Пароль должен содержать цифру.", code="password_no_digit")
+            raise ValidationError(t("identity.password_needs_digit"), code="password_no_digit")
         if not _SPECIAL.search(password):
-            raise ValidationError("Пароль должен содержать спецсимвол.", code="password_no_special")
+            raise ValidationError(t("identity.password_needs_special"), code="password_no_special")
 
     def get_help_text(self) -> str:
         return "Пароль должен содержать букву, цифру и спецсимвол."
diff --git a/apps/backend/chatballs/identity/setup.py b/apps/backend/chatballs/identity/setup.py
index a67c077..bcc54ea 100644
--- a/apps/backend/chatballs/identity/setup.py
+++ b/apps/backend/chatballs/identity/setup.py
@@ -22,6 +22,7 @@ from django.db import connections, transaction
 from django.utils.text import slugify
 
 from chatballs.ai.knowledge_categories import ensure_uncategorized_category
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.identity.instance_settings import remember_public_host
 from chatballs.identity.models import (
@@ -76,7 +77,7 @@ def _clean(data: SetupInput) -> SetupInput:
     errors: dict[str, str] = {}
     organization_name = data.organization_name.strip()
     if not organization_name:
-        errors["organizationName"] = "Укажите название организации"
+        errors["organizationName"] = t("admin.organization_name_required")
     elif len(organization_name) > ORGANIZATION_NAME_MAX_LENGTH:
         errors["organizationName"] = "Название длиннее 255 символов"
     full_name = " ".join(data.full_name.split())
diff --git a/apps/backend/chatballs/identity/setup_views.py b/apps/backend/chatballs/identity/setup_views.py
index 0c185ee..8b81fbf 100644
--- a/apps/backend/chatballs/identity/setup_views.py
+++ b/apps/backend/chatballs/identity/setup_views.py
@@ -8,6 +8,7 @@ from rest_framework.response import Response
 from rest_framework.throttling import ScopedRateThrottle
 from rest_framework.views import APIView
 
+from chatballs.i18n import t
 from chatballs.identity.auth.common import _user_payload
 from chatballs.identity.setup import (
     SetupAlreadyCompleted,
@@ -16,7 +17,10 @@ from chatballs.identity.setup import (
     instance_needs_setup,
 )
 
-SETUP_CLOSED = {"detail": "Первый запуск уже выполнен: организация создана"}
+
+# Функция, а не константа: язык запроса решается на каждый запрос заново.
+def setup_closed() -> dict[str, str]:
+    return {"detail": t("identity.setup_already_done")}
 
 
 def _validation_response(error: ValidationError) -> Response:
@@ -54,7 +58,7 @@ class SetupView(APIView):
     def post(self, request: Request) -> Response:
         body = request.data if isinstance(request.data, dict) else {}
         if not instance_needs_setup():
-            return Response(SETUP_CLOSED, status=409)
+            return Response(setup_closed(), status=409)
         try:
             result = complete_setup(
                 SetupInput(
@@ -68,7 +72,7 @@ class SetupView(APIView):
                 public_scheme=request.scheme,
             )
         except SetupAlreadyCompleted:
-            return Response(SETUP_CLOSED, status=409)
+            return Response(setup_closed(), status=409)
         except ValidationError as error:
             return _validation_response(error)
         owner = result.owner
diff --git a/apps/backend/chatballs/identity/test_administration_api.py b/apps/backend/chatballs/identity/test_administration_api.py
index 1bb9a00..ca559f3 100644
--- a/apps/backend/chatballs/identity/test_administration_api.py
+++ b/apps/backend/chatballs/identity/test_administration_api.py
@@ -61,6 +61,8 @@ class AdministrationApiTests(TestCase):
                 "name": "Example",
                 "timezone": "Europe/Moscow",
                 "currency": "RUB",
+                # Пустой язык — «как в установке»: организация своего не выбрала.
+                "language": "",
                 "logoUrl": None,
                 # Подпись «Сохранено …» у кнопки (кадр N1): пока правок не было — null.
                 "updatedAt": None,
diff --git a/apps/backend/chatballs/identity/tests.py b/apps/backend/chatballs/identity/tests.py
index 1aa9b24..9dd3b09 100644
--- a/apps/backend/chatballs/identity/tests.py
+++ b/apps/backend/chatballs/identity/tests.py
@@ -325,6 +325,45 @@ class AuthEndpointTests(TestCase):
                 )
                 self.assertEqual(rejected.status_code, 400)
 
+    def test_profile_language_saves_personal_choice(self) -> None:
+        """Язык — личная настройка; пустое значение возвращает к организации."""
+
+        self.client.login(username="owner@example.com", password="temporary-password")
+
+        response = self.client.post(
+            "/api/v1/auth/profile/language/",
+            data=json.dumps({"language": "en"}),
+            content_type="application/json",
+        )
+
+        self.assertEqual(response.status_code, 200)
+        payload = response.json()["user"]
+        self.assertEqual(payload["uiLanguage"], "en")
+        # Ответ уже на новом языке: интерфейс перерисуется по нему сразу.
+        self.assertEqual(payload["language"], "en")
+        owner = HumanUser.objects.get(email="owner@example.com")
+        self.assertEqual(owner.ui_language, "en")
+        self.assertTrue(
+            AuditEvent.objects.filter(action="identity.profile_language_changed").exists()
+        )
+
+        cleared = self.client.post(
+            "/api/v1/auth/profile/language/",
+            data=json.dumps({"language": ""}),
+            content_type="application/json",
+        )
+        self.assertEqual(cleared.status_code, 200)
+        # Пустая строка — не язык, а снятие личного выбора: человек снова едет
+        # за организацией.
+        self.assertEqual(cleared.json()["user"]["uiLanguage"], "")
+
+        rejected = self.client.post(
+            "/api/v1/auth/profile/language/",
+            data=json.dumps({"language": "de"}),
+            content_type="application/json",
+        )
+        self.assertEqual(rejected.status_code, 400)
+
     def test_profile_password_changes_current_user_password(self) -> None:
         self.client.login(username="owner@example.com", password="temporary-password")
 
diff --git a/apps/backend/chatballs/integrations/feature_views.py b/apps/backend/chatballs/integrations/feature_views.py
index 2473a7a..cd136f6 100644
--- a/apps/backend/chatballs/integrations/feature_views.py
+++ b/apps/backend/chatballs/integrations/feature_views.py
@@ -11,6 +11,7 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from chatballs.api.permissions import HasCapability
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.integrations.features import supports_calls
 from chatballs.integrations.models import Integration, IntegrationKind
@@ -50,7 +51,7 @@ class CommunicationSettingsView(APIView):
         organization = request.tenant_context.organization
         items = request.data.get("items")
         if not isinstance(items, list):
-            return Response({"detail": "Ожидается список items"}, status=400)
+            return Response({"detail": t("settings.items_list_expected")}, status=400)
         by_id = {i.id: i for i in _entry_points(organization)}
         changed: list[dict[str, object]] = []
         for raw in items:
@@ -58,7 +59,7 @@ class CommunicationSettingsView(APIView):
                 continue
             integration = by_id.get(raw.get("id"))
             if integration is None:
-                return Response({"detail": "Точка входа не найдена"}, status=404)
+                return Response({"detail": t("settings.entry_point_not_found")}, status=404)
             fields: list[str] = []
             for key, attr in (("voiceMessages", "voice_messages_enabled"), ("audioCalls", "audio_calls_enabled"), ("videoCalls", "video_calls_enabled")):
                 if key in raw:
diff --git a/apps/backend/chatballs/integrations/proxy.py b/apps/backend/chatballs/integrations/proxy.py
index 214dc27..4b4130b 100644
--- a/apps/backend/chatballs/integrations/proxy.py
+++ b/apps/backend/chatballs/integrations/proxy.py
@@ -18,6 +18,7 @@ import ssl
 import urllib.parse
 import urllib.request
 
+from chatballs.i18n import t
 from chatballs.integrations.outbound import OutboundUrlRejected
 
 SOCKS_SCHEMES = ("socks5", "socks5h")
@@ -158,7 +159,7 @@ def _import_socks():
 
         return socks
     except ImportError as error:
-        raise ValueError("Для SOCKS-прокси нужна зависимость PySocks (pip install PySocks)") from error
+        raise ValueError(t("settings.socks_needs_pysocks")) from error
 
 
 class _SocksHTTPConnection(http.client.HTTPConnection):
diff --git a/apps/backend/chatballs/integrations/views.py b/apps/backend/chatballs/integrations/views.py
index 84bc8de..3b13d7e 100644
--- a/apps/backend/chatballs/integrations/views.py
+++ b/apps/backend/chatballs/integrations/views.py
@@ -5,6 +5,7 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 
 from chatballs.api.permissions import HasCapability
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.integrations.models import Integration
 from chatballs.integrations.selectors import (
@@ -115,7 +116,7 @@ class IntegrationDetailView(APIView):
                 data=_input(request.data, current=integration),
             )
         except Integration.DoesNotExist:
-            return Response({"detail": "Интеграция не найдена"}, status=404)
+            return Response({"detail": t("settings.integration_not_found")}, status=404)
         except (ValidationError, IntegrityError) as error:
             return _validation_error(error)
         _audit(request, "integrations.integration_updated", integration)
@@ -125,7 +126,7 @@ class IntegrationDetailView(APIView):
         try:
             integration = self._get(request, integration_id)
         except Integration.DoesNotExist:
-            return Response({"detail": "Интеграция не найдена"}, status=404)
+            return Response({"detail": t("settings.integration_not_found")}, status=404)
         _audit(request, "integrations.integration_deleted", integration)
         delete_integration(context=request.tenant_context, integration=integration)
         return Response(status=204)
@@ -141,7 +142,7 @@ class IntegrationTestView(APIView):
                 context=request.tenant_context, integration_id=integration_id
             )
         except Integration.DoesNotExist:
-            return Response({"detail": "Интеграция не найдена"}, status=404)
+            return Response({"detail": t("settings.integration_not_found")}, status=404)
         integration = test_integration(
             context=request.tenant_context, integration=integration
         )
diff --git a/apps/backend/chatballs/notifications/migrations/0010_i18n_events.py b/apps/backend/chatballs/notifications/migrations/0010_i18n_events.py
new file mode 100644
index 0000000..098842d
--- /dev/null
+++ b/apps/backend/chatballs/notifications/migrations/0010_i18n_events.py
@@ -0,0 +1,28 @@
+# Generated by Django 5.2.17 on 2026-09-09 19:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('notifications', '0009_alter_notification_type'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='notification',
+            name='body_key',
+            field=models.CharField(blank=True, default='', max_length=64),
+        ),
+        migrations.AddField(
+            model_name='notification',
+            name='text_params',
+            field=models.JSONField(blank=True, default=dict),
+        ),
+        migrations.AddField(
+            model_name='notification',
+            name='title_key',
+            field=models.CharField(blank=True, default='', max_length=64),
+        ),
+    ]
diff --git a/apps/backend/chatballs/notifications/models.py b/apps/backend/chatballs/notifications/models.py
index 700715c..193edeb 100644
--- a/apps/backend/chatballs/notifications/models.py
+++ b/apps/backend/chatballs/notifications/models.py
@@ -33,8 +33,16 @@ class Notification(models.Model):
     organization = models.ForeignKey("identity.Organization", on_delete=models.PROTECT, related_name="notifications")
     type = models.CharField(max_length=32, choices=NotificationType.choices)
     level = models.CharField(max_length=16, choices=NotificationLevel.choices, default=NotificationLevel.INFO)
+    # Текст на языке того, кто писал код: остаётся и для записей, сделанных
+    # до появления ключей, и для доставки в мессенджер, где рендерить нечем.
     title = models.CharField(max_length=255)
     body = models.TextField(blank=True)
+    # Ключи каталога и их параметры. Уведомление адресовано аудитории
+    # («операторам»), а не одному человеку, и разные операторы могут читать на
+    # разных языках — поэтому фраза собирается при показе, а не при записи.
+    title_key = models.CharField(max_length=64, blank=True, default="")
+    body_key = models.CharField(max_length=64, blank=True, default="")
+    text_params = models.JSONField(default=dict, blank=True)
     # Диплинк по клику.
     target_route = models.CharField(max_length=64, blank=True)
     target_id = models.CharField(max_length=64, blank=True)
diff --git a/apps/backend/chatballs/notifications/serializers.py b/apps/backend/chatballs/notifications/serializers.py
index 59f11e2..d8f70b7 100644
--- a/apps/backend/chatballs/notifications/serializers.py
+++ b/apps/backend/chatballs/notifications/serializers.py
@@ -1,13 +1,27 @@
+from chatballs.i18n import t
 from chatballs.notifications.models import Notification
 
 
+def _text(key: str, stored: str, params: dict) -> str:
+    """Фраза на языке запроса, если у записи есть ключ каталога.
+
+    Уведомление адресовано аудитории, а не одному человеку: два оператора
+    одной организации могут читать на разных языках, и записать готовую фразу
+    в момент события нельзя. Записи, сделанные до появления ключей, приходят
+    сохранённым текстом — переписывать историю задним числом не за что.
+    """
+
+    return t(key, **params) if key else stored
+
+
 def notification_payload(notification: Notification, *, unread: bool) -> dict[str, object]:
+    params = notification.text_params or {}
     return {
         "id": notification.id,
         "type": notification.type,
         "level": notification.level,
-        "title": notification.title,
-        "body": notification.body,
+        "title": _text(notification.title_key, notification.title, params),
+        "body": _text(notification.body_key, notification.body, params),
         "targetRoute": notification.target_route,
         "targetId": notification.target_id,
         "createdAt": notification.created_at.isoformat(),
diff --git a/apps/backend/chatballs/notifications/services.py b/apps/backend/chatballs/notifications/services.py
index 1de1bb1..41194b6 100644
--- a/apps/backend/chatballs/notifications/services.py
+++ b/apps/backend/chatballs/notifications/services.py
@@ -31,6 +31,9 @@ def notify(
     audience: str,
     title: str,
     body: str = "",
+    title_key: str = "",
+    body_key: str = "",
+    text_params: dict | None = None,
     target_id: object = "",
     recipient_user=None,
     source_type: str = "",
@@ -51,6 +54,9 @@ def notify(
         audience=audience,
         title=title,
         body=body,
+        title_key=title_key,
+        body_key=body_key,
+        text_params=text_params or {},
         level=level or meta.get("level", NotificationLevel.INFO),
         target_route=target_route,
         target_id=str(target_id) if target_id else "",
diff --git a/apps/backend/chatballs/notifications/views.py b/apps/backend/chatballs/notifications/views.py
index cc1576c..57c03a2 100644
--- a/apps/backend/chatballs/notifications/views.py
+++ b/apps/backend/chatballs/notifications/views.py
@@ -3,6 +3,7 @@ from rest_framework.request import Request
 from rest_framework.response import Response
 from rest_framework.views import APIView
 
+from chatballs.i18n import t
 from chatballs.notifications.binding import deep_link, issue_binding_code, notifier_integrations
 from chatballs.notifications.models import MessengerBinding, NotificationRead, NotificationType
 from chatballs.notifications.selectors import unread_for, visible_for
@@ -69,7 +70,7 @@ class MessengerBindingDetailView(APIView):
         """Выдать одноразовый код привязки и deep-link на бота."""
         integration = self._integration(request, integration_id)
         if integration is None:
-            return Response({"detail": "Бот уведомлений не найден"}, status=404)
+            return Response({"detail": t("profile.notification_bot_not_found")}, status=404)
         binding_code = issue_binding_code(
             context=request.tenant_context, integration=integration
         )
@@ -86,7 +87,7 @@ class MessengerBindingDetailView(APIView):
         """Обновить типы уведомлений, доставляемые в мессенджер."""
         binding = MessengerBinding.objects.filter(user=request.user, integration_id=integration_id).first()
         if binding is None:
-            return Response({"detail": "Привязка не найдена"}, status=404)
+            return Response({"detail": t("profile.link_not_found")}, status=404)
         types = request.data.get("pushTypes")
         if not isinstance(types, list):
             return Response({"detail": "pushTypes must be a list"}, status=400)
diff --git a/apps/backend/chatballs/support_portals/addressing.py b/apps/backend/chatballs/support_portals/addressing.py
index 7bc9e74..f1c4729 100644
--- a/apps/backend/chatballs/support_portals/addressing.py
+++ b/apps/backend/chatballs/support_portals/addressing.py
@@ -6,6 +6,8 @@ from django.conf import settings
 from django.core.exceptions import ValidationError
 from django.db import models
 
+from chatballs.i18n import t
+
 HOST_LABEL_RE = re.compile(r"^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$")
 
 
@@ -16,10 +18,10 @@ def normalize_domain(value: str) -> str:
 def validate_domain(value: str) -> str:
     domain = normalize_domain(value)
     if not domain or len(domain) > 253:
-        raise ValidationError("Некорректное доменное имя")
+        raise ValidationError(t("portals.invalid_domain"))
     labels = domain.split(".")
     if len(labels) < 2 or any(not HOST_LABEL_RE.fullmatch(label) for label in labels):
-        raise ValidationError("Некорректное доменное имя")
+        raise ValidationError(t("portals.invalid_domain"))
     return domain
 
 
diff --git a/apps/backend/chatballs/support_portals/article_import_views.py b/apps/backend/chatballs/support_portals/article_import_views.py
index a854b3d..98583a4 100644
--- a/apps/backend/chatballs/support_portals/article_import_views.py
+++ b/apps/backend/chatballs/support_portals/article_import_views.py
@@ -1,6 +1,7 @@
 from rest_framework.request import Request
 from rest_framework.response import Response
 
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.support_portals.article_import import import_articles
 from chatballs.support_portals.portal_views import PortalBaseView
@@ -10,7 +11,7 @@ class ArticleImportView(PortalBaseView):
     def post(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         articles = request.data.get("articles")
         if not isinstance(articles, list) or not articles:
             return Response({"detail": "articles must be a non-empty list"}, status=400)
diff --git a/apps/backend/chatballs/support_portals/content_services.py b/apps/backend/chatballs/support_portals/content_services.py
index 96f8009..73c05aa 100644
--- a/apps/backend/chatballs/support_portals/content_services.py
+++ b/apps/backend/chatballs/support_portals/content_services.py
@@ -8,6 +8,7 @@ from django.utils.text import slugify
 
 from chatballs.ai.indexing import reindex_portal_article
 from chatballs.conversations.transports.base import guess_content_type, safe_filename
+from chatballs.i18n import t
 from chatballs.support_portals.content_markdown import normalize_file_links
 from chatballs.support_portals.models import (
     PortalArticle,
@@ -193,7 +194,7 @@ def _category(portal: SupportPortal, category_id) -> PortalCategory:
     try:
         return portal.categories.get(id=int(category_id))
     except (PortalCategory.DoesNotExist, TypeError, ValueError) as error:
-        raise ValidationError({"categoryId": "Раздел не найден"}) from error
+        raise ValidationError({"categoryId": t("portals.section_not_found")}) from error
 
 
 def ensure_portal_editable(portal: SupportPortal) -> None:
diff --git a/apps/backend/chatballs/support_portals/content_views.py b/apps/backend/chatballs/support_portals/content_views.py
index 324f163..387b367 100644
--- a/apps/backend/chatballs/support_portals/content_views.py
+++ b/apps/backend/chatballs/support_portals/content_views.py
@@ -4,6 +4,7 @@ from rest_framework.request import Request
 from rest_framework.response import Response
 
 from chatballs.api.pagination import page_payload, paginate
+from chatballs.i18n import t
 from chatballs.support_portals.api import validation_response
 from chatballs.support_portals.content_services import (
     add_article_file,
@@ -47,7 +48,7 @@ class CategoryListView(PortalBaseView):
     def get(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         counts = category_article_counts(portal)
         return Response(
             {
@@ -61,7 +62,7 @@ class CategoryListView(PortalBaseView):
     def post(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         try:
             category = create_category(
                 context=request.tenant_context,
@@ -71,7 +72,7 @@ class CategoryListView(PortalBaseView):
         except (ValidationError, TypeError, ValueError) as error:
             if isinstance(error, ValidationError):
                 return validation_response(error)
-            return Response({"detail": "Некорректная категория"}, status=400)
+            return Response({"detail": t("portals.invalid_category")}, status=400)
         return Response({"category": category_payload(category)}, status=201)
 
 
@@ -87,9 +88,9 @@ class CategoryDetailView(PortalBaseView):
     ) -> Response:
         portal, category = self._category(request, portal_id, category_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         if category is None:
-            return Response({"detail": "Раздел не найден"}, status=404)
+            return Response({"detail": t("portals.section_not_found")}, status=404)
         try:
             category = update_category(
                 portal=portal, category=category, data=request.data
@@ -97,7 +98,7 @@ class CategoryDetailView(PortalBaseView):
         except (ValidationError, TypeError, ValueError) as error:
             if isinstance(error, ValidationError):
                 return validation_response(error)
-            return Response({"detail": "Некорректный раздел"}, status=400)
+            return Response({"detail": t("portals.invalid_section")}, status=400)
         return Response({"category": category_payload(category)})
 
     def delete(
@@ -105,9 +106,9 @@ class CategoryDetailView(PortalBaseView):
     ) -> Response:
         portal, category = self._category(request, portal_id, category_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         if category is None:
-            return Response({"detail": "Раздел не найден"}, status=404)
+            return Response({"detail": t("portals.section_not_found")}, status=404)
         try:
             delete_category(portal=portal, category=category)
         except ValidationError as error:
@@ -119,7 +120,7 @@ class ArticleListView(PortalBaseView):
     def get(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         """Страница библиотеки: категория, язык, статус и поиск — на сервере."""
         page = paginate(
             portal_articles_queryset(portal, request.query_params),
@@ -131,7 +132,7 @@ class ArticleListView(PortalBaseView):
     def post(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         try:
             article = create_article(
                 context=request.tenant_context,
@@ -141,7 +142,7 @@ class ArticleListView(PortalBaseView):
         except (ValidationError, TypeError, ValueError) as error:
             if isinstance(error, ValidationError):
                 return validation_response(error)
-            return Response({"detail": "Некорректная статья"}, status=400)
+            return Response({"detail": t("portals.invalid_article")}, status=400)
         article = _article(portal, article.id)
         return Response(
             {"article": article_payload(article, revisions=True, files=True)},
@@ -153,25 +154,25 @@ class ArticleDetailView(PortalBaseView):
     def get(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         return Response({"article": article_payload(article, revisions=True, files=True)})
 
     def patch(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         try:
             article = update_article(article=article, data=request.data)
         except (ValidationError, TypeError, ValueError) as error:
             if isinstance(error, ValidationError):
                 return validation_response(error)
-            return Response({"detail": "Некорректные данные статьи"}, status=400)
+            return Response({"detail": t("portals.invalid_article_data")}, status=400)
         article = _article(portal, article.id)
         return Response({"article": article_payload(article, revisions=True, files=True)})
 
@@ -180,10 +181,10 @@ class ArticleRevisionListView(PortalBaseView):
     def post(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         try:
             revision = add_revision(
                 context=request.tenant_context,
@@ -200,10 +201,10 @@ class ArticlePublishView(PortalBaseView):
     def post(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         try:
             article = publish_revision(
                 article=article,
@@ -212,7 +213,7 @@ class ArticlePublishView(PortalBaseView):
         except (ValidationError, TypeError, ValueError) as error:
             if isinstance(error, ValidationError):
                 return validation_response(error)
-            return Response({"detail": "Некорректная версия"}, status=400)
+            return Response({"detail": t("portals.invalid_revision")}, status=400)
         article = _article(portal, article.id)
         return Response({"article": article_payload(article, revisions=True, files=True)})
 
@@ -221,10 +222,10 @@ class ArticleArchiveView(PortalBaseView):
     def post(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         article = archive_article(article)
         return Response({"article": article_payload(article, revisions=True, files=True)})
 
@@ -237,10 +238,10 @@ class ArticleFileListView(PortalBaseView):
     def get(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         return Response(
             {"items": [article_file_payload(item) for item in article.files.all()]}
         )
@@ -248,14 +249,14 @@ class ArticleFileListView(PortalBaseView):
     def post(self, request: Request, portal_id: int, article_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         upload = request.FILES.get("file")
         if upload is None:
             return Response(
-                {"detail": "Нужен файл в поле file (multipart/form-data)"}, status=400
+                {"detail": t("portals.file_field_required")}, status=400
             )
         try:
             article_file = add_article_file(
@@ -275,13 +276,13 @@ class ArticleFileDetailView(PortalBaseView):
     ) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         article = _article(portal, article_id)
         if article is None:
-            return Response({"detail": "Статья не найдена"}, status=404)
+            return Response({"detail": t("portals.article_not_found")}, status=404)
         article_file = article.files.filter(id=file_id).first()
         if article_file is None:
-            return Response({"detail": "Файл не найден"}, status=404)
+            return Response({"detail": t("portals.file_not_found")}, status=404)
         try:
             delete_article_file(
                 context=request.tenant_context, article_file=article_file
diff --git a/apps/backend/chatballs/support_portals/portal_views.py b/apps/backend/chatballs/support_portals/portal_views.py
index 28a134f..1d244e5 100644
--- a/apps/backend/chatballs/support_portals/portal_views.py
+++ b/apps/backend/chatballs/support_portals/portal_views.py
@@ -6,6 +6,7 @@ from rest_framework.views import APIView
 
 from chatballs.api.pagination import page_payload, paginate
 from chatballs.api.permissions import HasCapability
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.integrations.models import IntegrationProvider, IntegrationStatus
 from chatballs.support_portals.api import validation_response
@@ -173,14 +174,14 @@ class PortalDetailView(PortalBaseView):
     def get(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         counts = portal_content_counts(request.tenant_context).get(portal.id, {})
         return Response({"portal": portal_payload(portal, counts=counts)})
 
     def patch(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         try:
             update_portal(
                 context=request.tenant_context,
@@ -197,7 +198,7 @@ class PortalStatusView(PortalBaseView):
     def post(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         try:
             portal = set_portal_status(
                 context=request.tenant_context,
@@ -224,7 +225,7 @@ class PortalWidgetOptionsView(PortalBaseView):
     def get(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         widgets = (
             WebChatWidget.objects.select_related(
                 "integration",
@@ -248,7 +249,7 @@ class PortalDomainView(PortalBaseView):
     def put(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         try:
             portal = set_custom_domain(
                 portal, str(request.data.get("customDomain", ""))
@@ -263,7 +264,7 @@ class PortalDomainVerifyView(PortalBaseView):
     def post(self, request: Request, portal_id: int) -> Response:
         portal = self.portal(request, portal_id)
         if portal is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         try:
             portal = verify_custom_domain(portal)
         except ValidationError as error:
diff --git a/apps/backend/chatballs/support_portals/public_views.py b/apps/backend/chatballs/support_portals/public_views.py
index 0af2129..d1c740c 100644
--- a/apps/backend/chatballs/support_portals/public_views.py
+++ b/apps/backend/chatballs/support_portals/public_views.py
@@ -4,6 +4,7 @@ from rest_framework.response import Response
 from rest_framework.throttling import ScopedRateThrottle
 from rest_framework.views import APIView
 
+from chatballs.i18n import t
 from chatballs.identity.models import Organization
 from chatballs.support_portals.content_services import record_feedback
 from chatballs.support_portals.models import SupportPortal
@@ -55,7 +56,7 @@ class PublicPortalDetailView(PublicPortalView):
     def get(self, request: Request) -> Response:
         resolved = self.resolve(request)
         if resolved is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         context, portal = resolved
         with tenant_atomic(context):
             counts = category_article_counts(portal, published_only=True)
@@ -76,7 +77,7 @@ class PublicArticleListView(PublicPortalView):
     def get(self, request: Request) -> Response:
         resolved = self.resolve(request)
         if resolved is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         context, portal = resolved
         locale = str(request.query_params.get("locale", portal.default_locale))
         with tenant_atomic(context):
@@ -90,7 +91,7 @@ class PublicArticleListView(PublicPortalView):
                 limit = min(max(int(request.query_params.get("limit", 50)), 1), 100)
                 offset = max(int(request.query_params.get("offset", 0)), 0)
             except (TypeError, ValueError):
-                return Response({"detail": "Некорректная пагинация"}, status=400)
+                return Response({"detail": t("portals.invalid_pagination")}, status=400)
             total = articles.count()
             page = articles[offset : offset + limit]
             return Response(
@@ -113,7 +114,7 @@ class PublicArticleDetailView(PublicPortalView):
     def get(self, request: Request, article_slug: str) -> Response:
         resolved = self.resolve(request)
         if resolved is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         context, portal = resolved
         locale = str(request.query_params.get("locale", portal.default_locale))
         with tenant_atomic(context):
@@ -121,7 +122,7 @@ class PublicArticleDetailView(PublicPortalView):
                 slug=article_slug
             ).first()
             if article is None:
-                return Response({"detail": "Статья не найдена"}, status=404)
+                return Response({"detail": t("portals.article_not_found")}, status=404)
             return Response({"article": public_article_payload(article)})
 
 
@@ -132,10 +133,10 @@ class PublicArticleFeedbackView(PublicPortalView):
     def post(self, request: Request, article_slug: str) -> Response:
         resolved = self.resolve(request)
         if resolved is None:
-            return Response({"detail": "Портал не найден"}, status=404)
+            return Response({"detail": t("portals.not_found")}, status=404)
         helpful = request.data.get("helpful")
         if not isinstance(helpful, bool):
-            return Response({"detail": "helpful должен быть boolean"}, status=400)
+            return Response({"detail": t("portals.helpful_must_be_boolean")}, status=400)
         context, portal = resolved
         locale = str(request.query_params.get("locale", portal.default_locale))
         with tenant_atomic(context):
@@ -143,6 +144,6 @@ class PublicArticleFeedbackView(PublicPortalView):
                 slug=article_slug
             ).first()
             if article is None:
-                return Response({"detail": "Статья не найдена"}, status=404)
+                return Response({"detail": t("portals.article_not_found")}, status=404)
             record_feedback(article, helpful)
             return Response({"ok": True}, status=201)
diff --git a/apps/backend/chatballs/tenancy/storage_migration.py b/apps/backend/chatballs/tenancy/storage_migration.py
index e80e544..c74cc7f 100644
--- a/apps/backend/chatballs/tenancy/storage_migration.py
+++ b/apps/backend/chatballs/tenancy/storage_migration.py
@@ -16,6 +16,7 @@ from django.core.files import File
 from django.utils import timezone
 
 from chatballs.events.handlers import register
+from chatballs.i18n import t
 from chatballs.tenancy import storage_settings as ss
 from chatballs.tenancy.context import TenantContext
 
@@ -38,7 +39,7 @@ def _local_keys(root: Path) -> list[str]:
 def migrate_local_to_s3(row: ss.StorageSettings, *, batch_progress: int = 25) -> int:
     config = ss.config_from_settings(row)
     if not config.s3_configured:
-        raise ValueError("S3 не настроено")
+        raise ValueError(t("settings.s3_not_configured"))
     s3 = ss.build_s3_storage(config)
     root = Path(settings.MEDIA_ROOT)
     keys = _local_keys(root)
diff --git a/apps/backend/chatballs/tenancy/storage_settings.py b/apps/backend/chatballs/tenancy/storage_settings.py
index 3ce4826..6d082c2 100644
--- a/apps/backend/chatballs/tenancy/storage_settings.py
+++ b/apps/backend/chatballs/tenancy/storage_settings.py
@@ -17,6 +17,7 @@ from django.core.exceptions import ValidationError
 from django.db import models
 from django.utils import timezone
 
+from chatballs.i18n import t
 from chatballs.identity.crypto import EncryptedCharField
 
 
@@ -158,7 +159,7 @@ def build_s3_storage(config: StorageConfig, *, probe: bool = False):
         from botocore.config import Config
         from storages.backends.s3 import S3Storage
     except ImportError as error:  # pragma: no cover - deployment guard
-        raise ValidationError("django-storages[s3] не установлен") from error
+        raise ValidationError(t("settings.storages_missing")) from error
     client_config = (
         Config(connect_timeout=5, read_timeout=10, retries={"max_attempts": 1})
         if probe
diff --git a/apps/backend/chatballs/tenancy/storage_views.py b/apps/backend/chatballs/tenancy/storage_views.py
index 5e3fa0f..0eea217 100644
--- a/apps/backend/chatballs/tenancy/storage_views.py
+++ b/apps/backend/chatballs/tenancy/storage_views.py
@@ -18,6 +18,7 @@ from rest_framework.views import APIView
 
 from chatballs.api.permissions import HasCapability
 from chatballs.events.services import DomainEvent, enqueue_event
+from chatballs.i18n import t
 from chatballs.identity.audit import record_audit_event
 from chatballs.tenancy import storage_settings as ss
 
@@ -91,7 +92,7 @@ class StorageSettingsView(APIView):
         body = request.data
         backend = str(body.get("backend") or row.backend).upper()
         if backend not in ss.StorageBackend.values:
-            return Response({"detail": "Неизвестный тип хранилища", "errors": {"backend": "LOCAL или S3"}}, status=400)
+            return Response({"detail": t("settings.unknown_storage_kind"), "errors": {"backend": "LOCAL или S3"}}, status=400)
         config = _apply_fields(row, body)
         if backend == ss.StorageBackend.S3:
             try:
@@ -150,9 +151,9 @@ class StorageMigrateView(APIView):
     def post(self, request: Request) -> Response:
         row = ss.StorageSettings.load()
         if row.backend != ss.StorageBackend.S3 or not row.s3_configured:
-            return Response({"detail": "Сначала включите и сохраните S3-хранилище"}, status=400)
+            return Response({"detail": t("settings.enable_s3_first")}, status=400)
         if row.migration_status == ss.StorageMigrationStatus.RUNNING:
-            return Response({"detail": "Перенос уже идёт"}, status=409)
+            return Response({"detail": t("settings.migration_running")}, status=409)
         row.migration_status = ss.StorageMigrationStatus.RUNNING
         row.migration_total = 0
         row.migration_done = 0
diff --git a/apps/backend/chatballs/webchat/services.py b/apps/backend/chatballs/webchat/services.py
index 3f4b0fa..1cc1915 100644
--- a/apps/backend/chatballs/webchat/services.py
+++ b/apps/backend/chatballs/webchat/services.py
@@ -18,6 +18,9 @@ from chatballs.conversations.models import (
     MessageKind,
 )
 from chatballs.conversations.transports.base import InboundMessage
+from chatballs.i18n import t
+from chatballs.i18n.languages import resolve_language
+from chatballs.identity.instance_settings import default_language
 from chatballs.integrations.features import features_payload
 from chatballs.integrations.models import Integration, IntegrationProvider
 from chatballs.tenancy.context import TenantContext
@@ -92,12 +95,20 @@ def public_config(*, context: TenantContext, widget: WebChatWidget, origin: str)
     for sib in Integration.objects.filter(channel=channel).exclude(id=integration.id):
         username = sib.config.get("bot_username")
         if sib.provider == IntegrationProvider.TELEGRAM and username:
-            fallback.append({"label": "Написать в Telegram", "url": f"https://t.me/{username}"})
+            fallback.append({"label": t("webchat.write_in_telegram"), "url": f"https://t.me/{username}"})
         elif sib.provider == IntegrationProvider.MAX and username:
-            fallback.append({"label": "Написать в MAX", "url": ""})
+            fallback.append({"label": t("webchat.write_in_max"), "url": ""})
     return {
         "available": True,
         "widgetKey": widget.public_key,
+        # Язык обвязки виджета — язык организации: на нём отвечают и агент, и
+        # оператор, и английская кнопка «Send» вокруг русских ответов выглядела
+        # бы ошибкой. Если организация языка не выбрала, берётся язык
+        # установки; пустое значение оставляет решение браузеру посетителя.
+        "language": resolve_language(
+            organization_language=context.organization.language,
+            instance_language=default_language(),
+        ),
         # Что разрешено в этой точке входа: виджет прячет микрофон при запрете.
         "features": features_payload(integration),
         "title": cfg.get("title") or channel.name,
diff --git a/apps/backend/chatballs/webchat/views.py b/apps/backend/chatballs/webchat/views.py
index 1bc3329..8299dff 100644
--- a/apps/backend/chatballs/webchat/views.py
+++ b/apps/backend/chatballs/webchat/views.py
@@ -14,6 +14,7 @@ from chatballs.conversations.attachment_views import (
 )
 from chatballs.conversations.models import Message, MessageKind
 from chatballs.conversations.voice_views import ALLOWED_AUDIO_TYPES, MAX_VOICE_BYTES
+from chatballs.i18n import t
 from chatballs.identity.models import Organization
 from chatballs.integrations.features import voice_messages_allowed
 from chatballs.integrations.models import IntegrationStatus
@@ -136,15 +137,15 @@ class WebchatSessionView(_Public):
         channel_code = str(request.data.get("channel", ""))
         with _resolved_web_widget(widget_key, channel_code) as (context, widget):
             if context is None or widget is None:
-                return Response({"detail": "Виджет недоступен"}, status=404)
+                return Response({"detail": t("webchat.widget_unavailable")}, status=404)
             if (
                 not widget.integration.channel.allow_anonymous_sessions
                 or not services.origin_allowed(widget, host_origin(request))
             ):
-                return Response({"detail": "Виджет недоступен"}, status=404)
+                return Response({"detail": t("webchat.widget_unavailable")}, status=404)
             result = services.issue_session(context=context, widget=widget)
             if result is None:
-                return Response({"detail": "Виджет недоступен"}, status=404)
+                return Response({"detail": t("webchat.widget_unavailable")}, status=404)
             return Response(result, status=201)
 
 
@@ -155,17 +156,17 @@ class WebchatMessagesView(_PublicSession):
     def post(self, request: Request) -> Response:
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             upload = request.FILES.get("audio")
             if upload is not None:
                 # Голосовое из виджета (дизайн-базлайн v2, кадр H).
                 if not voice_messages_allowed(session.connection):
-                    return Response({"detail": "Голосовые отключены"}, status=400)
+                    return Response({"detail": t("webchat.voice_off")}, status=400)
                 if upload.size > MAX_VOICE_BYTES:
-                    return Response({"detail": "Аудио больше 10 МБ"}, status=400)
+                    return Response({"detail": t("conversations.audio_too_large")}, status=400)
                 content_type = (upload.content_type or "audio/webm").split(";")[0]
                 if content_type not in ALLOWED_AUDIO_TYPES:
-                    return Response({"detail": "Неподдерживаемый формат аудио"}, status=400)
+                    return Response({"detail": t("conversations.audio_format_unsupported")}, status=400)
                 try:
                     duration = max(0, int(request.data.get("duration", 0)))
                 except (TypeError, ValueError):
@@ -192,14 +193,14 @@ class WebchatMessagesView(_PublicSession):
                 return Response({"ok": True}, status=201)
             text = str(request.data.get("text", "")).strip()
             if not text:
-                return Response({"detail": "Пустое сообщение"}, status=400)
+                return Response({"detail": t("ai.empty_message")}, status=400)
             services.post_message(session, text[:4000])
             return Response({"ok": True}, status=201)
 
     def get(self, request: Request) -> Response:
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             try:
                 since = int(request.GET.get("since", "0") or 0)
             except ValueError:
@@ -211,7 +212,7 @@ class WebchatMessageAudioView(_PublicSession):
     def get(self, request: Request, message_id: int) -> Response | FileResponse:
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             message = (
                 Message.objects.filter(
                     id=message_id,
@@ -223,7 +224,7 @@ class WebchatMessageAudioView(_PublicSession):
                 .first()
             )
             if message is None:
-                return Response({"detail": "Сообщение не найдено"}, status=404)
+                return Response({"detail": t("conversations.message_not_found")}, status=404)
             response = FileResponse(
                 message.audio.open("rb"),
                 content_type=message.audio_content_type or "audio/ogg",
@@ -236,7 +237,7 @@ class WebchatMessageAttachmentView(_PublicSession):
     def get(self, request: Request, message_id: int) -> Response | FileResponse:
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             message = (
                 Message.objects.filter(
                     id=message_id,
@@ -248,7 +249,7 @@ class WebchatMessageAttachmentView(_PublicSession):
                 .first()
             )
             if message is None:
-                return Response({"detail": "Сообщение не найдено"}, status=404)
+                return Response({"detail": t("conversations.message_not_found")}, status=404)
             response = attachment_response(message, inline="inline" in request.GET)
             response["Cache-Control"] = "private, max-age=3600"
             return response
@@ -258,10 +259,10 @@ class WebchatContactView(_PublicSession):
     def post(self, request: Request) -> Response:
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             phone = services.normalize_phone(str(request.data.get("phone", "")))
             if not phone:
-                return Response({"detail": "Некорректный номер телефона"}, status=400)
+                return Response({"detail": t("webchat.invalid_phone")}, status=400)
             services.post_contact(session, phone)
             return Response({"ok": True}, status=201)
 
@@ -274,11 +275,11 @@ class WebchatCallOpenView(_PublicSession):
 
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             try:
                 resolved = open_call_for_identity(identity=session.identity)
             except CallTokenError:
-                return Response({"detail": "Активное приглашение не найдено"}, status=404)
+                return Response({"detail": t("webchat.no_active_invite")}, status=404)
             response = Response(
                 {
                     "call": public_invite_payload(resolved.invite.call_session, resolved.invite.expires_at),
@@ -297,11 +298,11 @@ class WebchatCallDeclineView(_PublicSession):
 
         with _resolved_web_session(request) as (_context, session):
             if session is None:
-                return Response({"detail": "Сессия не найдена"}, status=401)
+                return Response({"detail": t("webchat.session_not_found")}, status=401)
             try:
                 decline_call_for_identity(identity=session.identity)
             except CallTokenError:
-                return Response({"detail": "Активное приглашение не найдено"}, status=404)
+                return Response({"detail": t("webchat.no_active_invite")}, status=404)
             except CallConflict as error:
                 return Response({"detail": str(error)}, status=409)
             return Response({"ok": True})
diff --git a/apps/backend/chatballs_backend/settings_base.py b/apps/backend/chatballs_backend/settings_base.py
index 8e3629e..d344765 100644
--- a/apps/backend/chatballs_backend/settings_base.py
+++ b/apps/backend/chatballs_backend/settings_base.py
@@ -5,6 +5,8 @@ from pathlib import Path
 
 from django.core.exceptions import ImproperlyConfigured
 
+from chatballs.i18n.languages import DEFAULT_LANGUAGE
+from chatballs.i18n.languages import LANGUAGES as CHATBALLS_LANGUAGES
 from chatballs_backend.settings_database import build_databases
 from chatballs_backend.settings_env import env_bool, env_list, env_secret
 from chatballs_backend.settings_storage import build_storage_settings
@@ -85,6 +87,9 @@ MIDDLEWARE = [
     "chatballs.identity.middleware.SessionActivityMiddleware",
     "chatballs.events.middleware.CorrelationIdMiddleware",
     "chatballs.tenancy.middleware.TenantContextMiddleware",
+    # Последней в цепочке — ближе всех к вьюхе: язык организации известен
+    # только после того, как TenantContextMiddleware её определил.
+    "chatballs.i18n.middleware.LanguageMiddleware",
 ]
 
 TEMPLATES = [
@@ -141,7 +146,13 @@ AUTH_PASSWORD_VALIDATORS = [
     {"NAME": "chatballs.identity.password_validation.PasswordComplexityValidator"},
 ]
 
-LANGUAGE_CODE = "ru-ru"
+# Язык — настройка продукта, а не окружения: его выбирает владелец в
+# «Настройках» и каждый сотрудник в профиле, а LANGUAGE_CODE остаётся только
+# последним рубежом для кода, который выполняется вне запроса (команды,
+# фоновые задачи). Список языков общий с каталогом chatballs.i18n, чтобы
+# добавление языка не требовало править настройки в двух местах.
+LANGUAGE_CODE = DEFAULT_LANGUAGE
+LANGUAGES = CHATBALLS_LANGUAGES
 TIME_ZONE = "Europe/Moscow"
 USE_I18N = True
 USE_TZ = True
diff --git a/apps/internal-ui/src/App.tsx b/apps/internal-ui/src/App.tsx
index b15daa4..a02f579 100644
--- a/apps/internal-ui/src/App.tsx
+++ b/apps/internal-ui/src/App.tsx
@@ -1,10 +1,13 @@
 import { ConfigProvider } from "antd";
+import enUS from "antd/locale/en_US";
+import ruRU from "antd/locale/ru_RU";
 import { useCallback, useEffect, useMemo, useState } from "react";
 
 import { buildTheme } from "@chatballs/ui";
 
 import { applyAppearance, DEFAULT_ACCENT, resolvedDark } from "./shared/appearance";
 
+import { acceptServerLanguage, language } from "./i18n";
 import { api, setActiveOrganization } from "./api/client";
 import { fetchAgentDirectory } from "./features/agents/model";
 import { canAccess, defaultRoute, isManager } from "./auth/access";
@@ -30,6 +33,10 @@ export function App() {
     () => buildTheme(resolvedDark(appearanceTheme), appearanceAccent),
     [appearanceTheme, appearanceAccent],
   );
+  // Свои строки antd — «Нет данных», подписи пагинации, календарь — берёт из
+  // собственных каталогов, и без locale остаётся английским посреди русского
+  // экрана. Язык здесь уже окончательный: смена приходит перезагрузкой.
+  const antdLocale = language() === "en" ? enUS : ruRU;
   const [user, setUser] = useState<SessionUser | null>(null);
   const [organizationPublicId, setOrganizationPublicId] = useState<string | null>(initialRoute.organizationPublicId);
   const [totpChallenge, setTotpChallenge] = useState<AuthChallenge | null>(null);
@@ -43,6 +50,10 @@ export function App() {
   const { navigate } = navigation;
 
   const useIdentity = useCallback((nextIdentity: AuthenticatedUser, requestedId: string | null) => {
+    // Язык приходит уже разрешённым сервером. Если он разошёлся с тем, на
+    // котором отрисован экран, страница перезагрузится — иначе половина
+    // подписей осталась бы на прежнем языке (см. комментарий в src/i18n).
+    acceptServerLanguage(nextIdentity.language);
     const activeUser = activateOrganization(nextIdentity, requestedId);
     setIdentity(nextIdentity);
     setUser(activeUser);
@@ -72,8 +83,11 @@ export function App() {
   }, [user]);
 
   useEffect(() => {
-    api<{ authenticated: boolean; user?: AuthenticatedUser }>("/api/v1/auth/session/")
+    api<{ authenticated: boolean; user?: AuthenticatedUser; language?: string }>("/api/v1/auth/session/")
       .then((payload) => {
+        // Язык установки приходит и для гостя: экран входа принадлежит коробке,
+        // и на английской машине он должен открываться на языке установки.
+        if (!payload.authenticated) acceptServerLanguage(payload.language);
         if (payload.authenticated && payload.user) {
           const activeUser = useIdentity(payload.user, initialRoute.organizationPublicId);
           if (activeUser && !initialRoute.organizationPublicId) {
@@ -133,16 +147,16 @@ export function App() {
 
   if (resetting) {
     return (
-      <ConfigProvider theme={antdTheme}>
+      <ConfigProvider theme={antdTheme} locale={antdLocale}>
         <AuthResetPassword onDone={() => { setResetting(false); window.history.replaceState({}, "", pathFromRoute("chat")); }} />
       </ConfigProvider>
     );
   }
 
-  if (sessionLoading) return <ConfigProvider theme={antdTheme}><LoadingScreen /></ConfigProvider>;
+  if (sessionLoading) return <ConfigProvider theme={antdTheme} locale={antdLocale}><LoadingScreen /></ConfigProvider>;
 
   return (
-    <ConfigProvider theme={antdTheme}>
+    <ConfigProvider theme={antdTheme} locale={antdLocale}>
       {totpChallenge ? (
         <AuthTotpCode challenge={totpChallenge} onVerified={(nextUser) => { setTotpChallenge(null); landAfterAuth(nextUser); }} />
       ) : !identity ? (
diff --git a/apps/internal-ui/src/api/client.ts b/apps/internal-ui/src/api/client.ts
index a6aed6f..d999148 100644
--- a/apps/internal-ui/src/api/client.ts
+++ b/apps/internal-ui/src/api/client.ts
@@ -1,3 +1,5 @@
+import { t } from "../i18n";
+
 const configuredApiBase = (import.meta.env.VITE_API_BASE_URL ?? "").replace(/\/+$/, "");
 let activeOrganizationPublicId: string | null = null;
 
@@ -37,7 +39,7 @@ export class ApiError<TPayload extends { detail?: string } = ApiErrorPayload> ex
   readonly payload: TPayload;
 
   constructor(status: number, payload: TPayload) {
-    super(payload.detail ?? "Ошибка запроса");
+    super(payload.detail ?? t("common.request_failed"));
     this.name = "ApiError";
     this.status = status;
     this.payload = payload;
@@ -101,7 +103,7 @@ export async function api<T>(path: string, init: RequestInit = {}): Promise<T> {
     headers,
   });
   if (!response.ok) {
-    const payload = await response.json().catch(() => ({ detail: "Ошибка запроса" })) as ApiErrorPayload;
+    const payload = await response.json().catch(() => ({ detail: t("common.request_failed") })) as ApiErrorPayload;
     throw new ApiError(response.status, payload);
   }
   if (response.status === 204 || response.status === 205) return undefined as T;
@@ -123,7 +125,7 @@ export function apiUpload<T>(path: string, form: FormData, onProgress?: (percent
         if (event.lengthComputable) onProgress(Math.round((event.loaded / event.total) * 100));
       };
     }
-    request.onerror = () => reject(new ApiError(0, { detail: "Ошибка сети" }));
+    request.onerror = () => reject(new ApiError(0, { detail: t("shared.network_error") }));
     request.onload = () => {
       let payload: unknown = null;
       try {
@@ -135,7 +137,7 @@ export function apiUpload<T>(path: string, form: FormData, onProgress?: (percent
         resolve(payload as T);
         return;
       }
-      reject(new ApiError(request.status, (payload ?? { detail: "Ошибка запроса" }) as ApiErrorPayload));
+      reject(new ApiError(request.status, (payload ?? { detail: t("common.request_failed") }) as ApiErrorPayload));
     };
     request.send(form);
   });
diff --git a/apps/internal-ui/src/auth/access.test.ts b/apps/internal-ui/src/auth/access.test.ts
index 7128276..e2cd1d3 100644
--- a/apps/internal-ui/src/auth/access.test.ts
+++ b/apps/internal-ui/src/auth/access.test.ts
@@ -12,8 +12,10 @@ function userWith(role: Role, capabilities: string[] = []): SessionUser {
     totpEnabled: false,
     totpLastUsedAt: null,
     deliveryMode: "CLOUD",
-  uiTheme: "SYSTEM",
-  uiAccent: "",
+    uiTheme: "SYSTEM",
+    uiAccent: "",
+    uiLanguage: "",
+    language: "ru",
     memberships: [],
     organizationPublicId: "org-1",
     organization: "org",
diff --git a/apps/internal-ui/src/features/administration/AuditFilters.tsx b/apps/internal-ui/src/features/administration/AuditFilters.tsx
index efbd1bd..2c3cdfe 100644
--- a/apps/internal-ui/src/features/administration/AuditFilters.tsx
+++ b/apps/internal-ui/src/features/administration/AuditFilters.tsx
@@ -9,6 +9,7 @@ import {
   type AuditPeriod,
   type AuditQuery,
 } from "./model";
+import { t } from "../../i18n";
 
 // Фильтры журнала: поиск · период · раздел · сотрудник · результат · «Сбросить».
 // Те же контролы, что у списков Сотрудников и Контактов — SearchInput,
@@ -27,20 +28,20 @@ export function AuditFilters({ actors, categories, query, setQuery, reset }: {
   const [actorOpen, setActorOpen] = useState(false);
 
   const periodLabel = AUDIT_PERIODS.find(([value]) => value === query.period)?.[1] ?? "";
-  const categoryLabel = categories.find((item) => item.value === query.category)?.label ?? "Все";
-  const actorLabel = actors.find((item) => item.value === query.actor)?.label ?? "Все";
+  const categoryLabel = categories.find((item) => item.value === query.category)?.label ?? t("common.all");
+  const actorLabel = actors.find((item) => item.value === query.actor)?.label ?? t("common.all");
 
   return (
     <div className="audit-filters">
       <SearchInput
         className="audit-search"
         hotkey="/"
-        placeholder="Поиск по действию, объекту или сотруднику…"
+        placeholder={t("admin.search_by_action_object_or")}
         value={query.q}
         onChange={(value) => setQuery({ q: value })}
       />
       <FilterDropdown
-        caption="Период"
+        caption={t("admin.period")}
         label={periodLabel}
         open={periodOpen}
         options={AUDIT_PERIODS.map(([value, label]) => ({ value, label }))}
@@ -49,27 +50,27 @@ export function AuditFilters({ actors, categories, query, setQuery, reset }: {
         onSelect={(value) => setQuery({ period: value as AuditPeriod })}
       />
       <FilterDropdown
-        caption="Раздел"
+        caption={t("admin.section")}
         label={categoryLabel}
         open={categoryOpen}
-        options={[{ value: "", label: "Все" }, ...categories]}
+        options={[{ value: "", label: t("common.all") }, ...categories]}
         selected={query.category ? [query.category] : []}
         onOpenChange={setCategoryOpen}
         onSelect={(value) => setQuery({ category: value })}
       />
       {actors.length > 1 && (
         <FilterDropdown
-          caption="Сотрудник"
+          caption={t("common.operator")}
           label={actorLabel}
           open={actorOpen}
-          options={[{ value: "", label: "Все" }, ...actors]}
+          options={[{ value: "", label: t("common.all") }, ...actors]}
           selected={query.actor ? [query.actor] : []}
           onOpenChange={setActorOpen}
           onSelect={(value) => setQuery({ actor: value })}
         />
       )}
       <Segmented
-        items={[["", "Все"], ["SUCCESS", "Выполнено"], ["DENIED", "Отклонено"], ["FAILED", "Ошибка"]]}
+        items={[["", t("common.all")], ["SUCCESS", t("admin.succeeded")], ["DENIED", t("admin.rejected")], ["FAILED", t("common.error")]]}
         value={query.result}
         setValue={(value) => setQuery({ result: value })}
       />
@@ -78,9 +79,7 @@ export function AuditFilters({ actors, categories, query, setQuery, reset }: {
         className={`audit-reset ${auditQueryIsDirty(query) ? "is-dirty" : ""}`}
         type="button"
         onClick={reset}
-      >
-        Сбросить
-      </button>
+      >{t("common.reset")}</button>
     </div>
   );
 }
diff --git a/apps/internal-ui/src/features/administration/AuditPage.tsx b/apps/internal-ui/src/features/administration/AuditPage.tsx
index 4dc4aac..0a0c074 100644
--- a/apps/internal-ui/src/features/administration/AuditPage.tsx
+++ b/apps/internal-ui/src/features/administration/AuditPage.tsx
@@ -1,11 +1,11 @@
 import { EmptyState, LoadingState, PageHeader } from "../../shared/ui";
 import { Pagination } from "../../shared/Pagination";
 import { Button } from "../../shared/ui-controls";
-import { pluralRu } from "../../shared/utils";
 import { AuditFilters } from "./AuditFilters";
 import { AuditTable } from "./AuditTable";
 import { auditQueryIsDirty } from "./model";
 import { useAudit } from "./useAudit";
+import { t, tn } from "../../i18n";
 
 // «Аудит действий» — отдельный экран из субменю «Настроек». Журнал отдавался
 // последними 50 событиями без фильтров и без страниц: дальше пятидесятого
@@ -18,10 +18,10 @@ export function AuditPage() {
 
   const header = (
     <PageHeader
-      title="Аудит"
+      title={t("common.audit")}
       text={payload
-        ? `Журнал действий в организации · ${pluralRu(payload.total, ["событие", "события", "событий"])}`
-        : "Журнал действий в организации"}
+        ? t("admin.audit_log_with_total", { total: tn("plural.events", payload.total) })
+        : t("admin.log_actions_organization")}
     />
   );
 
@@ -30,7 +30,7 @@ export function AuditPage() {
       <div className="audit-page">
         {header}
         <EmptyState title={error} />
-        <Button variant="secondary" onClick={() => void audit.reload()}>Повторить</Button>
+        <Button variant="secondary" onClick={() => void audit.reload()}>{t("common.try_again")}</Button>
       </div>
     );
   }
@@ -56,13 +56,13 @@ export function AuditPage() {
           таблица моргает пустотой на каждый ввод в поиске. */}
       <div className={`audit-results ${loading ? "is-loading" : ""}`}>
         {payload.items.length === 0
-          ? <EmptyState title={dirty ? "Под фильтры ничего не подошло" : "Событий пока нет"} />
+          ? <EmptyState title={dirty ? t("admin.nothing_matched_filters") : t("admin.no_events_yet")} />
           : <AuditTable events={payload.items} />}
       </div>
       {payload.pageCount > 1 && (
         <Pagination
           className="audit-pagination"
-          note={`Показано ${payload.items.length} из ${payload.total} · по ${payload.pageSize} на странице`}
+          note={t("common.shown_of_page", { shown: payload.items.length, total: payload.total, size: payload.pageSize })}
           page={payload.page}
           pageCount={payload.pageCount}
           onPage={(page) => setQuery({ page })}
diff --git a/apps/internal-ui/src/features/administration/AuditTable.tsx b/apps/internal-ui/src/features/administration/AuditTable.tsx
index 905dbc2..c9af316 100644
--- a/apps/internal-ui/src/features/administration/AuditTable.tsx
+++ b/apps/internal-ui/src/features/administration/AuditTable.tsx
@@ -3,6 +3,7 @@ import { Fragment, useState } from "react";
 import { Icon } from "../../shared/icons";
 import { shortDate, shortDateYear } from "../../shared/utils";
 import type { AuditEvent } from "./model";
+import { t } from "../../i18n";
 
 // Журнал действий. Три вещи, без которых он был нечитаем:
 // * день отбивается заголовком — иначе сотни строк идут сплошняком;
@@ -26,16 +27,16 @@ function dayLabel(value: string): string {
   const today = new Date();
   const yesterday = new Date();
   yesterday.setDate(today.getDate() - 1);
-  if (dayKey(value) === dayKey(today.toISOString())) return "Сегодня";
-  if (dayKey(value) === dayKey(yesterday.toISOString())) return "Вчера";
+  if (dayKey(value) === dayKey(today.toISOString())) return t("common.today");
+  if (dayKey(value) === dayKey(yesterday.toISOString())) return t("admin.yesterday");
   return date.getFullYear() === today.getFullYear() ? shortDate(date) : shortDateYear(date);
 }
 
 function detailLines(event: AuditEvent): Array<[string, string]> {
   const lines: Array<[string, string]> = [];
-  if (event.actorEmail) lines.push(["Сотрудник", `${event.actor} · ${event.actorEmail}`]);
-  lines.push(["Код действия", event.action]);
-  if (event.objectType) lines.push(["Объект", `${event.objectType}${event.objectId ? ` · ${event.objectId}` : ""}`]);
+  if (event.actorEmail) lines.push([t("common.operator"), `${event.actor} · ${event.actorEmail}`]);
+  lines.push([t("admin.action_code"), event.action]);
+  if (event.objectType) lines.push([t("common.object"), `${event.objectType}${event.objectId ? ` · ${event.objectId}` : ""}`]);
   if (event.sourceIp) lines.push(["IP", event.sourceIp]);
   if (event.correlationId) lines.push(["Correlation id", event.correlationId]);
   Object.entries(event.details ?? {}).forEach(([key, value]) => {
@@ -53,11 +54,11 @@ export function AuditTable({ events }: { events: AuditEvent[] }) {
       <table className="baseline-table audit-table">
         <thead>
           <tr>
-            <th className="audit-col-time">Время</th>
-            <th className="audit-col-actor">Сотрудник</th>
-            <th>Действие</th>
-            <th className="audit-col-object">Объект</th>
-            <th className="audit-col-result">Результат</th>
+            <th className="audit-col-time">{t("admin.time")}</th>
+            <th className="audit-col-actor">{t("common.operator")}</th>
+            <th>{t("common.action")}</th>
+            <th className="audit-col-object">{t("common.object")}</th>
+            <th className="audit-col-result">{t("admin.result")}</th>
             <th className="audit-col-toggle" />
           </tr>
         </thead>
diff --git a/apps/internal-ui/src/features/administration/OrganizationLogoField.tsx b/apps/internal-ui/src/features/administration/OrganizationLogoField.tsx
index b05ab2f..ad28872 100644
--- a/apps/internal-ui/src/features/administration/OrganizationLogoField.tsx
+++ b/apps/internal-ui/src/features/administration/OrganizationLogoField.tsx
@@ -2,6 +2,7 @@ import { useRef, useState } from "react";
 
 import { DecisionDialog } from "../../shared/DecisionDialog";
 import { Button } from "../../shared/ui-controls";
+import { t } from "../../i18n";
 
 export function OrganizationLogoField({
   logoUrl,
@@ -25,12 +26,12 @@ export function OrganizationLogoField({
     <div className="administration-logo-field">
       <div className="administration-logo-preview">
         {logoUrl
-          ? <img src={logoUrl} alt={`Логотип ${name}`} />
+          ? <img src={logoUrl} alt={t("admin.organization_logo_alt", { name })} />
           : <span>{name.trim().slice(0, 2).toUpperCase() || "CR"}</span>}
       </div>
       <div className="administration-logo-copy">
-        <strong>Логотип</strong>
-        <span>PNG, JPEG или WebP · до 2 МБ. Виден в сайдбаре, виджете и письмах.</span>
+        <strong>{t("admin.logo")}</strong>
+        <span>{t("admin.png_jpeg_or_webp_up")}</span>
       </div>
       {!disabled && (
         <div className="administration-logo-actions">
@@ -49,17 +50,13 @@ export function OrganizationLogoField({
             variant="secondary"
             disabled={saving}
             onClick={() => input.current?.click()}
-          >
-            Загрузить
-          </Button>
+          >{t("common.upload")}</Button>
           <button
             className="administration-logo-remove"
             type="button"
             disabled={saving || !logoUrl}
             onClick={() => setConfirmingRemoval(true)}
-          >
-            Убрать
-          </button>
+          >{t("common.remove")}</button>
         </div>
       )}
       <DecisionDialog
@@ -67,13 +64,11 @@ export function OrganizationLogoField({
         onClose={() => setConfirmingRemoval(false)}
         tone="danger"
         icon="trash"
-        title="Удалить логотип?"
-        description="Вместо него в меню снова будет показан знак Chatballs."
+        title={t("admin.remove_logo")}
+        description={t("admin.chatballs_mark_will_shown_menu")}
         actions={(
           <>
-            <Button variant="secondary" onClick={() => setConfirmingRemoval(false)}>
-              Отмена
-            </Button>
+            <Button variant="secondary" onClick={() => setConfirmingRemoval(false)}>{t("common.cancel")}</Button>
             <Button
               variant="danger-outline"
               disabled={saving}
@@ -81,9 +76,7 @@ export function OrganizationLogoField({
                 setConfirmingRemoval(false);
                 onRemove();
               }}
-            >
-              Удалить
-            </Button>
+            >{t("common.delete")}</Button>
           </>
         )}
       />
diff --git a/apps/internal-ui/src/features/administration/OrganizationSettingsForm.tsx b/apps/internal-ui/src/features/administration/OrganizationSettingsForm.tsx
index c105348..e2560ba 100644
--- a/apps/internal-ui/src/features/administration/OrganizationSettingsForm.tsx
+++ b/apps/internal-ui/src/features/administration/OrganizationSettingsForm.tsx
@@ -3,12 +3,14 @@ import type { FormEvent } from "react";
 import { FormField, SelectField } from "../../shared/form-controls";
 import { shortDateTime, timezoneLabel } from "../../shared/utils";
 import { Button } from "../../shared/ui-controls";
+import type { OrganizationLanguageOption } from "./api";
 import type { OrganizationSettings } from "./model";
 import { OrganizationLogoField } from "./OrganizationLogoField";
+import { t } from "../../i18n";
 
 function savedLabel(updatedAt: string | null): string {
-  if (!updatedAt) return "Ещё не сохранялось";
-  return `Сохранено ${shortDateTime(updatedAt)}`;
+  if (!updatedAt) return t("common.never_saved_yet");
+  return t("time.saved_at", { time: shortDateTime(updatedAt) });
 }
 
 export function OrganizationSettingsForm({
@@ -18,6 +20,7 @@ export function OrganizationSettingsForm({
   message,
   error,
   timezones,
+  languages,
   onChange,
   onSave,
   onUploadLogo,
@@ -29,6 +32,7 @@ export function OrganizationSettingsForm({
   message: string;
   error: string;
   timezones: string[];
+  languages: OrganizationLanguageOption[];
   onChange: (next: OrganizationSettings) => void;
   onSave: () => void;
   onUploadLogo: (file: File) => void;
@@ -52,7 +56,7 @@ export function OrganizationSettingsForm({
       <div className="administration-fields">
         <div className="administration-field-wide">
           <FormField
-            label="Название организации"
+            label={t("admin.organization_name")}
             value={organization.name}
             disabled={!canManage}
             onChange={canManage
@@ -61,18 +65,31 @@ export function OrganizationSettingsForm({
           />
         </div>
         <SelectField
-          label="Часовой пояс"
+          label={t("admin.time_zone")}
           value={organization.timezone}
           disabled={!canManage}
           onChange={(timezone) => onChange({ ...organization, timezone })}
           options={timezones.map((timezone) => [timezone, timezoneLabel(timezone)])}
         />
         <SelectField
-          label="Валюта"
+          label={t("settings.language")}
+          value={organization.language}
+          disabled={!canManage}
+          onChange={(language) => onChange({ ...organization, language })}
+          // Первый пункт — не язык, а отказ от выбора: организация без своего
+          // языка следует за установкой, и владелец видит это словами.
+          options={[
+            ["", t("settings.language_as_installation")],
+            ...languages.map((item): [string, string] => [item.code, item.label]),
+          ]}
+          hint={t("settings.language_org_hint")}
+        />
+        <SelectField
+          label={t("admin.currency")}
           value={organization.currency}
           disabled={!canManage}
           onChange={(currency) => onChange({ ...organization, currency })}
-          options={[["RUB", "Российский рубль (RUB)"]]}
+          options={[["RUB", t("admin.russian_rouble_rub")]]}
         />
       </div>
       {error && <div className="administration-message error" role="alert">{error}</div>}
@@ -85,7 +102,7 @@ export function OrganizationSettingsForm({
             variant="primary"
             disabled={saving || !organization.name.trim()}
           >
-            {saving ? "Сохранение" : "Сохранить"}
+            {saving ? t("common.saving") : t("common.save")}
           </Button>
         </div>
       )}
diff --git a/apps/internal-ui/src/features/administration/api.ts b/apps/internal-ui/src/features/administration/api.ts
index ab8c593..0379d6f 100644
--- a/apps/internal-ui/src/features/administration/api.ts
+++ b/apps/internal-ui/src/features/administration/api.ts
@@ -3,11 +3,18 @@ import type { AuditPayload, AuditQuery, OrganizationSettings } from "./model";
 
 const BASE = "/api/v1/company/administration/";
 
+export type OrganizationLanguageOption = { code: string; label: string };
+
 export async function loadOrganizationSettings(): Promise<{
   organization: OrganizationSettings;
   timezones: string[];
+  languages: OrganizationLanguageOption[];
 }> {
-  return api<{ organization: OrganizationSettings; timezones: string[] }>(BASE);
+  return api<{
+    organization: OrganizationSettings;
+    timezones: string[];
+    languages: OrganizationLanguageOption[];
+  }>(BASE);
 }
 
 export async function saveOrganizationSettings(
@@ -19,6 +26,7 @@ export async function saveOrganizationSettings(
       name: settings.name,
       timezone: settings.timezone,
       currency: settings.currency,
+      language: settings.language,
     }),
   });
   return payload.organization;
diff --git a/apps/internal-ui/src/features/administration/model.ts b/apps/internal-ui/src/features/administration/model.ts
index 0dea2ce..3595ca2 100644
--- a/apps/internal-ui/src/features/administration/model.ts
+++ b/apps/internal-ui/src/features/administration/model.ts
@@ -1,5 +1,6 @@
 import type { SessionUser } from "../../types";
 import { hasCapability } from "../../auth/access";
+import { t } from "../../i18n";
 
 // Аудит живёт на своём экране (AuditPage) и своём хуке; useAdministration
 // остался только под «Организацию» в Настройках.
@@ -9,6 +10,8 @@ export type OrganizationSettings = {
   name: string;
   timezone: string;
   currency: string;
+  // Пустая строка — «как в установке»: организация не обязана выбирать язык.
+  language: string;
   logoUrl: string | null;
   // Когда настройки сохраняли в последний раз — подпись у кнопки (кадр N1).
   updatedAt: string | null;
@@ -65,11 +68,11 @@ export type AuditPayload = {
 };
 
 export const AUDIT_PERIODS: Array<[AuditPeriod, string]> = [
-  ["today", "Сегодня"],
-  ["7d", "7 дней"],
-  ["30d", "30 дней"],
-  ["90d", "90 дней"],
-  ["all", "Всё время"],
+  ["today", t("common.today")],
+  ["7d", t("admin.7_days")],
+  ["30d", t("admin.30_days")],
+  ["90d", t("admin.90_days")],
+  ["all", t("admin.all_time")],
 ];
 
 export const EMPTY_AUDIT_QUERY: AuditQuery = {
diff --git a/apps/internal-ui/src/features/administration/useAdministration.ts b/apps/internal-ui/src/features/administration/useAdministration.ts
index b45b4ac..8866cd6 100644
--- a/apps/internal-ui/src/features/administration/useAdministration.ts
+++ b/apps/internal-ui/src/features/administration/useAdministration.ts
@@ -8,7 +8,9 @@ import {
   saveOrganizationSettings,
   uploadOrganizationLogo,
 } from "./api";
+import type { OrganizationLanguageOption } from "./api";
 import type { AdministrationSection, OrganizationSettings } from "./model";
+import { t } from "../../i18n";
 
 export function useAdministration({
   section,
@@ -21,6 +23,7 @@ export function useAdministration({
 }) {
   const [organization, setOrganization] = useState<OrganizationSettings | null>(null);
   const [timezones, setTimezones] = useState<string[]>([]);
+  const [languages, setLanguages] = useState<OrganizationLanguageOption[]>([]);
   const [loading, setLoading] = useState(true);
   const [saving, setSaving] = useState(false);
   const [message, setMessage] = useState("");
@@ -40,8 +43,9 @@ export function useAdministration({
       const settings = await loadOrganizationSettings();
       setOrganization(settings.organization);
       setTimezones(settings.timezones);
+      setLanguages(settings.languages);
     } catch (loadError) {
-      setError(loadError instanceof ApiError ? loadError.message : "Не удалось загрузить данные");
+      setError(loadError instanceof ApiError ? loadError.message : t("admin.could_not_load_data"));
     } finally {
       setLoading(false);
     }
@@ -64,7 +68,7 @@ export function useAdministration({
       setMessage(successMessage);
       await refreshIdentity();
     } catch (changeError) {
-      setError(changeError instanceof ApiError ? changeError.message : "Не удалось сохранить изменения");
+      setError(changeError instanceof ApiError ? changeError.message : t("admin.could_not_save_changes"));
     } finally {
       setSaving(false);
     }
@@ -77,19 +81,20 @@ export function useAdministration({
     organization,
     saving,
     timezones,
+    languages,
     setOrganization,
     reload: load,
     save: () => organization && runChange(
       () => saveOrganizationSettings(organization),
-      "Данные организации сохранены",
+      t("admin.organization_details_saved"),
     ),
     uploadLogo: (file: File) => runChange(
       () => uploadOrganizationLogo(file),
-      "Логотип обновлён",
+      t("admin.logo_updated"),
     ),
     removeLogo: () => runChange(
       removeOrganizationLogo,
-      "Логотип удалён",
+      t("admin.logo_removed"),
     ),
   };
 }
diff --git a/apps/internal-ui/src/features/administration/useAudit.ts b/apps/internal-ui/src/features/administration/useAudit.ts
index ca9eca0..2232761 100644
--- a/apps/internal-ui/src/features/administration/useAudit.ts
+++ b/apps/internal-ui/src/features/administration/useAudit.ts
@@ -4,6 +4,7 @@ import { useDebounced } from "../../shared/useDebounced";
 import { usePagedResource } from "../../shared/usePagedResource";
 import { loadAudit } from "./api";
 import { EMPTY_AUDIT_QUERY, type AuditPayload, type AuditQuery } from "./model";
+import { t } from "../../i18n";
 
 // Журнал аудита: фильтры и страница живут на сервере — журнал растёт без
 // предела, и отдать его целиком нельзя. Страницей, отложенным поиском и
@@ -27,7 +28,7 @@ export function useAudit() {
     (page: number) => loadAudit({ ...filters, page }),
     [filters],
   );
-  const journal = usePagedResource<AuditPayload>(load, filters, "Не удалось загрузить журнал");
+  const journal = usePagedResource<AuditPayload>(load, filters, t("admin.could_not_load_log"));
 
   const setQuery = useCallback((patch: Partial<AuditQuery>) => {
     // Страницу двигает подвал списка, фильтры — состояние запроса; смена
diff --git a/apps/internal-ui/src/features/agents/AgentDetailPage.tsx b/apps/internal-ui/src/features/agents/AgentDetailPage.tsx
index 4875219..9b5e34b 100644
--- a/apps/internal-ui/src/features/agents/AgentDetailPage.tsx
+++ b/apps/internal-ui/src/features/agents/AgentDetailPage.tsx
@@ -33,6 +33,7 @@ import {
   type AgentConnection,
   type AgentPatch,
 } from "./model";
+import { t } from "../../i18n";
 
 // Карточка агента (дизайн-базлайн v2, «Агенты Baseline», кадры G3–G5): слева —
 // что агент знает и как говорит (инструкции, знания), справа — как он работает
@@ -118,7 +119,7 @@ export function AgentDetailPage({
     if (canManageConnections) void loadMessengers();
   }, [canManageConnections, loadMessengers]);
 
-  if (missing) return <EmptyState title="Агент не найден" />;
+  if (missing) return <EmptyState title={t("ai.agent_not_found")} />;
   if (failed) return <ErrorScreen retry={() => void reload()} />;
   if (!card) return <LoadingState />;
 
@@ -132,7 +133,7 @@ export function AgentDetailPage({
     } catch (caught) {
       setFeedback({
         kind: "error",
-        text: caught instanceof ApiError ? caught.payload.detail ?? "Не удалось сохранить" : "Не удалось сохранить",
+        text: caught instanceof ApiError ? caught.payload.detail ?? t("common.could_not_save") : t("common.could_not_save"),
       });
       return false;
     } finally {
@@ -151,7 +152,7 @@ export function AgentDetailPage({
         kind: "error",
         text: caught instanceof ApiError && caught.payload.detail
           ? caught.payload.detail
-          : "Не удалось изменить статус AI",
+          : t("ai.could_not_change_ai_status"),
       });
     } finally {
       setBusy(false);
@@ -169,8 +170,8 @@ export function AgentDetailPage({
         kind: "warning",
         text:
           caught instanceof ApiError && caught.status === 409
-            ? "Агента нельзя удалить: есть диалоги или подключения. Отвяжите подключения и закройте диалоги."
-            : "Не удалось удалить агента",
+            ? t("ai.agent_cannot_deleted_has_conversations")
+            : t("ai.could_not_delete_agent"),
       });
     } finally {
       setBusy(false);
@@ -184,7 +185,7 @@ export function AgentDetailPage({
       setCard(saved.agent);
       void loadMessengers();
     } catch {
-      setFeedback({ kind: "error", text: "Не удалось отвязать подключение" });
+      setFeedback({ kind: "error", text: t("ai.could_not_detach_connection") });
     } finally {
       setBusy(false);
     }
@@ -202,8 +203,8 @@ export function AgentDetailPage({
         kind: "error",
         text:
           caught instanceof ApiError && caught.status === 409
-            ? "Подключение уже привязано к другому агенту"
-            : "Не удалось привязать подключение",
+            ? t("ai.connection_already_bound_another_agent")
+            : t("ai.could_not_bind_connection"),
       });
     } finally {
       setBusy(false);
@@ -216,14 +217,14 @@ export function AgentDetailPage({
   // Выключение агента и удаление живут в этом меню, а не отдельными кнопками
   // под карточкой: на странице остаётся один переключатель AI.
   const menuItems = [
-    { key: "copy-code", label: <button type="button" onClick={() => { setMenuOpen(false); void navigator.clipboard?.writeText(card.code); }}><Icon name="copy" size={15} />Скопировать код</button> },
+    { key: "copy-code", label: <button type="button" onClick={() => { setMenuOpen(false); void navigator.clipboard?.writeText(card.code); }}><Icon name="copy" size={15} />{t("ai.copy_snippet")}</button> },
     { type: "divider" as const },
     {
       key: "active",
       disabled: busy,
       label: (
         <button type="button" onClick={() => { setMenuOpen(false); void apply({ isActive: !card.isActive }); }}>
-          <Icon name={card.isActive ? "xCircle" : "check"} size={15} />{card.isActive ? "Выключить агента" : "Включить агента"}
+          <Icon name={card.isActive ? "xCircle" : "check"} size={15} />{card.isActive ? t("ai.turn_agent_off") : t("ai.turn_agent")}
         </button>
       ),
     },
@@ -232,15 +233,14 @@ export function AgentDetailPage({
       disabled: busy,
       label: (
         <button className="danger" type="button" onClick={() => { setMenuOpen(false); setDeleting(true); }}>
-          <Icon name="trash" size={15} />Удалить агента
-        </button>
+          <Icon name="trash" size={15} />{t("ai.delete_agent")}</button>
       ),
     },
   ];
 
   return (
     <div className="agent-page">
-      <BackLink label="Агенты" onClick={openAgents} />
+      <BackLink label={t("common.agents")} onClick={openAgents} />
 
       <header className="agent-head">
         <span className="agent-head-tile" style={{ background: tile.background, color: tile.color }}>
@@ -252,22 +252,22 @@ export function AgentDetailPage({
             <b className="agents-status" style={{ background: status.bg, color: status.color }}><i />{status.text}</b>
           </div>
           <p>
-            <span><i style={{ background: card.groupId === null ? "var(--n-5)" : groupColorOf(card.groupId, card.groupColor) }} />{card.groupName ?? "Без группы"}</span>
+            <span><i style={{ background: card.groupId === null ? "var(--n-5)" : groupColorOf(card.groupId, card.groupColor) }} />{card.groupName ?? t("common.no_group")}</span>
             <i />
             <code>{card.code}</code>
             <i />
             {openDialogsLine(card.counters.openConversations)}
             <i />
-            создан {createdLabel(card.createdAt)}
+            {t("ai.created_on", { date: createdLabel(card.createdAt) })}
           </p>
         </div>
         {canManage && (
           <div className="agent-head-actions">
             <Button variant="secondary" className="agent-toggle" icon={running ? "pause" : "bolt"} disabled={busy} onClick={() => void toggleAi()}>
-              {running ? "Остановить AI" : "Запустить AI"}
+              {running ? t("ai.stop_ai") : t("ai.start_ai")}
             </Button>
             <Dropdown menu={{ items: menuItems }} open={menuOpen} onOpenChange={setMenuOpen} trigger={["click"]} overlayClassName="app-dropdown">
-              <button className="agent-head-menu" type="button" aria-label="Действия агента" title="Действия"><Icon name="more" size={17} strokeWidth={2} /></button>
+              <button className="agent-head-menu" type="button" aria-label={t("ai.agent_actions")} title={t("common.actions")}><Icon name="more" size={17} strokeWidth={2} /></button>
             </Dropdown>
           </div>
         )}
@@ -277,11 +277,11 @@ export function AgentDetailPage({
         <div className="agent-blocker">
           <Icon name="alert" size={18} strokeWidth={2.2} />
           <div>
-            <strong>AI не может отвечать: провайдер не выбран</strong>
-            <small>Добавьте ключ в «Настройки → AI-провайдер» и выберите провайдера в блоке «Модель». До этого диалоги агента ждут человека.</small>
+            <strong>{t("ai.ai_cannot_reply_no_provider")}</strong>
+            <small>{t("ai.add_key_under_settings_ai")}</small>
           </div>
           {canManage && (
-            <button type="button" onClick={openAiProvider}>Открыть настройки<Icon name="external" size={13} strokeWidth={2.2} /></button>
+            <button type="button" onClick={openAiProvider}>{t("ai.open_settings")}<Icon name="external" size={13} strokeWidth={2.2} /></button>
           )}
         </div>
       )}
@@ -311,14 +311,14 @@ export function AgentDetailPage({
       {deleting && (
         <Modal
           open
-          title="Удалить агента?"
-          okText="Удалить"
-          cancelText="Отмена"
+          title={t("ai.delete_agent_2")}
+          okText={t("common.delete")}
+          cancelText={t("common.cancel")}
           okButtonProps={{ danger: true, disabled: busy }}
           onOk={() => void removeAgent()}
           onCancel={() => setDeleting(false)}
         >
-          <p>Агент «{card.name}» будет удалён безвозвратно. Диалоги и подключения не дают удалить агента.</p>
+          <p>{t("ai.agent_will_be_deleted", { name: card.name })}</p>
         </Modal>
       )}
     </div>
@@ -328,9 +328,9 @@ export function AgentDetailPage({
 // --- Инструкции (кадры G3/G5) ---
 
 const INSTRUCTION_FIELDS = [
-  { key: "persona", label: "Кто он и что делает", hint: "персонализация", rows: 7, placeholder: "" },
-  { key: "tone", label: "Как он должен говорить", hint: "тон", rows: 7, placeholder: "Например: спокойно и вежливо, на «вы»" },
-  { key: "instructions", label: "Правила работы", hint: "инструкции", rows: 10, placeholder: "Например: не называй цены, направляй к консультанту" },
+  { key: "persona", label: t("ai.who_what_does"), hint: t("ai.persona"), rows: 7, placeholder: "" },
+  { key: "tone", label: t("ai.how_should_speak"), hint: t("ai.tone"), rows: 7, placeholder: t("ai.example_calmly_politely_formal_address") },
+  { key: "instructions", label: t("ai.working_rules"), hint: t("ai.instructions"), rows: 10, placeholder: t("ai.example_do_not_quote_prices") },
 ] as const;
 
 function InstructionsCard({ card, canManage, busy, apply }: {
@@ -348,8 +348,8 @@ function InstructionsCard({ card, canManage, busy, apply }: {
   return (
     <section className="agent-card">
       <div className="agent-card-head">
-        <h3>Инструкции</h3>
-        <small>Системный промпт собирается из трёх частей в этом порядке</small>
+        <h3>{t("ai.instructions_2")}</h3>
+        <small>{t("ai.system_prompt_assembled_from_three")}</small>
       </div>
       <div className="agent-instructions">
         {INSTRUCTION_FIELDS.map((field) => (
@@ -369,9 +369,9 @@ function InstructionsCard({ card, canManage, busy, apply }: {
       </div>
       {canManage && dirty && (
         <div className="agent-dirty">
-          <small>Есть несохранённые изменения — применятся в runtime сразу</small>
-          <button type="button" disabled={busy} onClick={() => setDraft({ persona: card.persona, tone: card.tone, instructions: card.instructions })}>Отменить</button>
-          <button className="is-primary" type="button" disabled={busy} onClick={() => void apply(draft)}>Сохранить</button>
+          <small>{t("ai.there_unsaved_changes_they_take")}</small>
+          <button type="button" disabled={busy} onClick={() => setDraft({ persona: card.persona, tone: card.tone, instructions: card.instructions })}>{t("ai.undo")}</button>
+          <button className="is-primary" type="button" disabled={busy} onClick={() => void apply(draft)}>{t("common.save")}</button>
         </div>
       )}
     </section>
@@ -398,15 +398,14 @@ function KnowledgeCard({ card, canManage, openKnowledge, reload }: {
   return (
     <section className="agent-card">
       <div className="agent-card-head is-row">
-        <div><h3>Знания</h3><small>{knowledgeLine(card)}</small></div>
+        <div><h3>{t("ai.knowledge")}</h3><small>{knowledgeLine(card)}</small></div>
         {canManage && (
           <button className="agent-inline-button" type="button" onClick={() => setPicking(true)}>
-            <Icon name="plus" size={13} strokeWidth={2.2} />Выбрать
-          </button>
+            <Icon name="plus" size={13} strokeWidth={2.2} />{t("ai.select")}</button>
         )}
       </div>
       {rows.length === 0 ? (
-        <p className="agent-knowledge-empty">Знания не прикреплены — агент отвечает только по инструкциям. Выберите статьи из библиотеки или портала поддержки.</p>
+        <p className="agent-knowledge-empty">{t("ai.no_knowledge_attached_so_agent")}</p>
       ) : (
         <div className="agent-knowledge-list">
           {rows.map((row) => (
@@ -418,7 +417,7 @@ function KnowledgeCard({ card, canManage, openKnowledge, reload }: {
               {row.chip && <small className={`agent-chip is-${row.chipTone}`}>{row.chip}</small>}
               <small className="agent-knowledge-meta">{row.meta}</small>
               {canManage && (
-                <button className="agent-knowledge-remove" type="button" aria-label="Убрать" title="Убрать" onClick={() => void detach(row.kind, row.id)}>
+                <button className="agent-knowledge-remove" type="button" aria-label={t("common.remove")} title={t("common.remove")} onClick={() => void detach(row.kind, row.id)}>
                   <Icon name="close" size={12} strokeWidth={2.4} />
                 </button>
               )}
@@ -460,17 +459,17 @@ function AssignmentCard({ card, groups, canManage, busy, apply }: {
 
   return (
     <section className="agent-card is-side">
-      <h3>Назначение</h3>
-      <p>Группа определяет, кто из сотрудников видит диалоги агента; без группы — видны всем.</p>
+      <h3>{t("ai.assignment")}</h3>
+      <p>{t("ai.group_decides_which_operators_see")}</p>
       <div className="agent-side-fields">
         <label className="agent-field">
-          <span>Название</span>
+          <span>{t("common.title")}</span>
           {canManage
             ? <input value={name} onChange={(event) => setName(event.target.value)} onBlur={() => { if (dirty) void apply({ name: name.trim() }); }} />
             : <span className="agent-field-static">{card.name}</span>}
         </label>
         <label className="agent-field is-select">
-          <span>Группа</span>
+          <span>{t("common.group")}</span>
           <span className="agent-field-control">
             <i className="agent-group-dot" style={{ background: card.groupId === null ? "var(--n-5)" : groupColorOf(card.groupId, card.groupColor) }} />
             {canManage ? (
@@ -479,11 +478,11 @@ function AssignmentCard({ card, groups, canManage, busy, apply }: {
                 value={card.groupId === null ? "" : String(card.groupId)}
                 onChange={(event) => void apply({ groupId: event.target.value ? Number(event.target.value) : null })}
               >
-                <option value="">Без группы</option>
+                <option value="">{t("common.no_group")}</option>
                 {groups.map((group) => <option value={String(group.id)} key={group.id}>{group.name}</option>)}
               </select>
             ) : (
-              <span className="agent-field-static">{card.groupName ?? "Без группы"}</span>
+              <span className="agent-field-static">{card.groupName ?? t("common.no_group")}</span>
             )}
             <Icon name="chevron" size={14} strokeWidth={2.2} />
           </span>
@@ -515,11 +514,11 @@ function ModelCard({ card, providers, canManage, busy, apply }: {
 
   return (
     <section className="agent-card is-side">
-      <h3>Модель</h3>
-      <p>Ключ провайдера — в «Настройки → AI-провайдер». Модель выбирается из каталога провайдера.</p>
+      <h3>{t("common.model")}</h3>
+      <p>{t("ai.provider_key_lives_under_settings")}</p>
       <div className="agent-side-fields">
         <label className={`agent-field is-select ${missingProvider ? "is-invalid" : ""}`}>
-          <span>Провайдер</span>
+          <span>{t("ai.provider")}</span>
           <span className="agent-field-control">
             {canManage ? (
               <select
@@ -527,24 +526,24 @@ function ModelCard({ card, providers, canManage, busy, apply }: {
                 value={card.providerIntegrationId ? String(card.providerIntegrationId) : ""}
                 onChange={(event) => void apply({ providerIntegrationId: event.target.value ? Number(event.target.value) : null })}
               >
-                <option value="">Не выбран</option>
+                <option value="">{t("ai.not_selected")}</option>
                 {providers.map((item) => <option value={String(item.id)} key={item.id}>{item.name}</option>)}
               </select>
             ) : (
-              <span className="agent-field-static">{providerName || "Не выбран"}</span>
+              <span className="agent-field-static">{providerName || t("ai.not_selected")}</span>
             )}
             <Icon name="chevron" size={14} strokeWidth={2.2} />
           </span>
         </label>
         <label className="agent-field is-model">
-          <span>Модель</span>
+          <span>{t("common.model")}</span>
           <span className="agent-field-control">
-            <span className={`agent-field-static ${missingProvider ? "is-placeholder" : ""}`}>{missingProvider ? "выберите провайдера" : card.model}</span>
+            <span className={`agent-field-static ${missingProvider ? "is-placeholder" : ""}`}>{missingProvider ? t("ai.pick_provider") : card.model}</span>
             <Icon name="search" size={14} strokeWidth={1.8} />
           </span>
         </label>
         <div className="agent-limit">
-          <span>Лимит в день</span>
+          <span>{t("ai.daily_limit")}</span>
           <span>
             {canManage
               ? <input value={limit} inputMode="decimal" placeholder="0.00" onChange={(event) => setLimit(event.target.value)} onBlur={saveLimit} />
@@ -572,17 +571,17 @@ function ConnectionsCard({ card, canManage, busy, available, openIntegrations, b
   return (
     <section className="agent-card is-side">
       <div className="agent-card-head is-tight">
-        <h3>Подключения</h3>
+        <h3>{t("common.connections")}</h3>
         {canManage && (
-          <button className="link has-icon" type="button" onClick={openIntegrations}>Интеграции<Icon name="external" size={13} strokeWidth={2.2} /></button>
+          <button className="link has-icon" type="button" onClick={openIntegrations}>{t("common.integrations")}<Icon name="external" size={13} strokeWidth={2.2} /></button>
         )}
       </div>
-      <p>Через них клиенты попадают к агенту. Одно подключение — один агент.</p>
+      <p>{t("ai.customers_reach_agent_through_these")}</p>
       {card.connections.map((connection) => (
         <ConnectionRow
           connection={connection}
           status={connectionStatusMeta(connection.status)}
-          action={canManage ? { label: "Отвязать", run: () => unbind(connection.id) } : null}
+          action={canManage ? { label: t("ai.unbind"), run: () => unbind(connection.id) } : null}
           busy={busy}
           key={connection.id}
         />
@@ -590,9 +589,9 @@ function ConnectionsCard({ card, canManage, busy, available, openIntegrations, b
       {canManage && available.map((integration) => (
         <ConnectionRow
           connection={{ id: integration.id, provider: integration.provider, name: integration.name, status: integration.status, botUsername: "", email: "", allowedOrigins: [], widgetPublicKey: "" }}
-          subtitle="Свободное подключение"
-          status={{ text: "Свободно", bg: "var(--n-9)", color: "var(--n-4)" }}
-          action={{ label: "Привязать", run: () => bind(integration.id) }}
+          subtitle={t("ai.free_connection")}
+          status={{ text: t("ai.free"), bg: "var(--n-9)", color: "var(--n-4)" }}
+          action={{ label: t("ai.bind"), run: () => bind(integration.id) }}
           busy={busy}
           key={`free-${integration.id}`}
         />
@@ -600,11 +599,11 @@ function ConnectionsCard({ card, canManage, busy, available, openIntegrations, b
       {widget && (
         <div className="agent-widget">
           <div>
-            <small>Код вставки виджета</small>
-            <CopyButton className="agent-widget-copy" label="Копировать" value={webWidgetSnippet(widget.widgetPublicKey)} />
+            <small>{t("ai.widget_embed_snippet")}</small>
+            <CopyButton className="agent-widget-copy" label={t("common.copy")} value={webWidgetSnippet(widget.widgetPublicKey)} />
           </div>
           <code>{webWidgetSnippet(widget.widgetPublicKey)}</code>
-          <small>Вставьте перед &lt;/body&gt; на сайте</small>
+          <small>{t("ai.paste_before_lt_body_gt")}</small>
         </div>
       )}
     </section>
diff --git a/apps/internal-ui/src/features/agents/AgentKnowledgeDialog.tsx b/apps/internal-ui/src/features/agents/AgentKnowledgeDialog.tsx
index 58055e8..baceb7c 100644
--- a/apps/internal-ui/src/features/agents/AgentKnowledgeDialog.tsx
+++ b/apps/internal-ui/src/features/agents/AgentKnowledgeDialog.tsx
@@ -8,6 +8,7 @@ import { shortDate } from "../../shared/utils";
 import { fetchKnowledgeList } from "../ai/knowledge/api";
 import { listPortalArticles, listSupportPortals } from "../support-portals/api";
 import type { AgentCard } from "./model";
+import { t } from "../../i18n";
 
 // «Выбрать» в блоке «Знания» карточки агента (кадры G3/G5): один список из
 // материалов библиотеки и опубликованных статей порталов. Агент отвечает
@@ -56,7 +57,7 @@ export function AgentKnowledgeDialog({ card, onClose, onSave }: {
             id: article.id,
             title: article.publishedRevision?.title ?? article.slug,
             icon: "globe" as const,
-            meta: `Портал · ${portal.name}`,
+            meta: t("ai.portal_named", { name: portal.name }),
             disabled: false,
           })));
         setChoices([
@@ -66,7 +67,7 @@ export function AgentKnowledgeDialog({ card, onClose, onSave }: {
             id: item.id,
             title: item.title,
             icon: "doc",
-            meta: item.isEnabled ? `обновлено ${shortDate(item.updatedAt)}` : "Выключено",
+            meta: item.isEnabled ? t("ai.updated_on", { date: shortDate(item.updatedAt) }) : t("common.off"),
             disabled: false,
           })),
           ...articles,
@@ -105,20 +106,20 @@ export function AgentKnowledgeDialog({ card, onClose, onSave }: {
       });
       onClose();
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось сохранить выбор");
+      setError(caught instanceof Error ? caught.message : t("ai.could_not_save_selection"));
       setSaving(false);
     }
   }
 
   return (
-    <Modal className="agent-knowledge-modal" open width={560} title="Выбрать знания" onCancel={onClose} footer={null} destroyOnClose>
-      <p className="agent-create-lead">Агент отвечает только по выбранным материалам: знаниям библиотеки и опубликованным статьям порталов.</p>
-      <SearchInput className="agent-knowledge-search" placeholder="Поиск по названию" value={search} onChange={setSearch} />
+    <Modal className="agent-knowledge-modal" open width={560} title={t("ai.select_knowledge")} onCancel={onClose} footer={null} destroyOnClose>
+      <p className="agent-create-lead">{t("ai.agent_answers_only_from_selected")}</p>
+      <SearchInput className="agent-knowledge-search" placeholder={t("ai.search_by_title")} value={search} onChange={setSearch} />
       {choices === null && !failed && <LoadingState />}
-      {failed && <div className="agent-form-error">Не удалось загрузить список материалов</div>}
+      {failed && <div className="agent-form-error">{t("ai.could_not_load_material_list")}</div>}
       {choices !== null && (
         <div className="agent-knowledge-choices">
-          {visible.length === 0 && <p className="agent-knowledge-nothing">Ничего не найдено</p>}
+          {visible.length === 0 && <p className="agent-knowledge-nothing">{t("common.nothing_found")}</p>}
           {visible.map((choice) => (
             <label className={`agent-knowledge-choice ${picked.has(choice.key) ? "is-picked" : ""}`} key={choice.key}>
               <input type="checkbox" checked={picked.has(choice.key)} onChange={() => toggle(choice.key)} />
@@ -131,9 +132,9 @@ export function AgentKnowledgeDialog({ card, onClose, onSave }: {
       )}
       {error && <div className="agent-form-error">{error}</div>}
       <div className="agent-create-actions">
-        <Button variant="secondary" onClick={onClose}>Отмена</Button>
+        <Button variant="secondary" onClick={onClose}>{t("common.cancel")}</Button>
         <Button variant="primary" disabled={choices === null || saving} onClick={() => void submit()}>
-          {saving ? "Сохранение…" : "Сохранить"}
+          {saving ? t("ai.saving") : t("common.save")}
         </Button>
       </div>
     </Modal>
diff --git a/apps/internal-ui/src/features/agents/AgentsPage.tsx b/apps/internal-ui/src/features/agents/AgentsPage.tsx
index 10725d7..debaadc 100644
--- a/apps/internal-ui/src/features/agents/AgentsPage.tsx
+++ b/apps/internal-ui/src/features/agents/AgentsPage.tsx
@@ -19,6 +19,7 @@ import {
   setAgentAiActive,
   type AgentCard,
 } from "./model";
+import { t } from "../../i18n";
 
 // Список агентов (дизайн-базлайн v2, «Агенты Baseline», кадры G1, G2, S1):
 // агент · группа · статус · модель · подключения · открытые · ⋯.
@@ -38,28 +39,28 @@ function CreateAgentModal({ groups, onClose, onCreated }: { groups: EmployeeGrou
       const created = await createAgent({ name: name.trim(), groupId });
       onCreated(created.agent.id);
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось создать агента");
+      setError(caught instanceof Error ? caught.message : t("ai.could_not_create_agent"));
       setSubmitting(false);
     }
   }
 
   return (
-    <Modal className="agent-create-modal" open width={440} title="Создать агента" onCancel={onClose} footer={null} destroyOnClose>
-      <p className="agent-create-lead">Один шаг. Инструкции, модель, знания и подключения — потом, на карточке агента.</p>
+    <Modal className="agent-create-modal" open width={440} title={t("profile.create_agent")} onCancel={onClose} footer={null} destroyOnClose>
+      <p className="agent-create-lead">{t("ai.one_step_instructions_model_knowledge")}</p>
       <div className="agent-create-fields">
-        <FormField label="Название" value={name} onChange={setName} placeholder="Например: Приёмная" />
+        <FormField label={t("common.title")} value={name} onChange={setName} placeholder={t("ai.example_front_desk")} />
         <SelectField
-          label="Группа"
+          label={t("common.group")}
           value={groupId === null ? "" : String(groupId)}
           onChange={(value) => setGroupId(value ? Number(value) : null)}
-          options={[["", "Без группы — диалоги видны всем"], ...groups.map((item) => [String(item.id), item.name] as [string, string])]}
+          options={[["", t("ai.without_group_conversations_visible_everyone")], ...groups.map((item) => [String(item.id), item.name] as [string, string])]}
         />
         {error && <div className="agent-form-error">{error}</div>}
       </div>
       <div className="agent-create-actions">
-        <Button variant="secondary" onClick={onClose}>Отмена</Button>
+        <Button variant="secondary" onClick={onClose}>{t("common.cancel")}</Button>
         <Button variant="primary" disabled={!name.trim() || submitting} onClick={() => void submit()}>
-          {submitting ? "Создание…" : "Создать"}
+          {submitting ? t("ai.creating") : t("ai.create_2")}
         </Button>
       </div>
     </Modal>
@@ -73,14 +74,14 @@ function AgentRow({ card, openAgent, onToggleAi }: { card: AgentCard; openAgent:
   const status = agentStatusMeta(card);
   const open = card.counters.openConversations;
   const menuItems = [
-    { key: "open", label: <button type="button" onClick={() => { setMenuOpen(false); openAgent(card.id); }}><Icon name="external" size={15} />Открыть карточку</button> },
+    { key: "open", label: <button type="button" onClick={() => { setMenuOpen(false); openAgent(card.id); }}><Icon name="external" size={15} />{t("admin.open_card")}</button> },
     { type: "divider" as const },
     {
       key: "toggle",
       label: (
         <button type="button" className={card.aiStatus === "ACTIVE" ? "warning" : ""} onClick={() => { setMenuOpen(false); onToggleAi(card); }}>
           <Icon name={card.aiStatus === "ACTIVE" ? "pause" : "bolt"} size={15} />
-          {card.aiStatus === "ACTIVE" ? "Остановить AI" : "Запустить AI"}
+          {card.aiStatus === "ACTIVE" ? t("ai.stop_ai") : t("ai.start_ai")}
         </button>
       ),
     },
@@ -99,7 +100,7 @@ function AgentRow({ card, openAgent, onToggleAi }: { card: AgentCard; openAgent:
       </div>
       <span className={`agents-row-group ${card.groupId === null ? "is-none" : ""}`}>
         {card.groupId !== null && <i style={{ background: groupColorOf(card.groupId, card.groupColor) }} />}
-        {card.groupName ?? "Без группы"}
+        {card.groupName ?? t("common.no_group")}
       </span>
       <b className="agents-status" style={{ background: status.bg, color: status.color }}><i />{status.text}</b>
       <span className="agents-row-model">{agentModelLabel(card)}</span>
@@ -118,7 +119,7 @@ function AgentRow({ card, openAgent, onToggleAi }: { card: AgentCard; openAgent:
       </div>
       <div className="agents-row-open" style={{ color: open ? "var(--warning-text)" : "var(--n-5)" }}>{open || "—"}</div>
       <Dropdown menu={{ items: menuItems }} open={menuOpen} onOpenChange={setMenuOpen} trigger={["click"]} overlayClassName="app-dropdown">
-        <button className="agents-row-menu" type="button" aria-label="Действия агента" title="Действия" onClick={(event) => event.stopPropagation()}><Icon name="more" size={16} strokeWidth={2} /></button>
+        <button className="agents-row-menu" type="button" aria-label={t("ai.agent_actions")} title={t("common.actions")} onClick={(event) => event.stopPropagation()}><Icon name="more" size={16} strokeWidth={2} /></button>
       </Dropdown>
     </div>
   );
@@ -138,7 +139,7 @@ export function AgentsPage({
     (page: number) => fetchAgentsPage({ group: "all", query: "" }, page),
     [],
   );
-  const agents = usePagedResource(load, null, "Не удалось загрузить агентов");
+  const agents = usePagedResource(load, null, t("ai.could_not_load_agents"));
 
   async function toggleAi(card: AgentCard) {
     await setAgentAiActive(card.id, card.aiStatus !== "ACTIVE").catch(() => undefined);
@@ -149,30 +150,30 @@ export function AgentsPage({
     <div className="agents-page">
       <header className="agents-header">
         <div>
-          <h2>Агенты</h2>
-          <p>Агент отвечает клиентам первым и собирает диалоги в группу</p>
+          <h2>{t("common.agents")}</h2>
+          <p>{t("ai.agent_answers_customers_first_collects")}</p>
         </div>
-        <Button variant="primary" className="agents-create" icon="plus" iconSize={15} onClick={() => setCreating(true)}>Создать агента</Button>
+        <Button variant="primary" className="agents-create" icon="plus" iconSize={15} onClick={() => setCreating(true)}>{t("profile.create_agent")}</Button>
       </header>
       {agents.errorText && <div className="agents-error">{agents.errorText}</div>}
       {agents.total === 0 ? (
         <div className="agents-empty">
           <span><Icon name="robot" size={24} strokeWidth={1.8} /></span>
           <div>
-            <strong>Агент отвечает клиентам первым. Создайте первого</strong>
-            <p>Имя и группа — всё, что нужно для старта. Инструкции, знания и подключения настраиваются потом на карточке.</p>
+            <strong>{t("ai.agent_answers_customers_first_create")}</strong>
+            <p>{t("ai.name_group_all_takes_start")}</p>
           </div>
-          <Button variant="primary" className="agents-create is-wide" onClick={() => setCreating(true)}>Создать агента</Button>
+          <Button variant="primary" className="agents-create is-wide" onClick={() => setCreating(true)}>{t("profile.create_agent")}</Button>
         </div>
       ) : (
         <div className="agents-table">
           <div className="agents-thead">
-            <span>Агент</span>
-            <span>Группа</span>
-            <span>Статус</span>
-            <span>Модель</span>
-            <span>Подключения</span>
-            <span className="is-right">Открытые</span>
+            <span>{t("common.agent")}</span>
+            <span>{t("common.group")}</span>
+            <span>{t("common.status")}</span>
+            <span>{t("common.model")}</span>
+            <span>{t("common.connections")}</span>
+            <span className="is-right">{t("ai.open")}</span>
             <span />
           </div>
           {agents.items.map((card) => (
diff --git a/apps/internal-ui/src/features/agents/model.ts b/apps/internal-ui/src/features/agents/model.ts
index 27e0702..eee8c37 100644
--- a/apps/internal-ui/src/features/agents/model.ts
+++ b/apps/internal-ui/src/features/agents/model.ts
@@ -5,8 +5,9 @@ import { api } from "../../api/client";
 import type { PagedPayload } from "../../shared/usePagedResource";
 import { agentColorOf } from "../conversations/model";
 import { channelMap, providerKey } from "../../shared/providers";
-import { pluralRu, shortDate } from "../../shared/utils";
+import { shortDate } from "../../shared/utils";
 import type { AgentKnowledgeRef, AgentPortalArticleRef } from "../ai/model";
+import { t, tn } from "../../i18n";
 
 export type AgentConnection = {
   id: number;
@@ -131,9 +132,9 @@ export type AgentStatusTone = "active" | "paused" | "disabled";
 // таблица ST макета: «AI отвечает» на --ai, «Без AI» на предупреждении,
 // «Выключен» серым.
 const STATUS_META: Record<AgentStatusTone, { text: string; bg: string; color: string }> = {
-  active: { text: "AI отвечает", bg: "color-mix(in srgb, var(--ai) 14%, var(--surface-card))", color: "var(--ai)" },
-  paused: { text: "Без AI", bg: "var(--warning-bg)", color: "var(--warning-text)" },
-  disabled: { text: "Выключен", bg: "var(--n-9)", color: "var(--n-4)" },
+  active: { text: t("conversations.ai_replying"), bg: "color-mix(in srgb, var(--ai) 14%, var(--surface-card))", color: "var(--ai)" },
+  paused: { text: t("ai.no_ai_2"), bg: "var(--warning-bg)", color: "var(--warning-text)" },
+  disabled: { text: t("ai.off"), bg: "var(--n-9)", color: "var(--n-4)" },
 };
 
 export function agentStatusTone(card: AgentCard): AgentStatusTone {
@@ -168,31 +169,31 @@ export function agentTint(provider: string): { color: string; bg: string; full:
 export function connectionSubtitle(connection: AgentConnection): string {
   const key = providerKey(connection.provider);
   if (key === "TG") return connection.botUsername ? `Telegram · @${connection.botUsername}` : "Telegram";
-  if (key === "WEB") return connection.allowedOrigins[0] ?? "Web-виджет";
+  if (key === "WEB") return connection.allowedOrigins[0] ?? t("common.web_widget");
   if (key === "EMAIL") return connection.email || "Email";
   return key ? channelMap[key].full : connection.provider;
 }
 
 // Таблица CS макета: подключено · ошибка · не проверено.
 const CONNECTION_STATUS_META: Record<string, { text: string; bg: string; color: string }> = {
-  OK: { text: "Подключено", bg: "var(--success-bg)", color: "var(--success-text)" },
-  ERROR: { text: "Ошибка", bg: "var(--error-bg)", color: "var(--error-text)" },
+  OK: { text: t("common.connected"), bg: "var(--success-bg)", color: "var(--success-text)" },
+  ERROR: { text: t("common.error"), bg: "var(--error-bg)", color: "var(--error-text)" },
 };
 
 export function connectionStatusMeta(status: string): { text: string; bg: string; color: string } {
-  return CONNECTION_STATUS_META[status] ?? { text: "Не проверено", bg: "var(--n-9)", color: "var(--n-4)" };
+  return CONNECTION_STATUS_META[status] ?? { text: t("ai.not_checked"), bg: "var(--n-9)", color: "var(--n-4)" };
 }
 
 /** «5 открытых диалогов» / «нет диалогов» — подзаголовок шапки карточки. */
 export function openDialogsLine(count: number): string {
-  return count === 0 ? "нет диалогов" : pluralRu(count, ["открытый диалог", "открытых диалога", "открытых диалогов"]);
+  return count === 0 ? t("ai.no_conversations") : tn("plural.open_conversations", count);
 }
 
 /** «создан 12 мар 2026»; созданный сегодня — «сегодня» (кадр G5). */
 export function createdLabel(value: string, now = new Date()): string {
   const date = new Date(value);
   if (Number.isNaN(date.getTime())) return "";
-  if (date.toDateString() === now.toDateString()) return "сегодня";
+  if (date.toDateString() === now.toDateString()) return t("ai.today");
   return `${shortDate(date)} ${date.getFullYear()}`;
 }
 
@@ -217,9 +218,9 @@ export function knowledgeRows(card: AgentCard): AgentKnowledgeRow[] {
       id: item.id,
       title: item.title,
       icon: "doc",
-      chip: item.isEnabled ? "" : "Выключено",
+      chip: item.isEnabled ? "" : t("common.off"),
       chipTone: "muted",
-      meta: item.updatedAt ? `обновлено ${shortDate(item.updatedAt)}` : "",
+      meta: item.updatedAt ? t("ai.updated_on", { date: shortDate(item.updatedAt) }) : "",
       href: "",
     })),
     ...card.portalArticles.map((article): AgentKnowledgeRow => ({
@@ -228,9 +229,9 @@ export function knowledgeRows(card: AgentCard): AgentKnowledgeRow[] {
       id: article.id,
       title: article.title,
       icon: "globe",
-      chip: `Портал · ${article.portal.name}`,
+      chip: t("ai.portal_named", { name: article.portal.name }),
       chipTone: "accent",
-      meta: "статья",
+      meta: t("ai.article_meta"),
       href: article.publicUrl,
     })),
   ];
@@ -241,12 +242,12 @@ export function knowledgeLine(card: AgentCard): string {
   const knowledge = card.knowledge.length;
   const articles = card.portalArticles.length;
   const selected = knowledge + articles;
-  if (selected === 0) return "ничего не выбрано";
-  const head = `${selected} из ${card.knowledgeTotal}`;
+  if (selected === 0) return t("ai.nothing_selected");
+  const head = t("common.n_of_m", { selected, total: card.knowledgeTotal });
   if (knowledge === 0 || articles === 0) return head;
   const parts = [
-    pluralRu(knowledge, ["знание", "знания", "знаний"]),
-    pluralRu(articles, ["статья", "статьи", "статей"]),
+    tn("plural.knowledge", knowledge),
+    tn("plural.articles", articles),
   ];
   return `${head} · ${parts.join(" + ")}`;
 }
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeAgentDialog.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeAgentDialog.tsx
index 6c68129..6488954 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeAgentDialog.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeAgentDialog.tsx
@@ -4,9 +4,9 @@ import { useState } from "react";
 import { Icon } from "../../../shared/icons";
 import { Segmented } from "../../../shared/ui";
 import { Button } from "../../../shared/ui-controls";
-import { pluralRu } from "../../../shared/utils";
 import type { AgentRef } from "../../agents/model";
 import type { KnowledgeItem } from "./types";
+import { t, tn } from "../../../i18n";
 
 // Прикрепление знаний к агенту (дизайн-базлайн v2, кадр KB3). Один агент за
 // операцию: SPEC-CHATBALLS-0029 §6 требует атомарности и журналирования, поэтому
@@ -14,9 +14,8 @@ import type { KnowledgeItem } from "./types";
 
 type Mode = "attach" | "detach";
 
-const MODES: Array<[Mode, string]> = [["attach", "Прикрепить"], ["detach", "Открепить"]];
+const MODES: Array<[Mode, string]> = [["attach", t("common.attach")], ["detach", t("common.detach")]];
 
-const KNOWLEDGE_FORMS: [string, string, string] = ["знание", "знания", "знаний"];
 
 type Skip = { item: KnowledgeItem; reason: string };
 
@@ -29,18 +28,18 @@ function skipsFor(items: KnowledgeItem[], agent: AgentRef | null, mode: Mode): S
   items.forEach((item) => {
     const attached = (item.agentIds ?? []).includes(agentId);
     if (mode === "attach") {
-      if (attached) skips.push({ item, reason: "уже прикреплён к этому агенту" });
-      else if (!item.isEnabled) skips.push({ item, reason: "выключен в ответах" });
+      if (attached) skips.push({ item, reason: t("ai.already_attached_agent") });
+      else if (!item.isEnabled) skips.push({ item, reason: t("ai.switched_off_replies") });
     } else if (!attached) {
-      skips.push({ item, reason: "не прикреплён к этому агенту" });
+      skips.push({ item, reason: t("ai.not_attached_agent") });
     }
   });
   return skips;
 }
 
 function agentMeta(agent: AgentRef): string {
-  if (agent.aiStatus !== "ACTIVE") return "Без AI — знания не используются";
-  return `AI отвечает · ${pluralRu(agent.knowledgeCount, KNOWLEDGE_FORMS)} прикреплено`;
+  if (agent.aiStatus !== "ACTIVE") return t("ai.no_ai_knowledge_not_used");
+  return t("ai.ai_replies_attached", { count: tn("plural.knowledge", agent.knowledgeCount) });
 }
 
 export function KnowledgeAgentDialog({
@@ -67,10 +66,10 @@ export function KnowledgeAgentDialog({
       <header className="knowledge-agent-dialog-head">
         <div className="knowledge-agent-dialog-title">
           <div>
-            <h3>{mode === "attach" ? "Прикрепить к агенту" : "Открепить от агента"}</h3>
-            <p>Выбрано {pluralRu(items.length, KNOWLEDGE_FORMS)}. Один агент за операцию — так видно, что именно изменилось.</p>
+            <h3>{mode === "attach" ? t("ai.attach_agent") : t("ai.detach_from_agent")}</h3>
+            <p>{t("ai.selected_one_agent_note", { count: tn("plural.knowledge", items.length) })}</p>
           </div>
-          <button aria-label="Закрыть" className="knowledge-dialog-close" title="Закрыть" type="button" onClick={onCancel}>
+          <button aria-label={t("common.close")} className="knowledge-dialog-close" title={t("common.close")} type="button" onClick={onCancel}>
             <Icon name="close" size={15} strokeWidth={2.2} />
           </button>
         </div>
@@ -78,7 +77,7 @@ export function KnowledgeAgentDialog({
       </header>
 
       <div className="knowledge-agent-dialog-body">
-        <span className="knowledge-agent-dialog-label">АГЕНТ</span>
+        <span className="knowledge-agent-dialog-label">{t("ai.agent")}</span>
         <div className="knowledge-agent-picks">
           {agents.map((item) => {
             const picked = item.aiAgentId === agentId;
@@ -95,11 +94,11 @@ export function KnowledgeAgentDialog({
                   <strong>{item.name}</strong>
                   <small>{agentMeta(item)}</small>
                 </span>
-                <small className="knowledge-agent-tag">{picked ? "выбран" : noAi ? "без AI" : "доступен"}</small>
+                <small className="knowledge-agent-tag">{picked ? t("ai.selected") : noAi ? t("ai.no_ai") : t("ai.available")}</small>
               </button>
             );
           })}
-          {agents.length === 0 && <p className="knowledge-agent-empty">Агентов пока нет — создайте агента, чтобы прикреплять к нему знания.</p>}
+          {agents.length === 0 && <p className="knowledge-agent-empty">{t("ai.there_no_agents_yet_create")}</p>}
         </div>
       </div>
 
@@ -107,24 +106,22 @@ export function KnowledgeAgentDialog({
         <div className="knowledge-agent-warning">
           <Icon name="alert" size={16} strokeWidth={2} />
           <span>
-            <b>{skips.length} из {items.length} будут пропущены:</b>{" "}
-            {skips.map((skip) => `«${skip.item.title}» ${skip.reason}`).join(", ")}. Состав знаний
-            агента по ним не изменится.
+            <b>{t("ai.skips_summary", { skipped: skips.length, total: items.length })}</b>{" "}
+            {skips.map((skip) => `«${skip.item.title}» ${skip.reason}`).join(", ")}. {t("ai.skips_tail")}
           </span>
         </div>
       )}
 
       <footer className="knowledge-agent-dialog-foot">
-        <span>
-          Операция атомарна: при недоступном идентификаторе не меняется ничего. Требуется право <code>ai.manage</code>.
+        <span>{t("ai.operation_atomic_if_any_identifier")}<code>ai.manage</code>.
         </span>
-        <Button variant="secondary" disabled={busy} onClick={onCancel}>Отмена</Button>
+        <Button variant="secondary" disabled={busy} onClick={onCancel}>{t("common.cancel")}</Button>
         <Button
           variant="primary"
           disabled={busy || agentId === null || applied === 0}
           onClick={() => agentId !== null && onSubmit(agentId, mode)}
         >
-          {mode === "attach" ? "Прикрепить" : "Открепить"} {applied}
+          {mode === "attach" ? t("common.attach") : t("common.detach")} {applied}
         </Button>
       </footer>
     </Modal>
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeBulkBar.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeBulkBar.tsx
index b35c5e2..1f41de1 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeBulkBar.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeBulkBar.tsx
@@ -1,5 +1,5 @@
 import { Icon } from "../../../shared/icons";
-import { pluralRu } from "../../../shared/utils";
+import { t, tn } from "../../../i18n";
 
 // Панель массовых операций (дизайн-базлайн v2, кадр KB2): тёмная плашка по
 // центру снизу, пока живо выделение. Прикрепление к агенту — главное действие.
@@ -26,26 +26,21 @@ export function KnowledgeBulkBar({
   return (
     <div className="knowledge-bulk-bar">
       <span className="knowledge-bulk-count">
-        <strong>Выбрано {count}</strong>
-        <small>{pluralRu(count, ["знание", "знания", "знаний"]).replace(`${count} `, "")}</small>
+        <strong>{t("common.selected_count", { count })}</strong>
+        <small>{tn("plural.knowledge", count).replace(`${count} `, "")}</small>
       </span>
       <button className="is-primary" disabled={busy} type="button" onClick={onAttach}>
-        <Icon name="robot" size={14} strokeWidth={1.9} />Прикрепить к агенту
-      </button>
+        <Icon name="robot" size={14} strokeWidth={1.9} />{t("ai.attach_agent")}</button>
       <button disabled={busy} type="button" onClick={onMove}>
-        <Icon name="move" size={14} strokeWidth={1.9} />Переместить
-      </button>
+        <Icon name="move" size={14} strokeWidth={1.9} />{t("ai.move")}</button>
       <button disabled={busy} type="button" onClick={onEnable}>
-        <Icon name="eye" size={14} strokeWidth={1.9} />Включить
-      </button>
+        <Icon name="eye" size={14} strokeWidth={1.9} />{t("ai.turn")}</button>
       <button disabled={busy} type="button" onClick={onDisable}>
-        <Icon name="eyeOff" size={14} strokeWidth={1.9} />Выключить
-      </button>
+        <Icon name="eyeOff" size={14} strokeWidth={1.9} />{t("ai.turn_off")}</button>
       <button className="is-danger" disabled={busy} type="button" onClick={onRemove}>
-        <Icon name="trash" size={14} strokeWidth={1.9} />Удалить
-      </button>
+        <Icon name="trash" size={14} strokeWidth={1.9} />{t("common.delete")}</button>
       <i className="knowledge-bulk-divider" />
-      <button aria-label="Снять выделение" className="knowledge-bulk-close" title="Снять выделение" type="button" onClick={onClear}>
+      <button aria-label={t("ai.clear_selection")} className="knowledge-bulk-close" title={t("ai.clear_selection")} type="button" onClick={onClear}>
         <Icon name="close" size={15} strokeWidth={2.2} />
       </button>
     </div>
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeCardPage.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeCardPage.tsx
index 0df8ae7..1136444 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeCardPage.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeCardPage.tsx
@@ -5,7 +5,7 @@ import { DecisionDialog } from "../../../shared/DecisionDialog";
 import { Icon } from "../../../shared/icons";
 import { EmptyState, LoadingState } from "../../../shared/ui";
 import { Button, CopyButton } from "../../../shared/ui-controls";
-import { pluralRu, shortDateTime } from "../../../shared/utils";
+import { shortDateTime } from "../../../shared/utils";
 import type { RouteKey } from "../../../types";
 import type { AgentRef } from "../../agents/model";
 import { MarkdownContent } from "../../help-center/MarkdownContent";
@@ -27,6 +27,7 @@ import {
   type KnowledgeItem,
 } from "./model";
 import { useKnowledgeCategories } from "./useKnowledgeCategories";
+import { fmt, t, tn } from "../../../i18n";
 
 // Карточка знания (дизайн-базлайн v2, кадр KB4): шапка как у портала —
 // состояние в ответах, фрагменты и агенты чипами; тело — содержимое до 720px
@@ -87,9 +88,9 @@ export function KnowledgeCardPage({
     }
   }
 
-  if (!knowledgeId) return <div className="knowledge-card"><EmptyState title="Знание не выбрано" /></div>;
+  if (!knowledgeId) return <div className="knowledge-card"><EmptyState title={t("ai.no_knowledge_item_selected")} /></div>;
   if (loading || catalog.loading) return <div className="knowledge-card"><LoadingState /></div>;
-  if (failed || catalog.error || !item) return <div className="knowledge-card"><EmptyState title="Не удалось загрузить знание" /></div>;
+  if (failed || catalog.error || !item) return <div className="knowledge-card"><EmptyState title={t("ai.could_not_load_knowledge_item")} /></div>;
 
   const path = knowledgeCategoryPath(catalog.categories, item.category.id);
   const crumbs = path ? path.split(" / ") : [item.category.name];
@@ -98,18 +99,18 @@ export function KnowledgeCardPage({
   const characters = (item.content ?? "").length;
 
   const menuItems = canManage ? [
-    { key: "move", label: <button type="button" onClick={() => setMovingOpen(true)}><Icon name="move" size={15} strokeWidth={1.9} />Переместить в категорию</button> },
-    { key: "answers", label: <button type="button" onClick={() => void run(() => updateKnowledgeItem(item.id, { isEnabled: !item.isEnabled }), "Не удалось изменить участие в ответах")}><Icon name={item.isEnabled ? "eyeOff" : "eye"} size={15} strokeWidth={1.9} />{item.isEnabled ? "Выключить в ответах" : "Включить в ответах"}</button> },
-    { key: "reindex", label: <button type="button" onClick={() => void run(() => reindexKnowledge(item.id), "Не удалось переиндексировать знание")}><Icon name="undo" size={15} strokeWidth={1.9} />Переиндексировать</button> },
+    { key: "move", label: <button type="button" onClick={() => setMovingOpen(true)}><Icon name="move" size={15} strokeWidth={1.9} />{t("ai.move_category")}</button> },
+    { key: "answers", label: <button type="button" onClick={() => void run(() => updateKnowledgeItem(item.id, { isEnabled: !item.isEnabled }), t("ai.could_not_change_participation_replies"))}><Icon name={item.isEnabled ? "eyeOff" : "eye"} size={15} strokeWidth={1.9} />{item.isEnabled ? t("ai.switch_off_replies") : t("ai.switch_replies")}</button> },
+    { key: "reindex", label: <button type="button" onClick={() => void run(() => reindexKnowledge(item.id), t("ai.could_not_reindex_knowledge_item"))}><Icon name="undo" size={15} strokeWidth={1.9} />{t("ai.reindex")}</button> },
     { key: "divider", type: "divider" as const },
-    { key: "delete", label: <button className="danger" type="button" onClick={() => setDeleteOpen(true)}><Icon name="trash" size={15} strokeWidth={1.9} />Удалить знание</button> },
+    { key: "delete", label: <button className="danger" type="button" onClick={() => setDeleteOpen(true)}><Icon name="trash" size={15} strokeWidth={1.9} />{t("ai.delete_knowledge_item")}</button> },
   ] : [];
 
   return (
     <section className="knowledge-card">
       <div className="knowledge-card-head">
         <nav className="knowledge-breadcrumbs">
-          <button className="link is-strong" type="button" onClick={() => setRoute("knowledge")}>База знаний</button>
+          <button className="link is-strong" type="button" onClick={() => setRoute("knowledge")}>{t("common.knowledge_base")}</button>
           {crumbs.map((crumb, index) => (
             <span key={`${crumb}-${index}`}>
               <span className="knowledge-crumb-sep">/</span>
@@ -122,35 +123,31 @@ export function KnowledgeCardPage({
             <div className="knowledge-card-title">
               <h2>{item.title}</h2>
               <span className={`knowledge-answer-pill${item.isEnabled ? " is-on" : ""}`}>
-                <i />{item.isEnabled ? "В ответах агента" : "Не участвует в ответах"}
+                <i />{item.isEnabled ? t("ai.agent_s_replies") : t("ai.not_used_replies")}
               </span>
             </div>
             <div className="knowledge-card-chips">
               <span className="knowledge-chip">
                 <Icon name="box" size={14} strokeWidth={1.9} />
-                {pluralRu(fragments, ["фрагмент", "фрагмента", "фрагментов"])} · пересобраны {shortDateTime(item.updatedAt)}
+                {t("ai.chunks_rebuilt_at", { chunks: tn("plural.chunks", fragments), date: shortDateTime(item.updatedAt) })}
               </span>
               <span className="knowledge-chip">
                 <Icon name="robot" size={14} strokeWidth={1.9} />
-                {pluralRu(attached.length, ["агент", "агента", "агентов"])}
+                {tn("plural.agents", attached.length)}
               </span>
-              {item.updatedBy && <span className="knowledge-card-author">обновил {item.updatedBy} · {shortDateTime(item.updatedAt)}</span>}
+              {item.updatedBy && <span className="knowledge-card-author">{t("ai.updated_by_at", { name: item.updatedBy, date: shortDateTime(item.updatedAt) })}</span>}
             </div>
           </div>
           <div className="knowledge-card-actions">
             {canManage && (
-              <Button variant="secondary" className="knowledge-secondary-action" icon="robot" onClick={() => setAttachOpen(true)}>
-                Прикрепить к агенту
-              </Button>
+              <Button variant="secondary" className="knowledge-secondary-action" icon="robot" onClick={() => setAttachOpen(true)}>{t("ai.attach_agent")}</Button>
             )}
             {canManage && (
-              <Button variant="primary" className="knowledge-primary-action" icon="edit" onClick={() => openKnowledgeEditor(item.id)}>
-                Редактировать
-              </Button>
+              <Button variant="primary" className="knowledge-primary-action" icon="edit" onClick={() => openKnowledgeEditor(item.id)}>{t("common.edit_item")}</Button>
             )}
             {canManage && (
               <Dropdown menu={{ items: menuItems }} overlayClassName="app-dropdown is-knowledge-menu" placement="bottomRight" trigger={["click"]}>
-                <button aria-label="Ещё" className="knowledge-more-button" title="Ещё" type="button">
+                <button aria-label={t("common.more")} className="knowledge-more-button" title={t("common.more")} type="button">
                   <Icon name="more" size={16} strokeWidth={2} />
                 </button>
               </Dropdown>
@@ -172,23 +169,23 @@ export function KnowledgeCardPage({
         <aside className="knowledge-rail">
           <div className="knowledge-rail-block is-top">
             <div>
-              <span className="knowledge-rail-label">КАТЕГОРИЯ</span>
+              <span className="knowledge-rail-label">{t("common.category")}</span>
               <span className="knowledge-rail-category">
                 <Icon name="folder" size={13} strokeWidth={1.8} />{path || item.category.name}
               </span>
             </div>
             <div className="knowledge-rail-toggle">
               <span>
-                <strong>Участвует в ответах</strong>
-                <small>выключенное знание не попадает в retrieval</small>
+                <strong>{t("ai.used_replies")}</strong>
+                <small>{t("ai.switched_off_item_never_reaches")}</small>
               </span>
               <button
-                aria-label="Участвует в ответах"
+                aria-label={t("ai.used_replies")}
                 aria-pressed={item.isEnabled}
                 className={`knowledge-switch${item.isEnabled ? " is-on" : ""}`}
                 disabled={!canManage || busy}
                 type="button"
-                onClick={() => void run(() => updateKnowledgeItem(item.id, { isEnabled: !item.isEnabled }), "Не удалось изменить участие в ответах")}
+                onClick={() => void run(() => updateKnowledgeItem(item.id, { isEnabled: !item.isEnabled }), t("ai.could_not_change_participation_replies"))}
               >
                 <i />
               </button>
@@ -197,8 +194,8 @@ export function KnowledgeCardPage({
 
           <div className="knowledge-rail-block">
             <div className="knowledge-rail-head">
-              <span>ВЛОЖЕНИЯ</span>
-              <small>ссылки уходят в ответ агента</small>
+              <span>{t("ai.attachments")}</span>
+              <small>{t("ai.links_go_out_agent_s")}</small>
             </div>
             <div className="knowledge-rail-files">
               {item.attachments.map((attachment) => (
@@ -211,14 +208,14 @@ export function KnowledgeCardPage({
                   <CopyButton className="knowledge-rail-file-copy" label="" value={attachment.url} />
                 </div>
               ))}
-              {item.attachments.length === 0 && <p className="knowledge-rail-empty">Вложений нет.</p>}
+              {item.attachments.length === 0 && <p className="knowledge-rail-empty">{t("ai.no_attachments")}</p>}
             </div>
           </div>
 
           <div className="knowledge-rail-block">
             <div className="knowledge-rail-head">
-              <span>АГЕНТЫ</span>
-              {canManage && <button type="button" onClick={() => setAttachOpen(true)}>Изменить</button>}
+              <span>{t("common.agents_2")}</span>
+              {canManage && <button type="button" onClick={() => setAttachOpen(true)}>{t("common.edit")}</button>}
             </div>
             <div className="knowledge-rail-agents">
               {attached.map(({ agent, meta, answering }) => (
@@ -228,30 +225,29 @@ export function KnowledgeCardPage({
                     <strong>{agent.name}</strong>
                     <small>{meta}</small>
                   </span>
-                  <small className={`knowledge-agent-state${answering ? " is-on" : ""}`}>{answering ? "активен" : "не в ответах"}</small>
+                  <small className={`knowledge-agent-state${answering ? " is-on" : ""}`}>{answering ? t("ai.active") : t("ai.not_replies")}</small>
                 </div>
               ))}
-              {attached.length === 0 && <p className="knowledge-rail-empty">Знание не прикреплено ни к одному агенту — в ответах оно не используется.</p>}
+              {attached.length === 0 && <p className="knowledge-rail-empty">{t("ai.item_attached_no_agent_so")}</p>}
             </div>
           </div>
 
           <div className="knowledge-rail-block">
-            <span className="knowledge-rail-label">ИНДЕКСАЦИЯ</span>
+            <span className="knowledge-rail-label">{t("ai.indexing")}</span>
             <div className="knowledge-index-box">
               <div className="knowledge-index-count">
                 <strong>{fragments}</strong>
-                <span>фрагментов · {characters.toLocaleString("ru-RU")} знаков</span>
+                <span>{t("ai.chunks_and_characters", { characters: fmt.number(characters) })}</span>
               </div>
-              <p>Фрагменты пересобираются при сохранении. Пока идёт пересборка, агент отвечает по прежней версии.</p>
+              <p>{t("ai.chunks_rebuilt_save_while_rebuild")}</p>
               {canManage && (
                 <button
                   className="knowledge-reindex-button"
                   disabled={busy}
                   type="button"
-                  onClick={() => void run(() => reindexKnowledge(item.id), "Не удалось переиндексировать знание")}
+                  onClick={() => void run(() => reindexKnowledge(item.id), t("ai.could_not_reindex_knowledge_item"))}
                 >
-                  <Icon name="undo" size={13} strokeWidth={1.9} />Переиндексировать
-                </button>
+                  <Icon name="undo" size={13} strokeWidth={1.9} />{t("ai.reindex")}</button>
               )}
             </div>
           </div>
@@ -268,7 +264,7 @@ export function KnowledgeCardPage({
             setAttachOpen(false);
             void run(
               () => linkKnowledgeToAgent({ agentId, action: mode, knowledgeIds: [item.id] }),
-              "Не удалось изменить знания агента",
+              t("ai.could_not_change_agent_s"),
             );
           }}
         />
@@ -287,7 +283,7 @@ export function KnowledgeCardPage({
                 await bulkMoveKnowledge({ knowledgeIds: [item.id], categoryId });
                 await catalog.reload();
               },
-              "Не удалось переместить знание",
+              t("ai.could_not_move_knowledge_item"),
             );
           }}
         />
@@ -298,10 +294,10 @@ export function KnowledgeCardPage({
         onClose={() => setDeleteOpen(false)}
         tone="danger"
         icon="trash"
-        title="Удалить знание?"
-        description={`«${item.title}» и его вложения будут удалены. У агентов, которым знание прикреплено, оно исчезнет из ответов.`}
+        title={t("ai.delete_knowledge_item_2")}
+        description={t("ai.item_and_files_deleted", { title: item.title })}
         actions={<>
-          <Button variant="secondary" onClick={() => setDeleteOpen(false)}>Отмена</Button>
+          <Button variant="secondary" onClick={() => setDeleteOpen(false)}>{t("common.cancel")}</Button>
           <Button
             variant="danger-outline"
             disabled={busy}
@@ -310,11 +306,9 @@ export function KnowledgeCardPage({
               setBusy(true);
               void deleteKnowledgeItem(item.id)
                 .then(() => setRoute("knowledge"))
-                .catch(() => { setError("Не удалось удалить знание"); setBusy(false); });
+                .catch(() => { setError(t("ai.could_not_delete_knowledge_item")); setBusy(false); });
             }}
-          >
-            Удалить
-          </Button>
+          >{t("common.delete")}</Button>
         </>}
       />
     </section>
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoriesPage.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoriesPage.tsx
index 9d014b8..5173310 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoriesPage.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoriesPage.tsx
@@ -4,7 +4,6 @@ import { DecisionDialog } from "../../../shared/DecisionDialog";
 import { Icon } from "../../../shared/icons";
 import { LoadingState } from "../../../shared/ui";
 import { Button } from "../../../shared/ui-controls";
-import { pluralRu } from "../../../shared/utils";
 import {
   buildCategoryTree,
   planCategoryDrop,
@@ -18,6 +17,7 @@ import {
   updateKnowledgeCategory,
 } from "./model";
 import { useKnowledgeCategories } from "./useKnowledgeCategories";
+import { t, tn } from "../../../i18n";
 
 // Категории знаний (дизайн-базлайн v2, кадр KB7): отдельный экран, а не
 // модалка — дерево строками с перетаскиванием, инлайн-переименованием и
@@ -31,17 +31,17 @@ function flatten(nodes: ManagedContentCategoryNode[], depth = 0): Row[] {
 
 /** «18 знаний · 2 вложенные» — подпись строки категории. */
 function countLabel(node: ManagedContentCategoryNode): string {
-  if (node.count === 0 && node.children.length === 0) return "пусто";
-  const knowledge = pluralRu(node.count, ["знание", "знания", "знаний"]);
+  if (node.count === 0 && node.children.length === 0) return t("ai.empty");
+  const knowledge = tn("plural.knowledge", node.count);
   if (node.children.length === 0) return knowledge;
-  return `${knowledge} · ${pluralRu(node.children.length, ["вложенная", "вложенные", "вложенных"])}`;
+  return `${knowledge} · ${tn("plural.nested", node.children.length)}`;
 }
 
 /** Почему нельзя удалить: системная, есть вложенные, есть материалы. */
 function deleteBlock(node: ManagedContentCategoryNode): string | null {
-  if (node.isSystem) return "системная категория";
-  if (node.children.length > 0) return "есть вложенные категории";
-  if (node.count > 0) return "категория не пуста";
+  if (node.isSystem) return t("ai.system_category");
+  if (node.children.length > 0) return t("ai.has_nested_categories");
+  if (node.count > 0) return t("ai.category_not_empty");
   return null;
 }
 
@@ -94,7 +94,7 @@ export function KnowledgeCategoriesPage({
       cancel();
       await catalog.reload();
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось изменить категории");
+      setError(caught instanceof Error ? caught.message : t("shared.could_not_change_categories"));
     } finally {
       setBusy(false);
     }
@@ -124,11 +124,11 @@ export function KnowledgeCategoriesPage({
     <section className="knowledge-card">
       <div className="knowledge-card-head is-plain">
         <nav className="knowledge-breadcrumbs">
-          <button className="link is-strong" type="button" onClick={() => setRoute("knowledge")}>База знаний</button>
-          <span><span className="knowledge-crumb-sep">/</span><b>Категории</b></span>
+          <button className="link is-strong" type="button" onClick={() => setRoute("knowledge")}>{t("common.knowledge_base")}</button>
+          <span><span className="knowledge-crumb-sep">/</span><b>{t("common.categories")}</b></span>
         </nav>
-        <h2>Категории</h2>
-        <p>Дерево до трёх уровней. Перетащите строку, чтобы сменить родителя или порядок.</p>
+        <h2>{t("common.categories")}</h2>
+        <p>{t("ai.tree_up_three_levels_deep")}</p>
       </div>
 
       <div className="knowledge-plain-body">
@@ -151,7 +151,7 @@ export function KnowledgeCategoriesPage({
                       drop(node.id, dropPosition(event, Boolean(node.isSystem)));
                     }}
                   >
-                    <span className="knowledge-category-grip" title="Перетащить"><Icon name="grip" size={15} strokeWidth={2} /></span>
+                    <span className="knowledge-category-grip" title={t("ai.drag")}><Icon name="grip" size={15} strokeWidth={2} /></span>
                     {editing ? (
                       <>
                         <input
@@ -176,23 +176,21 @@ export function KnowledgeCategoriesPage({
                             if (!name || name === node.name) cancel();
                             else void run(() => updateKnowledgeCategory(node.id, { name }));
                           }}
-                        >
-                          Готово
-                        </button>
-                        <button className="knowledge-category-cancel" type="button" onClick={cancel}>Отмена</button>
+                        >{t("common.done")}</button>
+                        <button className="knowledge-category-cancel" type="button" onClick={cancel}>{t("common.cancel")}</button>
                       </>
                     ) : (
                       <>
                         <span className="knowledge-category-name">
                           <strong style={{ fontWeight: depth === 0 ? 600 : 500 }}>{node.name}</strong>
-                          {node.isSystem && <small className="knowledge-category-tag">системная</small>}
+                          {node.isSystem && <small className="knowledge-category-tag">{t("ai.system")}</small>}
                         </span>
                         <small className="knowledge-category-count">{countLabel(node)}</small>
                         {canManage && (
                           <span className="knowledge-category-actions">
                             <button
                               disabled={depth >= 2}
-                              title={depth >= 2 ? "Глубже трёх уровней категории не вкладываются" : "Добавить вложенную"}
+                              title={depth >= 2 ? t("ai.categories_do_not_nest_deeper") : t("ai.add_nested_one")}
                               type="button"
                               onClick={() => { setEditingId(null); setCreateParentId(node.id); setDraftName(""); }}
                             >
@@ -200,7 +198,7 @@ export function KnowledgeCategoriesPage({
                             </button>
                             <button
                               disabled={Boolean(node.isSystem)}
-                              title={node.isSystem ? "Системную категорию нельзя переименовать" : "Переименовать"}
+                              title={node.isSystem ? t("ai.system_category_cannot_renamed") : t("ai.rename")}
                               type="button"
                               onClick={() => { setCreateParentId(undefined); setEditingId(node.id); setDraftName(node.name); }}
                             >
@@ -208,7 +206,7 @@ export function KnowledgeCategoriesPage({
                             </button>
                             <button
                               className={`knowledge-category-delete${block ? " is-blocked" : ""}`}
-                              title={block ? `Удалить нельзя: ${block}` : "Удалить категорию"}
+                              title={block ? t("ai.cannot_delete_because", { reason: block }) : t("ai.delete_category")}
                               type="button"
                               onClick={() => (block
                                 ? setBlocked({ name: node.name, reason: block })
@@ -226,7 +224,7 @@ export function KnowledgeCategoriesPage({
                       <span className="knowledge-category-grip" />
                       <input
                         autoFocus
-                        placeholder="Название категории"
+                        placeholder={t("shared.category_name")}
                         value={draftName}
                         onChange={(event) => setDraftName(event.target.value)}
                         onKeyDown={(event) => {
@@ -234,8 +232,8 @@ export function KnowledgeCategoriesPage({
                           if (event.key === "Escape") cancel();
                         }}
                       />
-                      <button className="knowledge-category-save" disabled={!draftName.trim()} type="button" onClick={saveCreate}>Готово</button>
-                      <button className="knowledge-category-cancel" type="button" onClick={cancel}>Отмена</button>
+                      <button className="knowledge-category-save" disabled={!draftName.trim()} type="button" onClick={saveCreate}>{t("common.done")}</button>
+                      <button className="knowledge-category-cancel" type="button" onClick={cancel}>{t("common.cancel")}</button>
                     </div>
                   )}
                 </div>
@@ -247,7 +245,7 @@ export function KnowledgeCategoriesPage({
                 <span className="knowledge-category-grip" />
                 <input
                   autoFocus
-                  placeholder="Название категории"
+                  placeholder={t("shared.category_name")}
                   value={draftName}
                   onChange={(event) => setDraftName(event.target.value)}
                   onKeyDown={(event) => {
@@ -255,35 +253,34 @@ export function KnowledgeCategoriesPage({
                     if (event.key === "Escape") cancel();
                   }}
                 />
-                <button className="knowledge-category-save" disabled={!draftName.trim()} type="button" onClick={saveCreate}>Готово</button>
-                <button className="knowledge-category-cancel" type="button" onClick={cancel}>Отмена</button>
+                <button className="knowledge-category-save" disabled={!draftName.trim()} type="button" onClick={saveCreate}>{t("common.done")}</button>
+                <button className="knowledge-category-cancel" type="button" onClick={cancel}>{t("common.cancel")}</button>
               </div>
             )}
 
             {canManage && (
               <div className="knowledge-categories-foot">
                 <button type="button" onClick={() => { setEditingId(null); setCreateParentId(null); setDraftName(""); }}>
-                  <Icon name="plus" size={14} strokeWidth={2} />Категория верхнего уровня
-                </button>
+                  <Icon name="plus" size={14} strokeWidth={2} />{t("ai.top_level_category")}</button>
               </div>
             )}
           </div>
 
           <div className="knowledge-categories-side">
             <div className="knowledge-rules-card">
-              <strong>Правила</strong>
+              <strong>{t("ai.rules")}</strong>
               <ul>
-                <li>Имя уникально внутри родителя.</li>
-                <li>Категорию нельзя перенести внутрь себя.</li>
-                <li>Удаление — только для пустой категории без вложенных.</li>
-                <li>«Без категории» системная: не переименовывается и не удаляется.</li>
+                <li>{t("ai.name_unique_within_its_parent")}</li>
+                <li>{t("ai.category_cannot_moved_inside_itself")}</li>
+                <li>{t("ai.only_empty_category_with_nothing")}</li>
+                <li>{t("ai.no_category_system_one_cannot")}</li>
               </ul>
             </div>
             {(blocked || error) && (
               <div className="knowledge-warning-card">
                 <Icon name="alert" size={16} strokeWidth={2} />
                 <span>
-                  {error || `«${blocked?.name}» удалить нельзя: ${blocked?.reason}. Сначала перенесите содержимое.`}
+                  {error || t("ai.cannot_delete_named", { name: blocked?.name ?? "", reason: blocked?.reason ?? "" })}
                 </span>
               </div>
             )}
@@ -296,10 +293,10 @@ export function KnowledgeCategoriesPage({
         onClose={() => setDeleting(null)}
         tone="danger"
         icon="trash"
-        title="Удалить категорию?"
-        description={deleting ? `Категория «${deleting.name}» пуста и будет удалена.` : ""}
+        title={t("shared.delete_category")}
+        description={deleting ? t("ai.category_empty_will_delete", { name: deleting.name }) : ""}
         actions={<>
-          <Button variant="secondary" onClick={() => setDeleting(null)}>Отмена</Button>
+          <Button variant="secondary" onClick={() => setDeleting(null)}>{t("common.cancel")}</Button>
           <Button
             variant="danger-outline"
             disabled={busy}
@@ -308,9 +305,7 @@ export function KnowledgeCategoriesPage({
               setDeleting(null);
               if (target) void run(() => deleteKnowledgeCategory(target.id));
             }}
-          >
-            Удалить
-          </Button>
+          >{t("common.delete")}</Button>
         </>}
       />
     </section>
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoryDialog.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoryDialog.tsx
index 9b557a2..cb9f731 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoryDialog.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeCategoryDialog.tsx
@@ -3,10 +3,10 @@ import { useState } from "react";
 
 import { Icon } from "../../../shared/icons";
 import { Button } from "../../../shared/ui-controls";
-import { pluralRu } from "../../../shared/utils";
 import { categoryRows } from "./knowledgeLibraryModel";
 import { knowledgeCategoryPath } from "./knowledgeTree";
 import type { KnowledgeCategory } from "./types";
+import { t, tn } from "../../../i18n";
 
 // «Переместить в категорию» из панели массовых операций (кадр KB2). Категории
 // не создаются на лету: список — то же дерево, что и слева в библиотеке.
@@ -32,17 +32,17 @@ export function KnowledgeCategoryDialog({
       <header className="knowledge-agent-dialog-head">
         <div className="knowledge-agent-dialog-title">
           <div>
-            <h3>Переместить в категорию</h3>
-            <p>Выбрано {pluralRu(count, ["знание", "знания", "знаний"])}. Категория задаёт размещение в дереве, на ответы агента она не влияет.</p>
+            <h3>{t("ai.move_category")}</h3>
+            <p>{t("ai.selected_category_note", { count: tn("plural.knowledge", count) })}</p>
           </div>
-          <button aria-label="Закрыть" className="knowledge-dialog-close" title="Закрыть" type="button" onClick={onCancel}>
+          <button aria-label={t("common.close")} className="knowledge-dialog-close" title={t("common.close")} type="button" onClick={onCancel}>
             <Icon name="close" size={15} strokeWidth={2.2} />
           </button>
         </div>
       </header>
 
       <div className="knowledge-agent-dialog-body">
-        <span className="knowledge-agent-dialog-label">КАТЕГОРИЯ</span>
+        <span className="knowledge-agent-dialog-label">{t("common.category")}</span>
         <div className="knowledge-move-list">
           {rows.map(({ category, depth, count: knowledgeCount }) => (
             <button
@@ -63,10 +63,8 @@ export function KnowledgeCategoryDialog({
 
       <footer className="knowledge-agent-dialog-foot">
         <span />
-        <Button variant="secondary" disabled={busy} onClick={onCancel}>Отмена</Button>
-        <Button variant="primary" disabled={busy || categoryId === null} onClick={() => categoryId !== null && onSubmit(categoryId)}>
-          Переместить
-        </Button>
+        <Button variant="secondary" disabled={busy} onClick={onCancel}>{t("common.cancel")}</Button>
+        <Button variant="primary" disabled={busy || categoryId === null} onClick={() => categoryId !== null && onSubmit(categoryId)}>{t("ai.move")}</Button>
       </footer>
     </Modal>
   );
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeEditorPage.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeEditorPage.tsx
index 277ed45..25250a6 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeEditorPage.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeEditorPage.tsx
@@ -31,6 +31,7 @@ import {
   type KnowledgeItem,
 } from "./model";
 import { useKnowledgeCategories } from "./useKnowledgeCategories";
+import { fmt, t, tn } from "../../../i18n";
 
 // Редактор знания (дизайн-базлайн v2, кадры KB5/KB6): тот же полноэкранный
 // split, что у статьи портала, — текст с панелью Markdown, предпросмотр и
@@ -39,28 +40,28 @@ import { useKnowledgeCategories } from "./useKnowledgeCategories";
 type Mode = "edit" | "split" | "view";
 
 const MODES: Array<[Mode, string, "edit" | "split" | "eye", string]> = [
-  ["edit", "Текст", "edit", "Только редактор"],
-  ["split", "Вместе", "split", "Текст и предпросмотр"],
-  ["view", "Просмотр", "eye", "Только предпросмотр"],
+  ["edit", t("ai.text"), "edit", t("ai.editor_only")],
+  ["split", t("ai.side_by_side"), "split", t("ai.text_preview")],
+  ["view", t("ai.preview"), "eye", t("ai.preview_only")],
 ];
 
 // Панель Markdown знания (кадр KB5): без кнопки «изображение» — любой файл
 // прикрепляется к знанию и ставится в текст ссылкой.
 const KNOWLEDGE_MARKDOWN_TOOLS: MarkdownTool[] = [
-  { key: "h1", title: "Заголовок 1", text: "H1" },
-  { key: "h2", title: "Заголовок 2", text: "H2" },
+  { key: "h1", title: t("ai.heading_1"), text: "H1" },
+  { key: "h2", title: t("ai.heading_2"), text: "H2" },
   { key: "divider-1", title: "", divider: true },
-  { key: "bold", title: "Полужирный", icon: "bold" },
-  { key: "italic", title: "Курсив", icon: "italic" },
-  { key: "link", title: "Ссылка", icon: "link" },
-  { key: "code", title: "Код", icon: "code" },
+  { key: "bold", title: t("ai.bold"), icon: "bold" },
+  { key: "italic", title: t("ai.italic"), icon: "italic" },
+  { key: "link", title: t("ai.link"), icon: "link" },
+  { key: "code", title: t("ai.code"), icon: "code" },
   { key: "divider-2", title: "", divider: true },
-  { key: "list", title: "Список", icon: "list" },
-  { key: "numlist", title: "Нумерованный список", icon: "numlist" },
-  { key: "quote", title: "Цитата", icon: "quote" },
-  { key: "table", title: "Таблица", icon: "table" },
+  { key: "list", title: t("ai.list"), icon: "list" },
+  { key: "numlist", title: t("ai.numbered_list"), icon: "numlist" },
+  { key: "quote", title: t("ai.quote"), icon: "quote" },
+  { key: "table", title: t("ai.table"), icon: "table" },
   { key: "divider-3", title: "", divider: true },
-  { key: "attach", title: "Прикрепить файл", icon: "attach", accent: true },
+  { key: "attach", title: t("common.attach_file"), icon: "attach", accent: true },
 ];
 
 function draftKey(knowledgeId: number | null): string {
@@ -127,7 +128,7 @@ export function KnowledgeEditorPage({
         categoryId: String(knowledge.category.id),
       });
     } catch {
-      setError("Не удалось загрузить знание");
+      setError(t("ai.could_not_load_knowledge_item"));
     } finally {
       setBusy(false);
     }
@@ -205,7 +206,7 @@ export function KnowledgeEditorPage({
         setAttachments((current) => [attachment, ...current.filter((item) => item.id !== attachment.id)]);
         if (insert) insertText(`\n${attachmentMarkdown(attachment)}\n`);
       } catch (caught) {
-        setError(caught instanceof Error ? caught.message : `Не удалось загрузить ${file.name}`);
+        setError(caught instanceof Error ? caught.message : t("ai.could_not_upload_file", { name: file.name }));
       } finally {
         setUploading(null);
       }
@@ -219,12 +220,12 @@ export function KnowledgeEditorPage({
       await deleteAttachment(loaded.id, attachment.id);
       setAttachments((current) => current.filter((item) => item.id !== attachment.id));
     } catch {
-      setError("Не удалось удалить вложение");
+      setError(t("ai.could_not_delete_attachment"));
     }
   }
 
   async function save() {
-    if (!ready) { setError("Укажите заголовок и категорию"); return; }
+    if (!ready) { setError(t("ai.give_title_category")); return; }
     setBusy(true);
     setError("");
     try {
@@ -249,7 +250,7 @@ export function KnowledgeEditorPage({
         openKnowledge(knowledge.id);
       }
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось сохранить знание");
+      setError(caught instanceof Error ? caught.message : t("ai.could_not_save_knowledge_item"));
     } finally {
       setBusy(false);
     }
@@ -271,7 +272,7 @@ export function KnowledgeEditorPage({
   }
 
   if (catalog.loading) return <div className="knowledge-editor"><LoadingState /></div>;
-  if (catalog.error) return <div className="knowledge-editor"><EmptyState title="Не удалось загрузить категории" /></div>;
+  if (catalog.error) return <div className="knowledge-editor"><EmptyState title={t("ai.could_not_load_categories")} /></div>;
 
   const chunks = knowledgeChunks(content);
 
@@ -279,23 +280,18 @@ export function KnowledgeEditorPage({
     <div className="knowledge-editor">
       <div className="knowledge-editor-head">
         <button className="knowledge-editor-back" type="button" onClick={() => (loaded ? openKnowledge(loaded.id) : setRoute("knowledge"))}>
-          <Icon name="chevronLeft" size={16} strokeWidth={2} />База знаний
-        </button>
+          <Icon name="chevronLeft" size={16} strokeWidth={2} />{t("common.knowledge_base")}</button>
         <span className="knowledge-editor-crumb">{categoryPath}</span>
         <span className="knowledge-editor-gap" />
         <span className={`knowledge-editor-badge${dirty ? " is-dirty" : ""}`}>
-          <i />{dirty ? "Есть несохранённые правки" : "Индекс актуален"}
+          <i />{dirty ? t("ai.there_unsaved_edits") : t("ai.index_up_date")}
         </span>
         <Segmented className="knowledge-editor-modes" items={MODES} value={mode} setValue={setMode} />
         {canManage && (
-          <Button variant="secondary" className="knowledge-editor-revert" disabled={busy || !dirty} onClick={revert}>
-            Отменить правки
-          </Button>
+          <Button variant="secondary" className="knowledge-editor-revert" disabled={busy || !dirty} onClick={revert}>{t("ai.discard_edits")}</Button>
         )}
         {canManage && (
-          <Button variant="primary" className="knowledge-editor-save" icon="check" disabled={busy || !ready} onClick={() => void save()}>
-            Сохранить и переиндексировать
-          </Button>
+          <Button variant="primary" className="knowledge-editor-save" icon="check" disabled={busy || !ready} onClick={() => void save()}>{t("ai.save_reindex")}</Button>
         )}
       </div>
 
@@ -306,11 +302,11 @@ export function KnowledgeEditorPage({
           <div className="knowledge-editor-column">
             <div className="knowledge-editor-title">
               <input
-                placeholder="Заголовок знания"
+                placeholder={t("ai.knowledge_item_title_2")}
                 value={title}
                 onChange={(event) => setTitle(event.target.value)}
               />
-              <span>Заголовок цитируется агентом в ответе клиенту — пишите его как ответ, не как папку.</span>
+              <span>{t("ai.agent_quotes_title_its_reply")}</span>
             </div>
 
             <div className="knowledge-md-toolbar">
@@ -366,8 +362,8 @@ export function KnowledgeEditorPage({
               {dropping && (
                 <div className="knowledge-editor-drop">
                   <Icon name="upload" size={30} strokeWidth={1.8} />
-                  <strong>Отпустите, чтобы приложить к знанию</strong>
-                  <span>Файл станет вложением и ссылкой в тексте — агент отдаёт её клиенту. PNG, JPG, PDF, DOCX, XLSX · до 25 МБ</span>
+                  <strong>{t("ai.drop_attach_item")}</strong>
+                  <span>{t("ai.file_becomes_attachment_link_text")}</span>
                 </div>
               )}
             </div>
@@ -378,10 +374,10 @@ export function KnowledgeEditorPage({
               <span className="knowledge-editor-gap" />
               <span>
                 {dirty
-                  ? "Правки не сохранены — фрагменты пересоберутся после «Сохранить»"
+                  ? t("ai.edits_not_saved_chunks_rebuilt")
                   : autoSavedAt
-                    ? `Сохранено автоматически в ${autoSavedAt.toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" })}`
-                    : "Всё сохранено"}
+                    ? t("time.autosaved_at", { time: fmt.time(autoSavedAt) })
+                    : t("ai.everything_saved")}
               </span>
             </div>
           </div>
@@ -390,35 +386,33 @@ export function KnowledgeEditorPage({
         {mode !== "edit" && (
           <div className="knowledge-preview-column">
             <div className="knowledge-preview-head">
-              <span>ПРЕДПРОСМОТР · {asAgent ? "КАК ОТВЕТИТ АГЕНТ" : "ВНУТРЕННИЙ МАТЕРИАЛ"}</span>
+              <span>{t("ai.preview_of", { what: asAgent ? t("ai.how_agent_will_answer") : t("ai.internal_material") })}</span>
               <span className="knowledge-editor-gap" />
               <button
                 className={asAgent ? "is-active" : ""}
-                title="Как это цитирует агент"
+                title={t("ai.how_agent_quotes")}
                 type="button"
                 onClick={() => setAsAgent((current) => !current)}
               >
-                <Icon name="message" size={13} strokeWidth={1.9} />Как ответит агент
-              </button>
+                <Icon name="message" size={13} strokeWidth={1.9} />{t("ai.how_agent_will_answer_2")}</button>
             </div>
             <div className="knowledge-preview-body">
               {asAgent ? (
                 <div className="knowledge-fragments">
                   <p className="knowledge-fragments-note">
-                    Агент отвечает не текстом целиком, а подходящими фрагментами. Так знание разойдётся
-                    на {chunks.length} {chunks.length === 1 ? "фрагмент" : "фрагментов"} при сохранении.
+                    {t("ai.fragments_note", { chunks: tn("plural.chunks", chunks.length) })}
                   </p>
                   {chunks.map((chunk, index) => (
                     <article className="knowledge-fragment" key={index}>
-                      <header><b>Фрагмент {index + 1}</b><small>{chunk.length} знаков</small></header>
+                      <header><b>{t("ai.fragment_number", { number: index + 1 })}</b><small>{t("ai.characters_count", { count: fmt.number(chunk.length) })}</small></header>
                       <p>{chunk}</p>
                     </article>
                   ))}
-                  {chunks.length === 0 && <p className="knowledge-rail-empty">Пустое знание в ответы не попадает.</p>}
+                  {chunks.length === 0 && <p className="knowledge-rail-empty">{t("ai.empty_item_never_reaches_replies")}</p>}
                 </div>
               ) : (
                 <article className="knowledge-preview-article">
-                  <h1>{title || "Без заголовка"}</h1>
+                  <h1>{title || t("ai.untitled")}</h1>
                   {description && <p className="knowledge-preview-lead">{description}</p>}
                   <MarkdownContent content={content} />
                   {attachments.map((attachment) => (
@@ -426,7 +420,7 @@ export function KnowledgeEditorPage({
                       <i><Icon name={isImageAttachment(attachment) ? "image" : "file"} size={15} strokeWidth={1.8} /></i>
                       <span>
                         <strong>{attachment.name}</strong>
-                        <small>вложение · ссылку агент отдаёт клиенту</small>
+                        <small>{t("ai.attachment_agent_hands_link_customer")}</small>
                       </span>
                     </div>
                   ))}
@@ -439,7 +433,7 @@ export function KnowledgeEditorPage({
         <aside className="knowledge-editor-rail">
           <div className="knowledge-rail-fields">
             <label>
-              <span>Категория</span>
+              <span>{t("ai.category")}</span>
               <span className="knowledge-select">
                 <select value={categoryId} onChange={(event) => setCategoryId(event.target.value)}>
                   {catalog.categories.map((item) => (
@@ -452,16 +446,16 @@ export function KnowledgeEditorPage({
               </span>
             </label>
             <label>
-              <span>Краткое описание <small>· помогает поиску и агенту</small></span>
+              <span>{t("ai.short_description")}<small>{t("ai.helps_search_agent")}</small></span>
               <textarea value={description} onChange={(event) => setDescription(event.target.value)} />
             </label>
             <div className="knowledge-rail-toggle">
               <span>
-                <strong>Участвует в ответах</strong>
-                <small>можно выключить, не удаляя</small>
+                <strong>{t("ai.used_replies")}</strong>
+                <small>{t("ai.can_switched_off_without_deleting")}</small>
               </span>
               <button
-                aria-label="Участвует в ответах"
+                aria-label={t("ai.used_replies")}
                 aria-pressed={isEnabled}
                 className={`knowledge-switch${isEnabled ? " is-on" : ""}`}
                 disabled={!canManage}
@@ -475,8 +469,8 @@ export function KnowledgeEditorPage({
 
           <div className="knowledge-rail-block">
             <div className="knowledge-rail-head">
-              <span>ВЛОЖЕНИЯ</span>
-              <button type="button" onClick={() => fileInputRef.current?.click()}>Загрузить</button>
+              <span>{t("ai.attachments")}</span>
+              <button type="button" onClick={() => fileInputRef.current?.click()}>{t("common.upload")}</button>
             </div>
             <input
               ref={fileInputRef}
@@ -500,8 +494,8 @@ export function KnowledgeEditorPage({
               }}
             >
               <Icon name="upload" size={20} strokeWidth={1.8} />
-              <p>Перетащите файлы</p>
-              <p>или <button type="button" onClick={() => fileInputRef.current?.click()}>выберите на диске</button> · до 25 МБ</p>
+              <p>{t("ai.drag_files_here")}</p>
+              <p>{t("ai.or")}<button type="button" onClick={() => fileInputRef.current?.click()}>{t("ai.pick_them_from_disk")}</button>{t("ai.up_25_mb")}</p>
             </div>
 
             <div className="knowledge-rail-files">
@@ -510,7 +504,7 @@ export function KnowledgeEditorPage({
                   <i><Icon name="file" size={14} strokeWidth={1.8} /></i>
                   <span>
                     <strong>{uploading.name}</strong>
-                    <small className="is-progress">загружаем… {uploading.percent} %</small>
+                    <small className="is-progress">{t("common.uploading_percent", { percent: uploading.percent })}</small>
                     <span className="knowledge-rail-progress"><i style={{ width: `${uploading.percent}%` }} /></span>
                   </span>
                 </div>
@@ -520,11 +514,11 @@ export function KnowledgeEditorPage({
                   <i><Icon name="file" size={14} strokeWidth={1.8} /></i>
                   <span>
                     <strong>{file.name}</strong>
-                    <small className="is-progress">приложится после сохранения</small>
+                    <small className="is-progress">{t("ai.will_attached_after_saving")}</small>
                   </span>
                   <button
                     className="knowledge-rail-file-remove"
-                    title="Убрать файл"
+                    title={t("common.remove_file")}
                     type="button"
                     onClick={() => setQueued((current) => current.filter((item) => item !== file))}
                   >
@@ -544,7 +538,7 @@ export function KnowledgeEditorPage({
                     {!inserted && (
                       <button
                         className="knowledge-rail-file-insert"
-                        title="Вставить ссылку в текст"
+                        title={t("ai.insert_link_into_text")}
                         type="button"
                         onClick={() => insertText(`\n${attachmentMarkdown(attachment)}\n`)}
                       >
@@ -552,14 +546,14 @@ export function KnowledgeEditorPage({
                       </button>
                     )}
                     <button
-                      title="Копировать Markdown"
+                      title={t("ai.copy_as_markdown")}
                       type="button"
                       onClick={() => void navigator.clipboard?.writeText(attachmentMarkdown(attachment))}
                     >
                       <Icon name="copy" size={13} strokeWidth={1.9} />
                     </button>
                     {canManage && (
-                      <button className="knowledge-rail-file-remove" title="Удалить вложение" type="button" onClick={() => void removeAttachment(attachment)}>
+                      <button className="knowledge-rail-file-remove" title={t("ai.delete_attachment")} type="button" onClick={() => void removeAttachment(attachment)}>
                         <Icon name="trash" size={13} strokeWidth={1.9} />
                       </button>
                     )}
@@ -571,8 +565,8 @@ export function KnowledgeEditorPage({
 
           <div className="knowledge-rail-block">
             <div className="knowledge-rail-head">
-              <span>АГЕНТЫ</span>
-              <small>меняется массовым действием</small>
+              <span>{t("common.agents_2")}</span>
+              <small>{t("ai.changed_by_bulk_action")}</small>
             </div>
             <div className="knowledge-rail-agents is-compact">
               {attached.map(({ agent, meta }) => (
@@ -584,21 +578,19 @@ export function KnowledgeEditorPage({
                   </span>
                 </div>
               ))}
-              {attached.length === 0 && <p className="knowledge-rail-empty">Пока ни одного агента.</p>}
+              {attached.length === 0 && <p className="knowledge-rail-empty">{t("ai.no_agents_yet")}</p>}
             </div>
             <p className="knowledge-rail-note">
-              Прикрепление и открепление — только через «Прикрепить к агенту»: операция атомарна и
-              пишется в журнал.
+              {t("ai.attach_detach_note")}
             </p>
             {loaded && canManage && (
               <button
                 className="knowledge-reindex-button"
                 disabled={busy}
                 type="button"
-                onClick={() => void reindexKnowledge(loaded.id).then(load).catch(() => setError("Не удалось переиндексировать знание"))}
+                onClick={() => void reindexKnowledge(loaded.id).then(load).catch(() => setError(t("ai.could_not_reindex_knowledge_item")))}
               >
-                <Icon name="undo" size={13} strokeWidth={1.9} />Переиндексировать
-              </button>
+                <Icon name="undo" size={13} strokeWidth={1.9} />{t("ai.reindex")}</button>
             )}
           </div>
         </aside>
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeImportPage.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeImportPage.tsx
index 22747af..d6c929b 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeImportPage.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeImportPage.tsx
@@ -3,7 +3,6 @@ import { useEffect, useMemo, useRef, useState } from "react";
 import { Icon } from "../../../shared/icons";
 import { LoadingState } from "../../../shared/ui";
 import { Button } from "../../../shared/ui-controls";
-import { pluralRu } from "../../../shared/utils";
 import type { RouteKey } from "../../../types";
 import { downloadKnowledgeTemplate } from "./downloadKnowledgeTemplate";
 import { parseKnowledgeYaml, type ParsedKnowledgeYaml } from "./parseKnowledgeYaml";
@@ -15,6 +14,8 @@ import {
   type KnowledgeImportReport,
   type KnowledgeItem,
 } from "./model";
+import { t, tn } from "../../../i18n";
+import { readableSize } from "../../../shared/utils";
 
 // Импорт YAML (дизайн-базлайн v2, кадр KB8): файл разбирается до применения —
 // видно, что создастся, что обновится и где ошибка пути. Импорт не создаёт
@@ -30,9 +31,9 @@ type ImportRow = {
 };
 
 const ACTION_LABEL: Record<ImportAction, string> = {
-  create: "создать",
-  update: "обновить",
-  error: "ошибка",
+  create: t("ai.create"),
+  update: t("ai.update"),
+  error: t("ai.error"),
 };
 
 /** Разрешает путь категории в дерево организации: путь ищется по уровням. */
@@ -63,17 +64,17 @@ function planRows(
           document,
           action: "error",
           path: document.categoryPath.join(" / "),
-          note: `категории «${missing}» нет — импорт не создаёт категории. Создайте её или уберите последний уровень пути.`,
+          note: t("ai.missing_category_path", { name: missing }),
         };
       }
     }
-    const path = document.categoryPath ? document.categoryPath.join(" / ") : "не указана";
+    const path = document.categoryPath ? document.categoryPath.join(" / ") : t("ai.not_given");
     if (!existing) {
       return {
         document,
         action: "create",
         path,
-        note: document.categoryPath ? "" : "попадёт в «Без категории»",
+        note: document.categoryPath ? "" : t("ai.will_land_no_category"),
       };
     }
     const samePlace = document.categoryPath
@@ -83,20 +84,12 @@ function planRows(
       action: "update",
       path,
       note: samePlace
-        ? "категория в файле совпадает с текущей"
-        : "совпал заголовок — заменим текст и пересоберём фрагменты",
+        ? t("ai.category_file_matches_current_one")
+        : t("ai.title_matched_text_will_replaced"),
     };
   });
 }
 
-/** «42 КБ» — размер выбранного файла в карточке. */
-function fileSize(size: number): string {
-  const kilobytes = size / 1024;
-  return kilobytes >= 1024
-    ? `${(kilobytes / 1024).toLocaleString("ru-RU", { maximumFractionDigits: 1 })} МБ`
-    : `${Math.max(1, Math.round(kilobytes)).toLocaleString("ru-RU")} КБ`;
-}
-
 export function KnowledgeImportPage({
   canManage,
   setRoute,
@@ -120,7 +113,7 @@ export function KnowledgeImportPage({
         setCategories(categoryPayload.items);
         setItems(itemPayload.items);
       })
-      .catch(() => setError("Не удалось загрузить категории и знания"))
+      .catch(() => setError(t("ai.could_not_load_categories_knowledge")))
       .finally(() => setLoading(false));
   }, []);
 
@@ -143,7 +136,7 @@ export function KnowledgeImportPage({
       setParsed(parseKnowledgeYaml(await selected.text()));
     } catch (caught) {
       setParsed(null);
-      setError(caught instanceof Error ? caught.message : "Не удалось прочитать файл");
+      setError(caught instanceof Error ? caught.message : t("ai.could_not_read_file"));
     }
   }
 
@@ -156,7 +149,7 @@ export function KnowledgeImportPage({
       setParsed(null);
       setFile(null);
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось импортировать");
+      setError(caught instanceof Error ? caught.message : t("ai.could_not_import"));
     } finally {
       setBusy(false);
     }
@@ -166,11 +159,11 @@ export function KnowledgeImportPage({
     <section className="knowledge-card">
       <div className="knowledge-card-head is-plain">
         <nav className="knowledge-breadcrumbs">
-          <button className="link is-strong" type="button" onClick={() => setRoute("knowledge")}>База знаний</button>
-          <span><span className="knowledge-crumb-sep">/</span><b>Импорт YAML</b></span>
+          <button className="link is-strong" type="button" onClick={() => setRoute("knowledge")}>{t("common.knowledge_base")}</button>
+          <span><span className="knowledge-crumb-sep">/</span><b>{t("ai.yaml_import")}</b></span>
         </nav>
-        <h2>Импорт материалов</h2>
-        <p>Файл разбирается до применения: видно, что создастся, что обновится и где ошибка.</p>
+        <h2>{t("ai.material_import")}</h2>
+        <p>{t("ai.file_parsed_before_anything_applied")}</p>
       </div>
 
       <div className="knowledge-plain-body">
@@ -190,21 +183,20 @@ export function KnowledgeImportPage({
           <div className="knowledge-import-file">
             <i><Icon name="file" size={19} strokeWidth={1.8} /></i>
             <span>
-              <strong>{file ? file.name : "Файл не выбран"}</strong>
+              <strong>{file ? file.name : t("ai.no_file_selected")}</strong>
               <small>
                 {file && parsed
-                  ? `${fileSize(file.size)} · ${pluralRu(parsed.documents.length, ["документ", "документа", "документов"])} · разобран без ошибок формата`
+                  ? t("ai.file_parsed_ok", { size: readableSize(file.size), count: tn("plural.documents", parsed.documents.length) })
                   : file
-                    ? `${fileSize(file.size)} · файл не разобран`
-                    : "YAML вида documents: [{ title, description?, content, categoryPath? }]"}
+                    ? t("ai.file_not_parsed", { size: readableSize(file.size) })
+                    : t("ai.yaml_shaped_as_documents_title")}
               </small>
             </span>
             <button type="button" onClick={() => fileInputRef.current?.click()}>
-              {file ? "Выбрать другой файл" : "Выбрать файл"}
+              {file ? t("ai.pick_another_file") : t("ai.pick_file")}
             </button>
             <button className="knowledge-import-template" type="button" onClick={downloadKnowledgeTemplate}>
-              <Icon name="download" size={14} strokeWidth={1.9} />Шаблон
-            </button>
+              <Icon name="download" size={14} strokeWidth={1.9} />{t("ai.template")}</button>
           </div>
 
           {error && <div className="knowledge-form-error">{error}</div>}
@@ -213,9 +205,8 @@ export function KnowledgeImportPage({
 
           {report && (
             <div className="knowledge-import-report">
-              <strong>Импорт завершён</strong>
-              <span>
-                Создано: <b>{report.created}</b> · Обновлено: <b>{report.updated}</b> · Без изменений: <b>{report.unchanged}</b>
+              <strong>{t("ai.import_finished")}</strong>
+              <span>{t("ai.created")}<b>{report.created}</b>{t("ai.updated")}<b>{report.updated}</b>{t("ai.unchanged")}<b>{report.unchanged}</b>
               </span>
               {report.failed.length > 0 && (
                 <ul>
@@ -230,20 +221,20 @@ export function KnowledgeImportPage({
           {parsed && (
             <div className="knowledge-import-plan">
               <div className="knowledge-import-plan-head">
-                <strong>Что произойдёт</strong>
+                <strong>{t("ai.what_will_happen")}</strong>
                 <span>
-                  {counts.create > 0 && <small className="is-create">создать {counts.create}</small>}
-                  {counts.update > 0 && <small className="is-update">обновить {counts.update}</small>}
-                  {counts.error > 0 && <small className="is-error">ошибка {counts.error}</small>}
+                  {counts.create > 0 && <small className="is-create">{t("ai.count_create", { count: counts.create })}</small>}
+                  {counts.update > 0 && <small className="is-update">{t("ai.count_update", { count: counts.update })}</small>}
+                  {counts.error > 0 && <small className="is-error">{t("ai.count_error", { count: counts.error })}</small>}
                 </span>
               </div>
               <table className="knowledge-import-table">
                 <thead>
                   <tr>
-                    <th>ДОКУМЕНТ</th>
+                    <th>{t("ai.document")}</th>
                     <th>CATEGORYPATH</th>
-                    <th>ДЕЙСТВИЕ</th>
-                    <th>ЗАМЕЧАНИЕ</th>
+                    <th>{t("ai.action")}</th>
+                    <th>{t("ai.note")}</th>
                   </tr>
                 </thead>
                 <tbody>
@@ -262,14 +253,12 @@ export function KnowledgeImportPage({
 
           {parsed && (
             <div className="knowledge-import-actions">
-              <span>
-                Импорт не создаёт категории неявно: документ с несуществующим <code>categoryPath</code>{" "}
-                отклоняется отдельно, остальные применяются. Без указания пути документ попадает в
-                «Без категории».
+              <span>{t("ai.import_never_creates_categories_implicitly")}<code>categoryPath</code>{" "}
+                {t("ai.import_path_tail")}
               </span>
-              <Button variant="secondary" disabled={busy} onClick={() => setRoute("knowledge")}>Отмена</Button>
+              <Button variant="secondary" disabled={busy} onClick={() => setRoute("knowledge")}>{t("common.cancel")}</Button>
               <Button variant="primary" disabled={busy || !canManage || importable.length === 0} onClick={() => void submit()}>
-                Импортировать {pluralRu(importable.length, ["документ", "документа", "документов"])}
+                {t("ai.import_documents", { count: tn("plural.documents", importable.length) })}
               </Button>
             </div>
           )}
diff --git a/apps/internal-ui/src/features/ai/knowledge/KnowledgeLibraryPage.tsx b/apps/internal-ui/src/features/ai/knowledge/KnowledgeLibraryPage.tsx
index 8f6bb04..66cdbe3 100644
--- a/apps/internal-ui/src/features/ai/knowledge/KnowledgeLibraryPage.tsx
+++ b/apps/internal-ui/src/features/ai/knowledge/KnowledgeLibraryPage.tsx
@@ -7,7 +7,6 @@ import { DecisionDialog } from "../../../shared/DecisionDialog";
 import { Icon } from "../../../shared/icons";
 import { LoadingState } from "../../../shared/ui";
 import { Button, FilterDropdown, SearchInput } from "../../../shared/ui-controls";
-import { pluralRu } from "../../../shared/utils";
 import type { RouteKey, SessionUser } from "../../../types";
 import type { AgentRef } from "../../agents/model";
 import { KnowledgeAgentDialog } from "./KnowledgeAgentDialog";
@@ -30,16 +29,16 @@ import {
   type KnowledgeItem,
 } from "./model";
 import { useKnowledgeLibrary } from "./useKnowledgeLibrary";
+import { t, tn } from "../../../i18n";
 
 // Библиотека знаний (дизайн-базлайн v2, кадры KB1, KB2, KB3, KB9): шапка с
 // состоянием индекса, дерево категорий 260px, таблица материалов. Панель
 // массовых операций живёт, пока живо выделение.
 
-const KNOWLEDGE_FORMS: [string, string, string] = ["знание", "знания", "знаний"];
 
 const ANSWER_FILTER = [
-  { value: "true", label: "Включено" },
-  { value: "false", label: "Выключено" },
+  { value: "true", label: t("common.on") },
+  { value: "false", label: t("common.off") },
 ];
 
 export function KnowledgeLibraryPage({
@@ -80,10 +79,10 @@ export function KnowledgeLibraryPage({
     || agentFilter.length > 0;
 
   const scopeNote = selected.length > 0
-    ? `выбрано ${selected.length} из ${library.total}`
+    ? t("common.selected_of", { selected: selected.length, total: library.total })
     : activeCategory
-      ? `категория «${activeCategory.name}»`
-      : "показаны все категории";
+      ? t("ai.category_named", { name: activeCategory.name })
+      : t("ai.all_categories_shown");
 
   async function run(action: () => Promise<unknown>, fallback: string) {
     setBusy(true);
@@ -101,7 +100,7 @@ export function KnowledgeLibraryPage({
   async function attachToAgent(agentId: number, action: "attach" | "detach") {
     await run(
       () => linkKnowledgeToAgent({ agentId, action, knowledgeIds: selected }),
-      "Не удалось изменить знания агента",
+      t("ai.could_not_change_agent_s"),
     );
     setAttachOpen(false);
     library.clearSelected();
@@ -110,7 +109,7 @@ export function KnowledgeLibraryPage({
   async function moveSelected(categoryId: number) {
     await run(
       () => bulkMoveKnowledge({ knowledgeIds: selected, categoryId }),
-      "Не удалось переместить знания",
+      t("ai.could_not_move_knowledge_items"),
     );
     setMovingOpen(false);
     library.clearSelected();
@@ -119,7 +118,7 @@ export function KnowledgeLibraryPage({
   async function setEnabled(ids: number[], isEnabled: boolean) {
     await run(
       async () => { for (const id of ids) await updateKnowledgeItem(id, { isEnabled }); },
-      "Не удалось изменить участие в ответах",
+      t("ai.could_not_change_participation_replies"),
     );
     library.clearSelected();
   }
@@ -132,37 +131,31 @@ export function KnowledgeLibraryPage({
         <div className="knowledge-card-head-row">
           <div className="knowledge-card-identity">
             <div className="knowledge-card-title">
-              <h2>База знаний</h2>
-              <span className="knowledge-index-pill"><i />Индекс актуален</span>
+              <h2>{t("common.knowledge_base")}</h2>
+              <span className="knowledge-index-pill"><i />{t("ai.index_up_date")}</span>
               <span>{stats}</span>
             </div>
             <p>
-              Материалы для AI-агентов: регламенты, прайсы, скрипты. Агент отвечает только по
-              включённым знаниям, которые к нему прикреплены. Клиент их не видит — публичное
-              живёт в порталах.
+              {t("ai.library_lead")}
             </p>
           </div>
           <div className="knowledge-card-actions">
             {canManage && (
-              <Button variant="secondary" className="knowledge-secondary-action" icon="import" onClick={() => setRoute("knowledgeImport")}>
-                Импорт YAML
-              </Button>
+              <Button variant="secondary" className="knowledge-secondary-action" icon="import" onClick={() => setRoute("knowledgeImport")}>{t("ai.yaml_import")}</Button>
             )}
             {canManage && (
-              <Button variant="primary" className="knowledge-primary-action" icon="plus" onClick={() => openKnowledgeEditor(null)}>
-                Добавить знание
-              </Button>
+              <Button variant="primary" className="knowledge-primary-action" icon="plus" onClick={() => openKnowledgeEditor(null)}>{t("ai.add_knowledge_item")}</Button>
             )}
             <Dropdown
               menu={{ items: [
-                { key: "categories", label: <button type="button" onClick={() => setRoute("knowledgeCategories")}><Icon name="folder" size={15} strokeWidth={1.9} />Категории</button> },
-                { key: "import", label: <button type="button" onClick={() => setRoute("knowledgeImport")}><Icon name="import" size={15} strokeWidth={1.9} />Импорт YAML</button> },
+                { key: "categories", label: <button type="button" onClick={() => setRoute("knowledgeCategories")}><Icon name="folder" size={15} strokeWidth={1.9} />{t("common.categories")}</button> },
+                { key: "import", label: <button type="button" onClick={() => setRoute("knowledgeImport")}><Icon name="import" size={15} strokeWidth={1.9} />{t("ai.yaml_import")}</button> },
               ] }}
               overlayClassName="app-dropdown is-knowledge-menu"
               placement="bottomRight"
               trigger={["click"]}
             >
-              <button aria-label="Ещё" className="knowledge-more-button" title="Ещё" type="button">
+              <button aria-label={t("common.more")} className="knowledge-more-button" title={t("common.more")} type="button">
                 <Icon name="more" size={16} strokeWidth={2} />
               </button>
             </Dropdown>
@@ -175,8 +168,8 @@ export function KnowledgeLibraryPage({
       <div className="knowledge-library">
         <aside className="knowledge-sections">
           <header>
-            <span>КАТЕГОРИИ</span>
-            {canManage && <button type="button" onClick={() => setRoute("knowledgeCategories")}>Управлять</button>}
+            <span>{t("ai.categories")}</span>
+            {canManage && <button type="button" onClick={() => setRoute("knowledgeCategories")}>{t("ai.manage")}</button>}
           </header>
           <nav>
             <button
@@ -186,7 +179,7 @@ export function KnowledgeLibraryPage({
               onClick={() => library.updateFilter("category", undefined)}
             >
               <Icon name="folder" size={15} strokeWidth={1.8} />
-              <span>Все знания</span>
+              <span>{t("ai.all_knowledge")}</span>
               <small>{library.categories.filter((item) => item.parentId === null).reduce((total, item) => total + (item.knowledgeCount ?? 0), 0)}</small>
             </button>
             {rows.map(({ category, depth, count }) => (
@@ -205,8 +198,7 @@ export function KnowledgeLibraryPage({
           {canManage && (
             <div className="knowledge-sections-foot">
               <button type="button" onClick={() => setRoute("knowledgeCategories")}>
-                <Icon name="plus" size={14} strokeWidth={2} />Добавить категорию
-              </button>
+                <Icon name="plus" size={14} strokeWidth={2} />{t("ai.add_category")}</button>
             </div>
           )}
         </aside>
@@ -216,13 +208,13 @@ export function KnowledgeLibraryPage({
             <div className="knowledge-library-toolbar">
               <SearchInput
                 className="knowledge-library-search"
-                placeholder="Поиск по заголовку и описанию"
+                placeholder={t("ai.search_by_title_description")}
                 value={library.filters.search}
                 onChange={(value) => library.updateFilter("search", value)}
               />
               <FilterDropdown
-                caption="В ответах:"
-                label={library.filters.isEnabled === undefined ? "Все" : library.filters.isEnabled ? "Включено" : "Выключено"}
+                caption={t("ai.replies")}
+                label={library.filters.isEnabled === undefined ? t("common.all") : library.filters.isEnabled ? t("common.on") : t("common.off")}
                 open={answerOpen}
                 options={ANSWER_FILTER}
                 selected={library.filters.isEnabled === undefined ? [] : [String(library.filters.isEnabled)]}
@@ -232,8 +224,8 @@ export function KnowledgeLibraryPage({
                 }}
               />
               <FilterDropdown
-                caption="Агент:"
-                label={agentFilter.length === 1 ? agents.find((agent) => agent.aiAgentId === agentFilter[0])?.name ?? "Любой" : "Любой"}
+                caption={t("ai.agent_2")}
+                label={agentFilter.length === 1 ? agents.find((agent) => agent.aiAgentId === agentFilter[0])?.name ?? t("ai.any") : t("ai.any")}
                 multiple
                 open={agentOpen}
                 options={agents.filter((agent) => agent.aiAgentId != null).map((agent) => ({ value: String(agent.aiAgentId), label: agent.name }))}
@@ -258,18 +250,18 @@ export function KnowledgeLibraryPage({
                   <span className="knowledge-empty-icon"><Icon name="book" size={25} strokeWidth={1.7} /></span>
                   <h3>
                     {activeCategory && !filtersActive
-                      ? `В категории «${activeCategory.name}» пока нет знаний`
-                      : filtersActive ? "Под фильтры ничего не подошло" : "Знаний пока нет"}
+                      ? t("ai.category_has_no_items", { name: activeCategory.name })
+                      : filtersActive ? t("admin.nothing_matched_filters") : t("ai.no_knowledge_yet")}
                   </h3>
                   <p>
                     {filtersActive
-                      ? "Снимите фильтры или измените запрос — материалы могли остаться в других категориях."
-                      : "Добавьте материал вручную или загрузите пачкой из YAML. Пустую категорию без вложенных можно удалить в «Управлять»."}
+                      ? t("ai.clear_filters_or_change_query")
+                      : t("ai.add_material_by_hand_or")}
                   </p>
                   {canManage && !filtersActive && (
                     <div className="knowledge-empty-actions">
-                      <Button variant="primary" onClick={() => openKnowledgeEditor(null)}>Добавить знание</Button>
-                      <Button variant="secondary" onClick={() => setRoute("knowledgeImport")}>Импорт YAML</Button>
+                      <Button variant="primary" onClick={() => openKnowledgeEditor(null)}>{t("ai.add_knowledge_item")}</Button>
+                      <Button variant="secondary" onClick={() => setRoute("knowledgeImport")}>{t("ai.yaml_import")}</Button>
                     </div>
                   )}
                 </div>
@@ -282,7 +274,7 @@ export function KnowledgeLibraryPage({
                       <th className="knowledge-check-cell">
                         {canManage && (
                           <button
-                            aria-label="Выбрать все знания на странице"
+                            aria-label={t("ai.select_every_knowledge_item_page")}
                             className={`knowledge-check${allVisibleChecked ? " is-checked" : ""}`}
                             type="button"
                             onClick={library.toggleVisible}
@@ -291,12 +283,12 @@ export function KnowledgeLibraryPage({
                           </button>
                         )}
                       </th>
-                      <th>ЗНАНИЕ</th>
-                      <th>КАТЕГОРИЯ</th>
-                      <th>ФРАГМЕНТЫ</th>
-                      <th>АГЕНТЫ</th>
-                      <th>В ОТВЕТАХ</th>
-                      <th>ОБНОВЛЕНО</th>
+                      <th>{t("ai.knowledge_item")}</th>
+                      <th>{t("common.category")}</th>
+                      <th>{t("ai.chunks")}</th>
+                      <th>{t("common.agents_2")}</th>
+                      <th>{t("ai.replies_2")}</th>
+                      <th>{t("ai.updated_2")}</th>
                       <th />
                     </tr>
                   </thead>
@@ -308,16 +300,16 @@ export function KnowledgeLibraryPage({
                       // Сколько агентов используют материал — считает сервер.
                       const attachedAgents = item.agentsCount ?? 0;
                       const menuItems = [
-                        { key: "open", label: <button type="button" onClick={() => openKnowledge(item.id)}><Icon name="book" size={15} strokeWidth={1.8} />Открыть знание</button> },
+                        { key: "open", label: <button type="button" onClick={() => openKnowledge(item.id)}><Icon name="book" size={15} strokeWidth={1.8} />{t("ai.open_knowledge_item")}</button> },
                         ...(canManage ? [
-                          { key: "edit", label: <button type="button" onClick={() => openKnowledgeEditor(item.id)}><Icon name="edit" size={15} strokeWidth={1.9} />Редактировать</button> },
+                          { key: "edit", label: <button type="button" onClick={() => openKnowledgeEditor(item.id)}><Icon name="edit" size={15} strokeWidth={1.9} />{t("common.edit_item")}</button> },
                           { key: "divider-1", type: "divider" as const },
-                          { key: "agent", label: <button type="button" onClick={() => { library.selectOnly(item.id); setAttachOpen(true); }}><Icon name="robot" size={15} strokeWidth={1.8} />Прикрепить к агенту</button> },
-                          { key: "move", label: <button type="button" onClick={() => { library.selectOnly(item.id); setMovingOpen(true); }}><Icon name="move" size={15} strokeWidth={1.9} />Переместить в категорию</button> },
-                          { key: "answers", label: <button type="button" onClick={() => void setEnabled([item.id], !item.isEnabled)}><Icon name={item.isEnabled ? "eyeOff" : "eye"} size={15} strokeWidth={1.9} />{item.isEnabled ? "Выключить в ответах" : "Включить в ответах"}</button> },
-                          { key: "reindex", label: <button type="button" onClick={() => void run(() => reindexKnowledge(item.id), "Не удалось переиндексировать знание")}><Icon name="undo" size={15} strokeWidth={1.9} />Переиндексировать</button> },
+                          { key: "agent", label: <button type="button" onClick={() => { library.selectOnly(item.id); setAttachOpen(true); }}><Icon name="robot" size={15} strokeWidth={1.8} />{t("ai.attach_agent")}</button> },
+                          { key: "move", label: <button type="button" onClick={() => { library.selectOnly(item.id); setMovingOpen(true); }}><Icon name="move" size={15} strokeWidth={1.9} />{t("ai.move_category")}</button> },
+                          { key: "answers", label: <button type="button" onClick={() => void setEnabled([item.id], !item.isEnabled)}><Icon name={item.isEnabled ? "eyeOff" : "eye"} size={15} strokeWidth={1.9} />{item.isEnabled ? t("ai.switch_off_replies") : t("ai.switch_replies")}</button> },
+                          { key: "reindex", label: <button type="button" onClick={() => void run(() => reindexKnowledge(item.id), t("ai.could_not_reindex_knowledge_item"))}><Icon name="undo" size={15} strokeWidth={1.9} />{t("ai.reindex")}</button> },
                           { key: "divider-2", type: "divider" as const },
-                          { key: "delete", label: <button className="danger" type="button" onClick={() => setDeleting({ ids: [item.id], text: `«${item.title}» и его вложения будут удалены. У агентов, которым знание прикреплено, оно исчезнет из ответов.` })}><Icon name="trash" size={15} strokeWidth={1.9} />Удалить знание</button> },
+                          { key: "delete", label: <button className="danger" type="button" onClick={() => setDeleting({ ids: [item.id], text: t("ai.item_and_files_deleted", { title: item.title }) })}><Icon name="trash" size={15} strokeWidth={1.9} />{t("ai.delete_knowledge_item")}</button> },
                         ] : []),
                       ];
                       return (
@@ -329,7 +321,7 @@ export function KnowledgeLibraryPage({
                           <td className="knowledge-check-cell" onClick={(event) => event.stopPropagation()}>
                             {canManage && (
                               <button
-                                aria-label={`Выбрать «${item.title}»`}
+                                aria-label={t("ai.select_item", { title: item.title })}
                                 className={`knowledge-check${checked ? " is-checked" : ""}`}
                                 type="button"
                                 onClick={() => library.toggleSelected(item.id)}
@@ -346,7 +338,7 @@ export function KnowledgeLibraryPage({
                                 <small>{item.description}</small>
                               </span>
                               {item.attachments.length > 0 && (
-                                <small className="knowledge-name-files" title="Вложения">
+                                <small className="knowledge-name-files" title={t("ai.attachments_2")}>
                                   <Icon name="attach" size={12} strokeWidth={1.9} />{item.attachments.length}
                                 </small>
                               )}
@@ -360,7 +352,7 @@ export function KnowledgeLibraryPage({
                           <td>
                             {attachedAgents > 0
                               ? <span className="knowledge-agents-tag"><Icon name="robot" size={12} strokeWidth={1.8} />{attachedAgents}</span>
-                              : <small className="knowledge-agents-empty">не прикреплено</small>}
+                              : <small className="knowledge-agents-empty">{t("ai.not_attached")}</small>}
                           </td>
                           <td>
                             <span className={`knowledge-answer-pill${item.isEnabled ? " is-on" : ""}`}><i />{answerStateLabel(item)}</span>
@@ -371,7 +363,7 @@ export function KnowledgeLibraryPage({
                           </td>
                           <td className="row-actions" onClick={(event) => event.stopPropagation()}>
                             <Dropdown menu={{ items: menuItems }} overlayClassName="app-dropdown is-knowledge-menu" placement="bottomRight" trigger={["click"]}>
-                              <button aria-label={`Действия: ${item.title}`} className="row-menu-button" type="button"><Icon name="more" size={16} strokeWidth={2} /></button>
+                              <button aria-label={t("common.actions_for", { name: item.title })} className="row-menu-button" type="button"><Icon name="more" size={16} strokeWidth={2} /></button>
                             </Dropdown>
                           </td>
                         </tr>
@@ -381,7 +373,7 @@ export function KnowledgeLibraryPage({
                 </table>
 
                 <Pagination
-                  note={`${pluralRu(library.total, KNOWLEDGE_FORMS)} · показаны ${library.items.length} · агент отвечает только по включённым и прикреплённым`}
+                  note={t("ai.library_note", { count: tn("plural.knowledge", library.total), shown: library.items.length })}
                   page={library.page}
                   pageCount={library.pageCount}
                   onPage={library.setPage}
@@ -403,7 +395,7 @@ export function KnowledgeLibraryPage({
           onMove={() => setMovingOpen(true)}
           onRemove={() => setDeleting({
             ids: selected,
-            text: `${pluralRu(selected.length, KNOWLEDGE_FORMS)} и их вложения будут удалены. У агентов, которым они прикреплены, материалы исчезнут из ответов.`,
+            text: t("ai.items_and_files_deleted", { count: tn("plural.knowledge", selected.length) }),
           })}
         />
       )}
@@ -433,10 +425,10 @@ export function KnowledgeLibraryPage({
         onClose={() => setDeleting(null)}
         tone="danger"
         icon="trash"
-        title={deleting && deleting.ids.length > 1 ? "Удалить выбранные знания?" : "Удалить знание?"}
+        title={deleting && deleting.ids.length > 1 ? t("ai.delete_selected_knowledge_items") : t("ai.delete_knowledge_item_2")}
         description={deleting?.text ?? ""}
         actions={<>
-          <Button variant="secondary" onClick={() => setDeleting(null)}>Отмена</Button>
+          <Button variant="secondary" onClick={() => setDeleting(null)}>{t("common.cancel")}</Button>
           <Button
             variant="danger-outline"
             disabled={busy}
@@ -446,12 +438,10 @@ export function KnowledgeLibraryPage({
               if (!target) return;
               void run(
                 async () => { for (const id of target.ids) await deleteKnowledgeItem(id); },
-                "Не удалось удалить знание",
+                t("ai.could_not_delete_knowledge_item"),
               ).then(() => library.clearSelected());
             }}
-          >
-            Удалить
-          </Button>
+          >{t("common.delete")}</Button>
         </>}
       />
     </section>
diff --git a/apps/internal-ui/src/features/ai/knowledge/downloadKnowledgeTemplate.ts b/apps/internal-ui/src/features/ai/knowledge/downloadKnowledgeTemplate.ts
index a37a70a..2c5ccb7 100644
--- a/apps/internal-ui/src/features/ai/knowledge/downloadKnowledgeTemplate.ts
+++ b/apps/internal-ui/src/features/ai/knowledge/downloadKnowledgeTemplate.ts
@@ -1,20 +1,29 @@
+import { t } from "../../../i18n";
+
 // Каркас YAML-файла для импорта знаний (формат parseKnowledgeYaml):
 // documents: [{ title, description?, content }]. description необязателен —
 // шаблон показывает оба варианта.
-const KNOWLEDGE_TEMPLATE = `documents:
-  - title: "Название знания"
-    description: "Короткое описание (необязательно)"
+//
+// Ключи YAML — часть формата и не переводятся: их читает парсер. Переводится
+// только то, что человек увидит и заменит своим, — примеры заголовков и текста.
+// Шаблон собирается функцией, а не константой: константа посчиталась бы при
+// импорте модуля, ещё до того, как стал известен язык.
+function knowledgeTemplate(): string {
+  return `documents:
+  - title: "${t("ai.template_title")}"
+    description: "${t("ai.template_description")}"
     content: |
-      Основной текст знания.
+      ${t("ai.template_content")}
 
-  - title: "Название знания без описания"
+  - title: "${t("ai.template_title_no_description")}"
     content: |
-      Основной текст знания.
+      ${t("ai.template_content")}
 `;
+}
 
 export function downloadKnowledgeTemplate(): void {
   const url = URL.createObjectURL(
-    new Blob([`\uFEFF${KNOWLEDGE_TEMPLATE}`], { type: "text/yaml;charset=utf-8" }),
+    new Blob([`\uFEFF${knowledgeTemplate()}`], { type: "text/yaml;charset=utf-8" }),
   );
   const link = document.createElement("a");
   link.href = url;
diff --git a/apps/internal-ui/src/features/ai/knowledge/knowledgeLibraryModel.ts b/apps/internal-ui/src/features/ai/knowledge/knowledgeLibraryModel.ts
index 1615b0e..90951f1 100644
--- a/apps/internal-ui/src/features/ai/knowledge/knowledgeLibraryModel.ts
+++ b/apps/internal-ui/src/features/ai/knowledge/knowledgeLibraryModel.ts
@@ -1,5 +1,6 @@
-import { pluralRu, shortDateTime } from "../../../shared/utils";
+import { readableSize, shortDateTime } from "../../../shared/utils";
 import type { KnowledgeAgentRef, KnowledgeAttachment, KnowledgeCategory, KnowledgeItem } from "./types";
+import { t, tn } from "../../../i18n";
 
 // Экранная модель раздела «База знаний» (дизайн-базлайн v2, кадры KB1–KB9).
 // Отделы упразднены ADR-CHATBALLS-0041, поэтому доступность знания — это флаг
@@ -52,11 +53,11 @@ export function libraryTotals(categories: KnowledgeCategory[], items: KnowledgeI
     .filter((category) => category.parentId === null)
     .reduce((total, category) => total + (category.knowledgeCount ?? 0), 0);
   const fragments = items.reduce((total, item) => total + (item.fragmentsCount ?? 0), 0);
-  const fragmentsText = pluralRu(fragments, ["фрагмент", "фрагмента", "фрагментов"])
+  const fragmentsText = tn("plural.chunks", fragments)
     .replace(String(fragments), fragments.toLocaleString("ru-RU"));
   return [
-    pluralRu(categories.length, ["категория", "категории", "категорий"]),
-    pluralRu(knowledge, ["знание", "знания", "знаний"]),
+    tn("plural.categories", categories.length),
+    tn("plural.knowledge", knowledge),
     fragmentsText,
   ].join(" · ");
 }
@@ -75,7 +76,7 @@ export type AgentState = {
 export function agentStates(agents: KnowledgeAgentRef[]): AgentState[] {
   return agents.map((agent) => ({
     agent,
-    meta: agent.aiStatus === "ACTIVE" ? "AI отвечает" : "AI выключен у агента",
+    meta: agent.aiStatus === "ACTIVE" ? t("conversations.ai_replying") : t("ai.ai_off_agent"),
     answering: agent.aiStatus === "ACTIVE",
   }));
 }
@@ -87,17 +88,14 @@ export function knowledgeUpdatedAt(item: KnowledgeItem): string {
 
 /** Подпись состояния знания в ответах агента (колонка «В ОТВЕТАХ»). */
 export function answerStateLabel(item: KnowledgeItem): string {
-  return item.isEnabled ? "Включено" : "Выключено";
+  return item.isEnabled ? t("common.on") : t("common.off");
 }
 
 /** «PDF · 1,1 МБ · ссылка в тексте» — подпись вложения (кадры KB4/KB5). */
 export function attachmentMeta(attachment: KnowledgeAttachment, content = ""): string {
   const extension = (attachment.name.split(".").pop() ?? "").toLocaleUpperCase();
-  const kilobytes = attachment.size / 1024;
-  const size = kilobytes >= 1024
-    ? `${(kilobytes / 1024).toLocaleString("ru-RU", { maximumFractionDigits: 1 })} МБ`
-    : `${Math.max(1, Math.round(kilobytes)).toLocaleString("ru-RU")} КБ`;
-  const linked = content.includes(attachment.url) ? " · ссылка в тексте" : "";
+  const size = readableSize(attachment.size);
+  const linked = content.includes(attachment.url) ? t("ai.link_text") : "";
   return `${extension ? `${extension} · ` : ""}${size}${linked}`;
 }
 
@@ -135,5 +133,5 @@ export function knowledgeChunks(content: string, maxChars = 800): string[] {
 /** «4 280 знаков · ≈12 фрагментов» — статусная строка редактора (кадр KB5). */
 export function knowledgeEditorStats(content: string): string {
   const characters = content.length.toLocaleString("ru-RU");
-  return `${characters} знаков · ≈${pluralRu(knowledgeChunks(content).length, ["фрагмент", "фрагмента", "фрагментов"])}`;
+  return t("ai.characters_and_chunks", { characters, chunks: tn("plural.chunks", knowledgeChunks(content).length) });
 }
diff --git a/apps/internal-ui/src/features/ai/knowledge/model.ts b/apps/internal-ui/src/features/ai/knowledge/model.ts
index a74f3eb..4d8cfc7 100644
--- a/apps/internal-ui/src/features/ai/knowledge/model.ts
+++ b/apps/internal-ui/src/features/ai/knowledge/model.ts
@@ -1,8 +1,11 @@
+import { readableSize } from "../../../shared/utils";
+import { t } from "../../../i18n";
+
 export * from "./api";
 export type * from "./types";
 
 export function formatSize(bytes: number): string {
-  if (bytes < 1024) return `${bytes} Б`;
-  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} КБ`;
-  return `${(bytes / (1024 * 1024)).toFixed(1)} МБ`;
+  // Байты показываются только у совсем маленьких вложений: ниже килобайта
+  // «1 КБ» врало бы заметнее, чем помогало.
+  return bytes < 1024 ? t("unit.b", { value: bytes }) : readableSize(bytes);
 }
diff --git a/apps/internal-ui/src/features/ai/knowledge/parseKnowledgeYaml.ts b/apps/internal-ui/src/features/ai/knowledge/parseKnowledgeYaml.ts
index 102aae8..12a6168 100644
--- a/apps/internal-ui/src/features/ai/knowledge/parseKnowledgeYaml.ts
+++ b/apps/internal-ui/src/features/ai/knowledge/parseKnowledgeYaml.ts
@@ -1,4 +1,5 @@
 import { load as parseYaml } from "js-yaml";
+import { t } from "../../../i18n";
 
 export type ParsedKnowledgeYaml = {
   documents: Array<{ title: string; description?: string; content: string; categoryPath?: string[] }>;
@@ -14,28 +15,28 @@ export function parseKnowledgeYaml(text: string): ParsedKnowledgeYaml {
   try {
     data = parseYaml(text);
   } catch (error) {
-    throw new Error(error instanceof Error ? `Невалидный YAML: ${error.message}` : "Невалидный YAML");
+    throw new Error(error instanceof Error ? t("ai.invalid_yaml_reason", { reason: error.message }) : t("ai.invalid_yaml"));
   }
   if (!data || typeof data !== "object") {
-    throw new Error("Ожидается объект верхнего уровня с ключом documents");
+    throw new Error(t("ai.top_level_object_with_documents"));
   }
   const root = data as { documents?: unknown };
   if (!Array.isArray(root.documents) || root.documents.length === 0) {
-    throw new Error("documents должен быть непустым списком");
+    throw new Error(t("ai.documents_must_non_empty_list"));
   }
   const documents: ParsedKnowledgeYaml["documents"] = [];
   root.documents.forEach((item, index) => {
     if (!item || typeof item !== "object") {
-      throw new Error(`Документ #${index + 1}: должен быть объектом`);
+      throw new Error(t("ai.document_must_be_object", { index: index + 1 }));
     }
     const record = item as Record<string, unknown>;
     const title = record.title === undefined || record.title === null ? "" : String(record.title).trim();
     if (!title) {
-      throw new Error(`Документ #${index + 1}: обязательное поле «title» пустое`);
+      throw new Error(t("ai.document_title_empty", { index: index + 1 }));
     }
     const content = record.content === undefined || record.content === null ? "" : String(record.content);
     if (!content.trim()) {
-      throw new Error(`Документ #${index + 1}: обязательное поле «content» пустое`);
+      throw new Error(t("ai.document_content_empty", { index: index + 1 }));
     }
     const doc: ParsedKnowledgeYaml["documents"][number] = { title, content };
     if (record.description !== undefined && record.description !== null && String(record.description).trim()) {
@@ -43,11 +44,11 @@ export function parseKnowledgeYaml(text: string): ParsedKnowledgeYaml {
     }
     if (record.categoryPath !== undefined && record.categoryPath !== null) {
       if (!Array.isArray(record.categoryPath) || record.categoryPath.length === 0) {
-        throw new Error(`Документ #${index + 1}: «categoryPath» должен быть непустым списком`);
+        throw new Error(t("ai.document_category_path_list", { index: index + 1 }));
       }
       const path = record.categoryPath.map((name) => String(name).trim());
       if (path.some((name) => !name)) {
-        throw new Error(`Документ #${index + 1}: в «categoryPath» есть пустой уровень`);
+        throw new Error(t("ai.document_category_path_empty_level", { index: index + 1 }));
       }
       doc.categoryPath = path;
     }
diff --git a/apps/internal-ui/src/features/ai/knowledge/useKnowledgeLibrary.ts b/apps/internal-ui/src/features/ai/knowledge/useKnowledgeLibrary.ts
index 2b182ed..ca10939 100644
--- a/apps/internal-ui/src/features/ai/knowledge/useKnowledgeLibrary.ts
+++ b/apps/internal-ui/src/features/ai/knowledge/useKnowledgeLibrary.ts
@@ -7,6 +7,7 @@ import {
   fetchKnowledgeList,
   type KnowledgeCategory,
 } from "./model";
+import { t } from "../../../i18n";
 
 // Библиотека знаний: страница, ветка категорий, агент, состояние и поиск —
 // всё на сервере. Раньше ветку и агента отбирал браузер по всему набору,
@@ -53,7 +54,7 @@ export function useKnowledgeLibrary() {
     [filters.agents, filters.category, filters.isEnabled, settledSearch],
   );
   const load = useCallback((page: number) => fetchKnowledgeList(request, page), [request]);
-  const page = usePagedResource(load, request, "Не удалось загрузить знания");
+  const page = usePagedResource(load, request, t("ai.could_not_load_knowledge"));
 
   useEffect(() => {
     void reloadCategories();
diff --git a/apps/internal-ui/src/features/auth/AuthChangePassword.tsx b/apps/internal-ui/src/features/auth/AuthChangePassword.tsx
index 76806d4..d36c652 100644
--- a/apps/internal-ui/src/features/auth/AuthChangePassword.tsx
+++ b/apps/internal-ui/src/features/auth/AuthChangePassword.tsx
@@ -7,6 +7,7 @@ import { Button } from "../../shared/ui-controls";
 import { AuthField } from "./AuthField";
 import { AuthFrame } from "./AuthFrame";
 import { passwordIsValid, passwordLabels, passwordScore } from "./password";
+import { t } from "../../i18n";
 
 export function AuthChangePassword({ onChanged }: { user: SessionUser; onChanged: (user: AuthenticatedUser) => void }) {
   const [password, setPassword] = useState("");
@@ -29,32 +30,32 @@ export function AuthChangePassword({ onChanged }: { user: SessionUser; onChanged
       });
       onChanged(payload.user);
     } catch (requestError) {
-      setError(requestError instanceof Error ? requestError.message : "Не удалось сохранить пароль");
+      setError(requestError instanceof Error ? requestError.message : t("admin.could_not_save_password"));
     } finally {
       setSubmitting(false);
     }
   }
 
   return (
-    <AuthFrame title="Смена временного пароля" subtitle="Вы вошли по временному паролю. Задайте постоянный пароль, чтобы продолжить." logo="shield" width={420}>
+    <AuthFrame title={t("admin.change_temporary_password")} subtitle={t("admin.signed_with_temporary_password_set")} logo="shield" width={420}>
       <form className="auth-card" onSubmit={submit}>
         {error && <div className="auth-error"><span className="auth-error-dot">!</span><span>{error}</span></div>}
-        <label className="field-label">Новый пароль</label>
-        <AuthField icon="lock" value={password} onChange={setPassword} placeholder="Минимум 10 символов" type="password" />
+        <label className="field-label">{t("common.new_password")}</label>
+        <AuthField icon="lock" value={password} onChange={setPassword} placeholder={t("common.at_least_10_characters")} type="password" />
         <div className={`password-strength score-${score}`}>
           <div>{[0, 1, 2, 3].map((item) => <span className={item < score ? "active" : ""} key={item} />)}</div>
           <p>{passwordLabels[score]}</p>
         </div>
-        <label className="field-label">Повторите пароль</label>
-        <AuthField icon="lock" value={confirm} onChange={setConfirm} placeholder="Повторите новый пароль" type="password" error={mismatch} />
-        {mismatch && <div className="auth-inline-error">Пароли не совпадают</div>}
+        <label className="field-label">{t("admin.repeat_password")}</label>
+        <AuthField icon="lock" value={confirm} onChange={setConfirm} placeholder={t("common.repeat_new_password")} type="password" error={mismatch} />
+        {mismatch && <div className="auth-inline-error">{t("common.passwords_do_not_match")}</div>}
         <div className="password-requirements">
-          <strong>ТРЕБОВАНИЯ К ПАРОЛЮ</strong>
-          <span className={password.length >= 10 ? "done" : ""}>Не менее 10 символов</span>
-          <span className={/\d/.test(password) ? "done" : ""}>Содержит цифру</span>
-          <span className={/[A-Za-zА-Яа-я]/.test(password) && /[^A-Za-zА-Яа-я0-9]/.test(password) ? "done" : ""}>Буквы и спецсимвол</span>
+          <strong>{t("common.password_requirements")}</strong>
+          <span className={password.length >= 10 ? "done" : ""}>{t("common.at_least_10_characters_long")}</span>
+          <span className={/\d/.test(password) ? "done" : ""}>{t("common.contains_digit")}</span>
+          <span className={/[A-Za-zА-Яа-я]/.test(password) && /[^A-Za-zА-Яа-я0-9]/.test(password) ? "done" : ""}>{t("common.letters_special_character")}</span>
         </div>
-        <Button className="auth-submit" type="submit" variant="primary" disabled={!valid || submitting}>Сохранить и войти</Button>
+        <Button className="auth-submit" type="submit" variant="primary" disabled={!valid || submitting}>{t("admin.save_sign")}</Button>
       </form>
     </AuthFrame>
   );
diff --git a/apps/internal-ui/src/features/auth/AuthCodeInput.tsx b/apps/internal-ui/src/features/auth/AuthCodeInput.tsx
index 0f66dfd..5930691 100644
--- a/apps/internal-ui/src/features/auth/AuthCodeInput.tsx
+++ b/apps/internal-ui/src/features/auth/AuthCodeInput.tsx
@@ -1,3 +1,5 @@
+import { t } from "../../i18n";
+
 export function AuthCodeInput({ value, onChange, error = false, autoFocus = false }: { value: string; onChange: (value: string) => void; error?: boolean; autoFocus?: boolean }) {
   const activeIndex = Math.min(value.length, 5);
   const digits = value.padEnd(6, " ").slice(0, 6).split("");
@@ -17,7 +19,7 @@ export function AuthCodeInput({ value, onChange, error = false, autoFocus = fals
         inputMode="numeric"
         maxLength={6}
         autoFocus={autoFocus}
-        aria-label="Код из приложения-аутентификатора"
+        aria-label={t("admin.code_from_authenticator_app")}
       />
     </div>
   );
diff --git a/apps/internal-ui/src/features/auth/AuthLogin.tsx b/apps/internal-ui/src/features/auth/AuthLogin.tsx
index 4139771..43ecb70 100644
--- a/apps/internal-ui/src/features/auth/AuthLogin.tsx
+++ b/apps/internal-ui/src/features/auth/AuthLogin.tsx
@@ -6,6 +6,7 @@ import { Icon } from "../../shared/icons";
 import { Button } from "../../shared/ui-controls";
 import { AuthField } from "./AuthField";
 import { AuthFrame } from "./AuthFrame";
+import { t } from "../../i18n";
 
 export function AuthLogin({ onLogin, onTotpChallenge, onRecover }: { onLogin: (user: AuthenticatedUser) => void; onTotpChallenge: (challenge: AuthChallenge) => void; onRecover: () => void }) {
   const [email, setEmail] = useState("");
@@ -36,21 +37,21 @@ export function AuthLogin({ onLogin, onTotpChallenge, onRecover }: { onLogin: (u
   }
 
   return (
-    <AuthFrame title="Chatballs" subtitle="Рады вас видеть!" logo="pulse" note="Защищённое соединение">
+    <AuthFrame title="Chatballs" subtitle={t("admin.good_see")} logo="pulse" note={t("admin.secure_connection")}>
       <form className="auth-card" onSubmit={submit}>
-        {error && <div className="auth-error"><span className="auth-error-dot">!</span><span>Неверный email или пароль. Проверьте данные и попробуйте снова.</span></div>}
+        {error && <div className="auth-error"><span className="auth-error-dot">!</span><span>{t("admin.wrong_email_or_password_check")}</span></div>}
         <label className="field-label">Email</label>
         <AuthField icon="mail" value={email} onChange={(nextEmail) => { setEmail(nextEmail); setError(false); }} placeholder="you@domain.ru" error={error} />
         <div className="password-row">
-          <label className="field-label">Пароль</label>
-          <button className="link" type="button" onClick={onRecover}>Восстановить доступ</button>
+          <label className="field-label">{t("common.password")}</label>
+          <button className="link" type="button" onClick={onRecover}>{t("admin.recover_access")}</button>
         </div>
-        <AuthField icon="lock" value={password} onChange={(nextPassword) => { setPassword(nextPassword); setError(false); }} placeholder="Пароль" type={show ? "text" : "password"} variant="auth-password" error={error}>
-          <button type="button" onClick={() => setShow((value) => !value)} aria-label={show ? "Скрыть пароль" : "Показать пароль"}>
+        <AuthField icon="lock" value={password} onChange={(nextPassword) => { setPassword(nextPassword); setError(false); }} placeholder={t("common.password")} type={show ? "text" : "password"} variant="auth-password" error={error}>
+          <button type="button" onClick={() => setShow((value) => !value)} aria-label={show ? t("admin.hide_password") : t("admin.show_password")}>
             <Icon name={show ? "eyeOff" : "eye"} size={17} />
           </button>
         </AuthField>
-        <Button className="auth-submit" icon="arrow" iconSize={16} type="submit" variant="primary" disabled={submitting}>Войти</Button>
+        <Button className="auth-submit" icon="arrow" iconSize={16} type="submit" variant="primary" disabled={submitting}>{t("admin.sign")}</Button>
       </form>
     </AuthFrame>
   );
diff --git a/apps/internal-ui/src/features/auth/AuthPasswordRecovery.tsx b/apps/internal-ui/src/features/auth/AuthPasswordRecovery.tsx
index 744f71a..fe1c63a 100644
--- a/apps/internal-ui/src/features/auth/AuthPasswordRecovery.tsx
+++ b/apps/internal-ui/src/features/auth/AuthPasswordRecovery.tsx
@@ -5,6 +5,7 @@ import { Icon } from "../../shared/icons";
 import { Button } from "../../shared/ui-controls";
 import { AuthField } from "./AuthField";
 import { AuthFrame } from "./AuthFrame";
+import { t } from "../../i18n";
 
 const RESEND_COOLDOWN = 30;
 const EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
@@ -71,39 +72,38 @@ export function AuthPasswordRecovery({ onBackToLogin }: { onBackToLogin: () => v
 
   const backLink = (
     <button type="button" className="auth-back-login" onClick={onBackToLogin}>
-      <Icon name="arrow" size={14} />Вернуться ко входу
-    </button>
+      <Icon name="arrow" size={14} />{t("common.back_sign")}</button>
   );
 
   if (step === "sent") {
     return (
-      <AuthFrame title="Письмо отправлено" subtitle="Перейдите по ссылке из письма, чтобы задать новый пароль." logo="pulse" note={backLink}>
+      <AuthFrame title={t("admin.email_sent")} subtitle={t("admin.follow_link_email_set_new")} logo="pulse" note={backLink}>
         <div className="auth-card">
           <div className="auth-recovery-sent">
             <div className="auth-recovery-sent-icon"><Icon name="mail" size={26} /></div>
-            <h3>Проверьте почту</h3>
-            <p>Если <b>{sentEmail}</b> зарегистрирован в Chatballs, на него отправлено письмо со ссылкой для сброса пароля.</p>
+            <h3>{t("admin.check_email")}</h3>
+            <p>{t("admin.if")}<b>{sentEmail}</b>{t("admin.registered_with_chatballs_email_with")}</p>
           </div>
           <div className="auth-recovery-info">
             <Icon name="clock" size={15} />
-            <span>Письмо не пришло за пару минут? Проверьте «Спам» или повторите запрос — ссылка действует 30 минут.</span>
+            <span>{t("admin.no_email_after_couple_minutes")}</span>
           </div>
           <Button className="auth-submit" variant="primary" onClick={resend} disabled={cooldown > 0 || submitting}>
-            {cooldown > 0 ? `Отправить повторно через ${cooldown} с` : "Отправить письмо ещё раз"}
+            {cooldown > 0 ? t("time.resend_in", { seconds: cooldown }) : t("admin.send_email_again")}
           </Button>
-          <Button className="auth-recovery-secondary" variant="secondary" onClick={changeAddress}>Изменить адрес</Button>
+          <Button className="auth-recovery-secondary" variant="secondary" onClick={changeAddress}>{t("admin.change_address")}</Button>
         </div>
       </AuthFrame>
     );
   }
 
   return (
-    <AuthFrame title="Восстановление доступа" subtitle="Укажите рабочий email — пришлём ссылку для создания нового пароля." logo="pulse" note={backLink}>
+    <AuthFrame title={t("admin.access_recovery")} subtitle={t("admin.enter_work_email_we_will")} logo="pulse" note={backLink}>
       <form className="auth-card" onSubmit={submit}>
-        <label className="field-label">Рабочий email</label>
+        <label className="field-label">{t("admin.work_email_2")}</label>
         <AuthField icon="mail" value={email} onChange={setEmail} placeholder="you@domain.ru" />
-        <p className="auth-recovery-hint">Если адрес зарегистрирован, отправим ссылку для сброса пароля. Ссылка действует 30 минут.</p>
-        <Button className="auth-submit" icon="arrow" iconSize={16} type="submit" variant="primary" disabled={!valid || submitting}>Отправить ссылку</Button>
+        <p className="auth-recovery-hint">{t("admin.if_address_registered_we_will")}</p>
+        <Button className="auth-submit" icon="arrow" iconSize={16} type="submit" variant="primary" disabled={!valid || submitting}>{t("admin.send_link")}</Button>
       </form>
     </AuthFrame>
   );
diff --git a/apps/internal-ui/src/features/auth/AuthResetPassword.tsx b/apps/internal-ui/src/features/auth/AuthResetPassword.tsx
index cfe5a70..aff1c12 100644
--- a/apps/internal-ui/src/features/auth/AuthResetPassword.tsx
+++ b/apps/internal-ui/src/features/auth/AuthResetPassword.tsx
@@ -6,6 +6,7 @@ import { Button } from "../../shared/ui-controls";
 import { AuthField } from "./AuthField";
 import { AuthFrame } from "./AuthFrame";
 import { passwordIsValid, passwordLabels, passwordScore } from "./password";
+import { t } from "../../i18n";
 
 type Status = "checking" | "form" | "invalid" | "done";
 
@@ -45,34 +46,34 @@ export function AuthResetPassword({ onDone }: { onDone: () => void }) {
       await api("/api/v1/auth/password-reset/confirm/", { method: "POST", body: JSON.stringify({ uid, token, newPassword: password }) });
       setStatus("done");
     } catch (requestError) {
-      setError(requestError instanceof Error ? requestError.message : "Не удалось сохранить пароль");
+      setError(requestError instanceof Error ? requestError.message : t("admin.could_not_save_password"));
     } finally {
       setSubmitting(false);
     }
   }
 
   const backLink = (
-    <button type="button" className="auth-back-login" onClick={onDone}><Icon name="arrow" size={14} />Вернуться ко входу</button>
+    <button type="button" className="auth-back-login" onClick={onDone}><Icon name="arrow" size={14} />{t("common.back_sign")}</button>
   );
 
   if (status === "checking") {
     return (
-      <AuthFrame title="Проверяем ссылку" subtitle="Подождите немного." logo="shield">
-        <div className="auth-card"><p className="auth-hint">Проверяем ссылку для сброса пароля…</p></div>
+      <AuthFrame title={t("admin.checking_link")} subtitle={t("admin.one_moment")} logo="shield">
+        <div className="auth-card"><p className="auth-hint">{t("admin.checking_password_reset_link")}</p></div>
       </AuthFrame>
     );
   }
 
   if (status === "invalid") {
     return (
-      <AuthFrame title="Ссылка недействительна" subtitle="Срок действия ссылки истёк или она уже использована." logo="shield" note={backLink}>
+      <AuthFrame title={t("admin.link_not_valid")} subtitle={t("admin.link_has_expired_or_has")} logo="shield" note={backLink}>
         <div className="auth-card">
           <div className="auth-recovery-sent">
             <div className="auth-recovery-sent-icon warning"><Icon name="warning" size={26} /></div>
-            <h3>Ссылка не подходит</h3>
-            <p>Ссылка действует 30 минут и только один раз. Запросите восстановление доступа ещё раз.</p>
+            <h3>{t("admin.link_does_not_work")}</h3>
+            <p>{t("admin.link_valid_30_minutes_one")}</p>
           </div>
-          <Button className="auth-submit" variant="primary" onClick={onDone}>Вернуться ко входу</Button>
+          <Button className="auth-submit" variant="primary" onClick={onDone}>{t("common.back_sign")}</Button>
         </div>
       </AuthFrame>
     );
@@ -80,39 +81,39 @@ export function AuthResetPassword({ onDone }: { onDone: () => void }) {
 
   if (status === "done") {
     return (
-      <AuthFrame title="Пароль обновлён" subtitle="Теперь можно войти с новым паролем." logo="shield">
+      <AuthFrame title={t("profile.password_updated")} subtitle={t("admin.can_now_sign_with_new")} logo="shield">
         <div className="auth-card">
           <div className="auth-recovery-sent">
             <div className="auth-recovery-sent-icon success"><Icon name="check" size={26} /></div>
-            <h3>Готово</h3>
-            <p>Пароль успешно изменён. Войдите в Chatballs, используя новый пароль.</p>
+            <h3>{t("common.done")}</h3>
+            <p>{t("admin.password_was_changed_sign_chatballs")}</p>
           </div>
-          <Button className="auth-submit" variant="primary" onClick={onDone}>Войти</Button>
+          <Button className="auth-submit" variant="primary" onClick={onDone}>{t("admin.sign")}</Button>
         </div>
       </AuthFrame>
     );
   }
 
   return (
-    <AuthFrame title="Новый пароль" subtitle="Задайте новый пароль для входа в Chatballs." logo="shield" width={420} note={backLink}>
+    <AuthFrame title={t("common.new_password")} subtitle={t("admin.set_new_password_sign_chatballs")} logo="shield" width={420} note={backLink}>
       <form className="auth-card" onSubmit={submit}>
         {error && <div className="auth-error"><span className="auth-error-dot">!</span><span>{error}</span></div>}
-        <label className="field-label">Новый пароль</label>
-        <AuthField icon="lock" value={password} onChange={setPassword} placeholder="Минимум 10 символов" type="password" />
+        <label className="field-label">{t("common.new_password")}</label>
+        <AuthField icon="lock" value={password} onChange={setPassword} placeholder={t("common.at_least_10_characters")} type="password" />
         <div className={`password-strength score-${score}`}>
           <div>{[0, 1, 2, 3].map((item) => <span className={item < score ? "active" : ""} key={item} />)}</div>
           <p>{passwordLabels[score]}</p>
         </div>
-        <label className="field-label">Повторите пароль</label>
-        <AuthField icon="lock" value={confirm} onChange={setConfirm} placeholder="Повторите новый пароль" type="password" error={mismatch} />
-        {mismatch && <div className="auth-inline-error">Пароли не совпадают</div>}
+        <label className="field-label">{t("admin.repeat_password")}</label>
+        <AuthField icon="lock" value={confirm} onChange={setConfirm} placeholder={t("common.repeat_new_password")} type="password" error={mismatch} />
+        {mismatch && <div className="auth-inline-error">{t("common.passwords_do_not_match")}</div>}
         <div className="password-requirements">
-          <strong>ТРЕБОВАНИЯ К ПАРОЛЮ</strong>
-          <span className={password.length >= 10 ? "done" : ""}>Не менее 10 символов</span>
-          <span className={/\d/.test(password) ? "done" : ""}>Содержит цифру</span>
-          <span className={/[A-Za-zА-Яа-я]/.test(password) && /[^A-Za-zА-Яа-я0-9]/.test(password) ? "done" : ""}>Буквы и спецсимвол</span>
+          <strong>{t("common.password_requirements")}</strong>
+          <span className={password.length >= 10 ? "done" : ""}>{t("common.at_least_10_characters_long")}</span>
+          <span className={/\d/.test(password) ? "done" : ""}>{t("common.contains_digit")}</span>
+          <span className={/[A-Za-zА-Яа-я]/.test(password) && /[^A-Za-zА-Яа-я0-9]/.test(password) ? "done" : ""}>{t("common.letters_special_character")}</span>
         </div>
-        <Button className="auth-submit" type="submit" variant="primary" disabled={!valid || submitting}>Сохранить и войти</Button>
+        <Button className="auth-submit" type="submit" variant="primary" disabled={!valid || submitting}>{t("admin.save_sign")}</Button>
       </form>
     </AuthFrame>
   );
diff --git a/apps/internal-ui/src/features/auth/AuthSetup.tsx b/apps/internal-ui/src/features/auth/AuthSetup.tsx
index 17a8226..8d7454e 100644
--- a/apps/internal-ui/src/features/auth/AuthSetup.tsx
+++ b/apps/internal-ui/src/features/auth/AuthSetup.tsx
@@ -7,6 +7,7 @@ import { Button } from "../../shared/ui-controls";
 import { AuthField } from "./AuthField";
 import { AuthFrame } from "./AuthFrame";
 import { passwordIsValid, passwordLabels, passwordScore } from "./password";
+import { t } from "../../i18n";
 
 type SetupErrors = Partial<Record<"organizationName" | "fullName" | "email" | "password", string>>;
 
@@ -45,7 +46,7 @@ export function AuthSetup({ onDone }: { onDone: (user: AuthenticatedUser) => voi
         if (fieldErrors) setErrors(fieldErrors);
         setError(requestError.message);
       } else {
-        setError("Не удалось создать организацию");
+        setError(t("admin.could_not_create_organization"));
       }
     } finally {
       setSubmitting(false);
@@ -53,18 +54,18 @@ export function AuthSetup({ onDone }: { onDone: (user: AuthenticatedUser) => voi
   }
 
   return (
-    <AuthFrame title="Chatballs" subtitle="Первый запуск: создайте организацию и учётную запись владельца" logo="pulse" width={420}>
+    <AuthFrame title="Chatballs" subtitle={t("admin.first_run_create_organization_owner")} logo="pulse" width={420}>
       <form className="auth-card" onSubmit={submit}>
         {error && <div className="auth-error"><span className="auth-error-dot">!</span><span>{error}</span></div>}
-        <label className="field-label">Название организации</label>
-        <AuthField icon="building" value={organizationName} onChange={setOrganizationName} placeholder="Ателье Норд" error={Boolean(errors.organizationName)} />
-        <label className="field-label">Ваше имя</label>
-        <AuthField icon="user" value={fullName} onChange={setFullName} placeholder="Елена Кузнецова" error={Boolean(errors.fullName)} />
+        <label className="field-label">{t("admin.organization_name")}</label>
+        <AuthField icon="building" value={organizationName} onChange={setOrganizationName} placeholder={t("admin.nord_atelier")} error={Boolean(errors.organizationName)} />
+        <label className="field-label">{t("admin.name")}</label>
+        <AuthField icon="user" value={fullName} onChange={setFullName} placeholder={t("admin.elena_kuznetsova")} error={Boolean(errors.fullName)} />
         <label className="field-label">Email</label>
         <AuthField icon="mail" value={email} onChange={setEmail} placeholder="you@domain.ru" error={Boolean(errors.email)} />
-        <label className="field-label">Пароль</label>
-        <AuthField icon="lock" value={password} onChange={setPassword} placeholder="Минимум 10 символов" type={show ? "text" : "password"} error={Boolean(errors.password)}>
-          <button type="button" onClick={() => setShow((value) => !value)} aria-label={show ? "Скрыть пароль" : "Показать пароль"}>
+        <label className="field-label">{t("common.password")}</label>
+        <AuthField icon="lock" value={password} onChange={setPassword} placeholder={t("common.at_least_10_characters")} type={show ? "text" : "password"} error={Boolean(errors.password)}>
+          <button type="button" onClick={() => setShow((value) => !value)} aria-label={show ? t("admin.hide_password") : t("admin.show_password")}>
             <Icon name={show ? "eyeOff" : "eye"} size={17} />
           </button>
         </AuthField>
@@ -73,19 +74,19 @@ export function AuthSetup({ onDone }: { onDone: (user: AuthenticatedUser) => voi
           <p>{passwordLabels[score]}</p>
         </div>
         <div className="password-requirements">
-          <strong>ТРЕБОВАНИЯ К ПАРОЛЮ</strong>
-          <span className={password.length >= 10 ? "done" : ""}>Не менее 10 символов</span>
-          <span className={/\d/.test(password) ? "done" : ""}>Содержит цифру</span>
-          <span className={/[A-Za-zА-Яа-я]/.test(password) && /[^A-Za-zА-Яа-я0-9]/.test(password) ? "done" : ""}>Буквы и спецсимвол</span>
+          <strong>{t("common.password_requirements")}</strong>
+          <span className={password.length >= 10 ? "done" : ""}>{t("common.at_least_10_characters_long")}</span>
+          <span className={/\d/.test(password) ? "done" : ""}>{t("common.contains_digit")}</span>
+          <span className={/[A-Za-zА-Яа-я]/.test(password) && /[^A-Za-zА-Яа-я0-9]/.test(password) ? "done" : ""}>{t("common.letters_special_character")}</span>
         </div>
         <label className="auth-checkbox">
           <input type="checkbox" checked={installDemo} onChange={(event) => setInstallDemo(event.target.checked)} />
           <span>
-            <strong>Установить демо-данные</strong>
-            <small>Сотрудники, агенты, диалоги и знания вымышленного ателье — посмотреть систему в работе. Удаляются в «Настройках» одной кнопкой.</small>
+            <strong>{t("admin.install_demo_data")}</strong>
+            <small>{t("admin.operators_agents_conversations_knowledge_fictional")}</small>
           </span>
         </label>
-        <Button className="auth-submit" icon="arrow" iconSize={16} type="submit" variant="primary" disabled={!valid || submitting}>Начать</Button>
+        <Button className="auth-submit" icon="arrow" iconSize={16} type="submit" variant="primary" disabled={!valid || submitting}>{t("admin.start")}</Button>
       </form>
     </AuthFrame>
   );
diff --git a/apps/internal-ui/src/features/auth/AuthTotpCode.tsx b/apps/internal-ui/src/features/auth/AuthTotpCode.tsx
index 4629cd5..f67663a 100644
--- a/apps/internal-ui/src/features/auth/AuthTotpCode.tsx
+++ b/apps/internal-ui/src/features/auth/AuthTotpCode.tsx
@@ -7,6 +7,7 @@ import { Button } from "../../shared/ui-controls";
 import { AuthCodeInput } from "./AuthCodeInput";
 import { AuthFrame } from "./AuthFrame";
 import { formatCountdown } from "./time";
+import { t } from "../../i18n";
 
 export function AuthTotpCode({ challenge, onVerified }: { challenge: AuthChallenge; onVerified: (user: AuthenticatedUser) => void }) {
   const [code, setCode] = useState("");
@@ -37,14 +38,14 @@ export function AuthTotpCode({ challenge, onVerified }: { challenge: AuthChallen
   }
 
   return (
-    <AuthFrame title="Подтверждение входа" subtitle={<>Введите 6-значный код из приложения-аутентификатора для <b>{challenge.email}</b></>} logo="shield">
+    <AuthFrame title={t("admin.sign_confirmation")} subtitle={<>{t("admin.enter_6_digit_code_from")}<b>{challenge.email}</b></>} logo="shield">
       <form className="auth-card auth-totp-code-card" onSubmit={submit}>
         <AuthCodeInput value={code} onChange={(nextCode) => { setCode(nextCode); setError(false); }} error={error} autoFocus />
-        {error && <div className="auth-error totp-code-error"><Icon name="warning" size={15} /><span>Неверный код. Осталось попыток: 2</span></div>}
-        <Button className="auth-submit" type="submit" variant="primary" disabled={code.length !== 6 || submitting}>Подтвердить</Button>
-        <div className="auth-countdown"><Icon name="clock" size={14} />Код обновится через <span>{formatCountdown(countdown)}</span></div>
+        {error && <div className="auth-error totp-code-error"><Icon name="warning" size={15} /><span>{t("admin.wrong_code_attempts_left_2")}</span></div>}
+        <Button className="auth-submit" type="submit" variant="primary" disabled={code.length !== 6 || submitting}>{t("admin.confirm")}</Button>
+        <div className="auth-countdown"><Icon name="clock" size={14} />{t("admin.code_refreshes")}<span>{formatCountdown(countdown)}</span></div>
       </form>
-      <p className="auth-support-link">Нет доступа к коду? <button className="link" type="button">Связаться с поддержкой</button></p>
+      <p className="auth-support-link">{t("admin.no_access_code")}<button className="link" type="button">{t("admin.contact_support")}</button></p>
     </AuthFrame>
   );
 }
diff --git a/apps/internal-ui/src/features/auth/AuthTotpSetup.tsx b/apps/internal-ui/src/features/auth/AuthTotpSetup.tsx
index 711bfd4..2d78ef2 100644
--- a/apps/internal-ui/src/features/auth/AuthTotpSetup.tsx
+++ b/apps/internal-ui/src/features/auth/AuthTotpSetup.tsx
@@ -7,6 +7,7 @@ import { Button } from "../../shared/ui-controls";
 import { AuthCodeInput } from "./AuthCodeInput";
 import { AuthFrame } from "./AuthFrame";
 import { TotpQr } from "./TotpQr";
+import { t } from "../../i18n";
 
 export function AuthTotpSetup({ user: _user, onConfirmed }: { user: SessionUser; onConfirmed: (user: AuthenticatedUser) => void }) {
   const [secret, setSecret] = useState("");
@@ -54,22 +55,22 @@ export function AuthTotpSetup({ user: _user, onConfirmed }: { user: SessionUser;
   }
 
   return (
-    <AuthFrame title="Подключение двухфакторной аутентификации" subtitle="Отсканируйте QR-код в приложении-аутентификаторе, затем подтвердите кодом" logo="shield" width={440}>
+    <AuthFrame title={t("admin.setting_up_two_factor_authentication")} subtitle={t("admin.scan_qr_code_authenticator_app")} logo="shield" width={440}>
       <form className="auth-card auth-totp-setup-card" onSubmit={submit}>
-        <div className="auth-totp-step"><span>1</span><strong>Отсканируйте QR-код</strong></div>
+        <div className="auth-totp-step"><span>1</span><strong>{t("admin.scan_qr_code")}</strong></div>
         <TotpQr value={otpauthUrl || secret} />
-        <p className="auth-secret-caption">Не получается отсканировать? Введите ключ вручную:</p>
+        <p className="auth-secret-caption">{t("admin.cannot_scan_enter_key_manually")}</p>
         <div className="auth-secret-row">
           <code>{secret || <LogoSpinner size={16} />}</code>
-          <button type="button" onClick={copySecret} title="Скопировать" disabled={!secret}><Icon name={copied ? "check" : "copy"} size={15} /></button>
+          <button type="button" onClick={copySecret} title={t("common.copy_clipboard")} disabled={!secret}><Icon name={copied ? "check" : "copy"} size={15} /></button>
         </div>
         <div className="auth-totp-divider" />
-        <div className="auth-totp-step second"><span>2</span><strong>Введите код из приложения</strong></div>
+        <div className="auth-totp-step second"><span>2</span><strong>{t("admin.enter_code_from_app")}</strong></div>
         <AuthCodeInput value={code} onChange={(nextCode) => { setCode(nextCode); setError(false); }} error={error} autoFocus />
-        {error && <div className="auth-inline-error setup-error"><Icon name="warning" size={14} />Код не совпал. Попробуйте ещё раз</div>}
-        <Button className="auth-submit" type="submit" variant="primary" disabled={code.length !== 6 || submitting}>Активировать</Button>
+        {error && <div className="auth-inline-error setup-error"><Icon name="warning" size={14} />{t("admin.code_did_not_match_try")}</div>}
+        <Button className="auth-submit" type="submit" variant="primary" disabled={code.length !== 6 || submitting}>{t("admin.activate")}</Button>
       </form>
-      <div className="auth-cancel-link"><button className="link is-muted" type="button">Отмена</button></div>
+      <div className="auth-cancel-link"><button className="link is-muted" type="button">{t("common.cancel")}</button></div>
     </AuthFrame>
   );
 }
diff --git a/apps/internal-ui/src/features/auth/TotpQr.tsx b/apps/internal-ui/src/features/auth/TotpQr.tsx
index e255de8..97707a8 100644
--- a/apps/internal-ui/src/features/auth/TotpQr.tsx
+++ b/apps/internal-ui/src/features/auth/TotpQr.tsx
@@ -1,10 +1,11 @@
 import { createQrMatrix } from "./qr";
+import { t } from "../../i18n";
 
 export function TotpQr({ value }: { value: string }) {
   const qr = createQrMatrix(value);
   return (
     <div className="auth-qr-shell">
-      <div className="auth-qr-grid" style={{ gridTemplateColumns: `repeat(${qr.size}, 1fr)` }} aria-label="QR-код для подключения TOTP">
+      <div className="auth-qr-grid" style={{ gridTemplateColumns: `repeat(${qr.size}, 1fr)` }} aria-label={t("admin.qr_code_setting_up_totp")}>
         {qr.modules.map((active, index) => <span className={active ? "active" : ""} key={index} />)}
       </div>
     </div>
diff --git a/apps/internal-ui/src/features/auth/password.ts b/apps/internal-ui/src/features/auth/password.ts
index e5f1874..52d3306 100644
--- a/apps/internal-ui/src/features/auth/password.ts
+++ b/apps/internal-ui/src/features/auth/password.ts
@@ -1,4 +1,6 @@
-export const passwordLabels = ["Введите новый пароль", "Слабый пароль", "Средний пароль", "Хороший пароль", "Надёжный пароль"];
+import { t } from "../../i18n";
+
+export const passwordLabels = [t("admin.enter_new_password"), t("admin.weak_password"), t("admin.fair_password"), t("admin.good_password"), t("admin.strong_password")];
 
 export function passwordScore(password: string): number {
   if (!password) return 0;
diff --git a/apps/internal-ui/src/features/chat/ChatPage.tsx b/apps/internal-ui/src/features/chat/ChatPage.tsx
index 0abe9d3..bd3fd8e 100644
--- a/apps/internal-ui/src/features/chat/ChatPage.tsx
+++ b/apps/internal-ui/src/features/chat/ChatPage.tsx
@@ -10,6 +10,7 @@ import type { ConversationListItem } from "../conversations/types";
 import { ClientContext } from "../sales/dialogs/context/ClientContext";
 import { HistoryContext } from "../sales/dialogs/context/HistoryContext";
 import type { EmployeeGroupRef, RouteKey, SessionUser } from "../../types";
+import { t } from "../../i18n";
 
 // Единый «Чат» (дизайн-базлайн v2 §8.1): один экран для всех диалогов
 // организации. Контекст-панель сама выбирает представление по источнику
@@ -55,7 +56,7 @@ export function ChatPage({
       showScopeSwitcher={showScopeSwitcher}
       mobileHeader={({ total }) => <ChatMobileHeader user={user} scope={scope} total={total} setRoute={setRoute} onLogout={onLogout} onOpenMenu={onOpenMenu} />}
       hint={showScopeSwitcher
-        ? <Hint id="chat-visibility">Вы видите все диалоги организации. Сотрудники видят только диалоги своих групп, без группы и те, где они ответственные.</Hint>
+        ? <Hint id="chat-visibility">{t("admin.see_every_conversation_organization_operators")}</Hint>
         : undefined}
       viewerId={user.id}
       renderContextPanel={({ dialog, detail, applyConversation, startCall, closeContext }) => (
@@ -99,9 +100,9 @@ function ChatContextPanel({
   return (
     <section className="sales-context">
       <div className="sales-context-tabs">
-        <RightTabButton active={rightTab === "client"} onClick={() => setRightTab("client")}>Контакт</RightTabButton>
-        <RightTabButton active={rightTab === "history"} onClick={() => setRightTab("history")}>История</RightTabButton>
-        <button className="ctx-close" type="button" aria-label="Закрыть панель" onClick={closeContext}><Icon name="xCircle" size={16} /></button>
+        <RightTabButton active={rightTab === "client"} onClick={() => setRightTab("client")}>{t("common.contact")}</RightTabButton>
+        <RightTabButton active={rightTab === "history"} onClick={() => setRightTab("history")}>{t("common.history")}</RightTabButton>
+        <button className="ctx-close" type="button" aria-label={t("admin.close_panel")} onClick={closeContext}><Icon name="xCircle" size={16} /></button>
       </div>
       <div className="sales-context-body">
         {rightTab === "client" && (
diff --git a/apps/internal-ui/src/features/conversations/AudioCallOverlay.tsx b/apps/internal-ui/src/features/conversations/AudioCallOverlay.tsx
index 215a7c8..82c1fa3 100644
--- a/apps/internal-ui/src/features/conversations/AudioCallOverlay.tsx
+++ b/apps/internal-ui/src/features/conversations/AudioCallOverlay.tsx
@@ -10,6 +10,7 @@ import { providerMeta } from "../../shared/providers";
 import { endCallByAccess, type ApiCall, type CallAccess } from "./model";
 import type { ConversationListItem } from "./types";
 import "./call.css";
+import { t } from "../../i18n";
 
 type Props = {
   open: boolean;
@@ -55,7 +56,7 @@ export function AudioCallOverlay(props: Props) {
 
   if (!props.dialog) return null;
   const channel = providerMeta[props.dialog.channel];
-  const subCaption = mode === "active" ? (rtc.micOn ? "Говорите" : "Ваш микрофон выключен") : undefined;
+  const subCaption = mode === "active" ? (rtc.micOn ? t("conversations.go_ahead") : t("conversations.microphone_off")) : undefined;
   const builtStatus = buildAudioStatus(audioStatusKey(mode, call, props.errorText, rtc.connectionPhase, rtc.mediaIssue), props.dialog.name, call?.durationSeconds ?? undefined);
   const status = props.errorText && builtStatus
     ? { ...builtStatus, caption: props.errorText }
@@ -140,11 +141,11 @@ function audioStatusKey(mode: AudioCallMode, call: ApiCall | null, errorText: st
 }
 
 function statusLabel(mode: AudioCallMode): string {
-  if (mode === "incoming") return "Входящий звонок";
-  if (mode === "ringing") return "Исходящий звонок";
-  if (mode === "active") return "Аудиозвонок";
-  if (mode === "connecting") return "Соединение";
-  if (mode === "reconnecting") return "Переподключение";
+  if (mode === "incoming") return t("conversations.incoming_call");
+  if (mode === "ringing") return t("conversations.outgoing_call");
+  if (mode === "active") return t("conversations.audio_call");
+  if (mode === "connecting") return t("conversations.connecting");
+  if (mode === "reconnecting") return t("conversations.reconnecting");
   return "";
 }
 
diff --git a/apps/internal-ui/src/features/conversations/Composer.tsx b/apps/internal-ui/src/features/conversations/Composer.tsx
index eb94197..7b8f263 100644
--- a/apps/internal-ui/src/features/conversations/Composer.tsx
+++ b/apps/internal-ui/src/features/conversations/Composer.tsx
@@ -8,6 +8,7 @@ import { formatSize } from "../ai/knowledge/model";
 import { formatDuration } from "./VoiceMessage";
 import { useVoiceRecorder } from "./useVoiceRecorder";
 import type { ChannelKey, ControlMode } from "./types";
+import { t } from "../../i18n";
 
 const MAX_FILE_BYTES = 20 * 1024 * 1024;
 
@@ -66,7 +67,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
   const voiceAvailable = recorder.supported && voiceAllowed;
 
   if (conversationId == null) {
-    return <div className="sales-composer"><div className="composer-locked"><div><strong>Выберите диалог</strong></div></div></div>;
+    return <div className="sales-composer"><div className="composer-locked"><div><strong>{t("conversations.pick_conversation")}</strong></div></div></div>;
   }
 
   if (!loaded) {
@@ -78,7 +79,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
     return (
       <div className="sales-composer"><div className="composer-locked">
         <span><Icon name="lock" size={19} /></span>
-        <div><strong>Диалог закрыт</strong><p>История сохранена. Новое обращение клиента создаст новый диалог.</p></div>
+        <div><strong>{t("conversations.conversation_closed")}</strong><p>{t("conversations.history_kept_next_time_customer")}</p></div>
       </div></div>
     );
   }
@@ -88,8 +89,8 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
     return (
       <div className="sales-composer"><div className="composer-locked">
         <span><Icon name="lock" size={19} /></span>
-        <div><strong>{assignedOperatorName ? `Диалог ведёт ${assignedOperatorName}` : "Диалог ведёт другого сотрудника"}</strong><p>Отвечать может ответственный. Возьмите диалог, чтобы продолжить самостоятельно.</p></div>
-        <button className="composer-locked-action" type="button" onClick={onClaim}>Взять диалог</button>
+        <div><strong>{assignedOperatorName ? t("conversations.handled_by", { name: assignedOperatorName }) : t("conversations.another_operator_handling_conversation")}</strong><p>{t("conversations.only_assignee_can_reply_take")}</p></div>
+        <button className="composer-locked-action" type="button" onClick={onClaim}>{t("conversations.take_conversation")}</button>
       </div></div>
     );
   }
@@ -124,7 +125,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
       setText("");
       onSent();
     } catch (error) {
-      setSendError(error instanceof Error ? error.message : "Не удалось отправить сообщение");
+      setSendError(error instanceof Error ? error.message : t("conversations.could_not_send_message"));
     } finally {
       setSending(false);
     }
@@ -133,7 +134,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
   function pickFile(file: File | null) {
     if (!file) return;
     if (file.size > MAX_FILE_BYTES) {
-      setSendError("Файл больше 20 МБ");
+      setSendError(t("conversations.file_over_20_mb"));
       return;
     }
     setSendError("");
@@ -145,16 +146,15 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
     return (
       <div className="sales-composer">
         <div className="voice-recorder">
-          <button aria-label="Отменить запись" className="voice-recorder-cancel" title="Отменить запись" type="button" onClick={recorder.cancel}>
+          <button aria-label={t("conversations.cancel_recording")} className="voice-recorder-cancel" title={t("conversations.cancel_recording")} type="button" onClick={recorder.cancel}>
             <Icon name="trash" size={16} />
           </button>
           <span className="voice-recorder-timer"><i />{formatDuration(recorder.seconds)}</span>
           <span className="voice-recorder-hint">
-            {recorder.state === "sending" ? "Отправка…" : "Идёт запись. Esc — отменить, Enter — отправить"}
+            {recorder.state === "sending" ? t("common.sending") : t("conversations.recording_esc_cancels_enter_sends")}
           </span>
           <button className="voice-recorder-send" disabled={recorder.state === "sending"} type="button" onClick={recorder.stopAndSend}>
-            <Icon name="send" size={14} />Отправить
-          </button>
+            <Icon name="send" size={14} />{t("conversations.send")}</button>
         </div>
         {recorder.errorText && <div className="sales-composer-error">{recorder.errorText}</div>}
       </div>
@@ -164,9 +164,9 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
   // Кадры A–C: композер активен всегда (решение 2) — первое сообщение
   // перехватывает диалог; над полем одна строка-предупреждение.
   const warning = mode === "ai"
-    ? { color: "var(--ai)", text: "AI ведёт диалог. Ваше сообщение перехватит его — AI перестанет отвечать" }
+    ? { color: "var(--ai)", text: t("conversations.ai_handling_conversation_message_takes") }
     : mode === "waiting"
-      ? { color: "var(--warning-text)", dot: "var(--warning)", text: "Клиент ждёт. Ваше сообщение возьмёт диалог на вас" }
+      ? { color: "var(--warning-text)", dot: "var(--warning)", text: t("conversations.customer_waiting_message_assigns_conversation") }
       : null;
 
   return (
@@ -176,7 +176,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
         <div className="composer-box">
           {menuOpen && (
             <div className="composer-templates-menu">
-              {visibleTemplates.length === 0 && <p>Нет подходящих шаблонов</p>}
+              {visibleTemplates.length === 0 && <p>{t("conversations.no_matching_templates")}</p>}
               {visibleTemplates.map((template) => (
                 <button key={template.id} type="button" onMouseDown={(event) => { event.preventDefault(); applyTemplate(template); }}>
                   <strong>{template.title}</strong>
@@ -190,7 +190,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
               <Icon name="paperclip" size={14} />
               <strong title={attachment.name}>{attachment.name}</strong>
               <small>{formatSize(attachment.size)}</small>
-              <button aria-label="Убрать файл" title="Убрать файл" type="button" disabled={sending} onClick={() => { setAttachment(null); if (fileInputRef.current) fileInputRef.current.value = ""; }}>
+              <button aria-label={t("common.remove_file")} title={t("common.remove_file")} type="button" disabled={sending} onClick={() => { setAttachment(null); if (fileInputRef.current) fileInputRef.current.value = ""; }}>
                 <Icon name="xCircle" size={15} />
               </button>
             </div>
@@ -198,7 +198,7 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
           <textarea
             ref={textareaRef}
             rows={1}
-            placeholder={attachment ? "Подпись к файлу (необязательно)…" : compact ? "Сообщение…" : "Введите сообщение… Shift+Enter — перенос строки, «/» — шаблон ответа"}
+            placeholder={attachment ? t("conversations.caption_file_optional") : compact ? t("conversations.message") : t("conversations.type_message_shift_enter_line")}
             value={text}
             onChange={(event) => setText(event.target.value)}
             onKeyDown={(event) => {
@@ -217,22 +217,21 @@ export function Composer({ mode, loaded, assignedOperatorName, conversationId, c
           />
           <div className="composer-toolbar">
             <EmojiPicker onPick={insertEmoji} disabled={sending} />
-            <button className="composer-tool" title="Прикрепить" aria-label="Прикрепить файл" type="button" disabled={sending} onClick={() => fileInputRef.current?.click()}>
+            <button className="composer-tool" title={t("common.attach")} aria-label={t("common.attach_file")} type="button" disabled={sending} onClick={() => fileInputRef.current?.click()}>
               <Icon name="paperclip" size={17} />
             </button>
             <input ref={fileInputRef} type="file" hidden onChange={(event) => { pickFile(event.target.files?.[0] ?? null); event.target.value = ""; }} />
             {voiceAvailable && (
-              <button className="composer-tool" title="Записать голосовое" aria-label="Записать голосовое" type="button" onClick={() => void recorder.start()}>
+              <button className="composer-tool" title={t("conversations.record_voice_message")} aria-label={t("conversations.record_voice_message")} type="button" onClick={() => void recorder.start()}>
                 <Icon name="mic" size={17} />
               </button>
             )}
             {templates.length > 0 && (
-              <button className="composer-tool is-labeled" title="Шаблоны ответов · /" type="button" onClick={() => setTemplatesOpen((open) => !open)}>
-                <Icon name="text" size={16} />Шаблоны
-              </button>
+              <button className="composer-tool is-labeled" title={t("conversations.reply_templates")} type="button" onClick={() => setTemplatesOpen((open) => !open)}>
+                <Icon name="text" size={16} />{t("conversations.templates")}</button>
             )}
             <span className="composer-spacer" />
-            <button className="composer-send" type="button" onClick={() => void send()} disabled={sending || (!text.trim() && !attachment)}><span>Отправить</span><kbd>⏎</kbd><Icon name="send" size={17} /></button>
+            <button className="composer-send" type="button" onClick={() => void send()} disabled={sending || (!text.trim() && !attachment)}><span>{t("conversations.send")}</span><kbd>⏎</kbd><Icon name="send" size={17} /></button>
           </div>
         </div>
       </div>
diff --git a/apps/internal-ui/src/features/conversations/ContactEditForm.tsx b/apps/internal-ui/src/features/conversations/ContactEditForm.tsx
index 19ee074..f9dd4ec 100644
--- a/apps/internal-ui/src/features/conversations/ContactEditForm.tsx
+++ b/apps/internal-ui/src/features/conversations/ContactEditForm.tsx
@@ -2,6 +2,7 @@ import { useState } from "react";
 
 import { FormField, TextAreaField } from "../../shared/form-controls";
 import { Button } from "../../shared/ui-controls";
+import { t } from "../../i18n";
 
 // Форма карточки контакта (имя, описание, телефон, компания, город) — одна
 // для контекст-панели чата и для карточки в «Контактах». Раскладки две:
@@ -11,10 +12,10 @@ import { Button } from "../../shared/ui-controls";
 export type ContactCardFields = { name: string; description: string; phone: string; company: string; city: string };
 
 const FIELDS: Array<{ key: Exclude<keyof ContactCardFields, "description">; label: string }> = [
-  { key: "name", label: "Имя" },
-  { key: "phone", label: "Телефон" },
-  { key: "company", label: "Компания" },
-  { key: "city", label: "Город" },
+  { key: "name", label: t("common.name") },
+  { key: "phone", label: t("common.phone") },
+  { key: "company", label: t("common.company") },
+  { key: "city", label: t("common.city") },
 ];
 
 export function ContactEditForm({ initial, layout = "rail", onSubmit, onCancel }: { initial: ContactCardFields; layout?: "rail" | "card"; onSubmit: (fields: ContactCardFields) => Promise<void>; onCancel: () => void }) {
@@ -26,7 +27,7 @@ export function ContactEditForm({ initial, layout = "rail", onSubmit, onCancel }
 
   async function save() {
     if (!form.name.trim()) {
-      setErrorText("Имя не может быть пустым");
+      setErrorText(t("conversations.name_cannot_empty"));
       return;
     }
     setSaving(true);
@@ -34,7 +35,7 @@ export function ContactEditForm({ initial, layout = "rail", onSubmit, onCancel }
     try {
       await onSubmit(form);
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось сохранить");
+      setErrorText(error instanceof Error ? error.message : t("common.could_not_save"));
     } finally {
       setSaving(false);
     }
@@ -52,12 +53,12 @@ export function ContactEditForm({ initial, layout = "rail", onSubmit, onCancel }
           {FIELDS.map((field) => (
             <FormField key={field.key} label={field.label} value={form[field.key]} onChange={(value) => put(field.key, value)} />
           ))}
-          <TextAreaField label="Описание" value={form.description} onChange={(value) => put("description", value)} />
+          <TextAreaField label={t("common.description")} value={form.description} onChange={(value) => put("description", value)} />
         </div>
         {errorText && <p className="contact-edit-error" role="alert">{errorText}</p>}
         <div className="contact-edit-actions">
-          <Button variant="secondary" disabled={saving} onClick={onCancel}>Отмена</Button>
-          <Button variant="primary" type="submit" disabled={saving}>{saving ? "Сохранение" : "Сохранить"}</Button>
+          <Button variant="secondary" disabled={saving} onClick={onCancel}>{t("common.cancel")}</Button>
+          <Button variant="primary" type="submit" disabled={saving}>{saving ? t("common.saving") : t("common.save")}</Button>
         </div>
       </form>
     );
@@ -65,15 +66,15 @@ export function ContactEditForm({ initial, layout = "rail", onSubmit, onCancel }
 
   return (
     <form className="ctx-contact-edit" onSubmit={submit}>
-      <input value={form.name} onChange={set("name")} placeholder="Имя" aria-label="Имя" autoFocus />
-      <textarea value={form.description} onChange={set("description")} placeholder="Описание" aria-label="Описание" rows={2} />
-      <input value={form.phone} onChange={set("phone")} placeholder="Телефон" aria-label="Телефон" />
-      <input value={form.company} onChange={set("company")} placeholder="Компания" aria-label="Компания" />
-      <input value={form.city} onChange={set("city")} placeholder="Город" aria-label="Город" />
+      <input value={form.name} onChange={set("name")} placeholder={t("common.name")} aria-label={t("common.name")} autoFocus />
+      <textarea value={form.description} onChange={set("description")} placeholder={t("common.description")} aria-label={t("common.description")} rows={2} />
+      <input value={form.phone} onChange={set("phone")} placeholder={t("common.phone")} aria-label={t("common.phone")} />
+      <input value={form.company} onChange={set("company")} placeholder={t("common.company")} aria-label={t("common.company")} />
+      <input value={form.city} onChange={set("city")} placeholder={t("common.city")} aria-label={t("common.city")} />
       {errorText && <p className="ctx-error">{errorText}</p>}
       <div className="ctx-note-actions">
-        <button type="button" onClick={onCancel} disabled={saving}>Отмена</button>
-        <button type="submit" className="primary" disabled={saving}>Сохранить</button>
+        <button type="button" onClick={onCancel} disabled={saving}>{t("common.cancel")}</button>
+        <button type="submit" className="primary" disabled={saving}>{t("common.save")}</button>
       </div>
     </form>
   );
diff --git a/apps/internal-ui/src/features/conversations/ConversationActions.tsx b/apps/internal-ui/src/features/conversations/ConversationActions.tsx
index 2d25543..9aaa333 100644
--- a/apps/internal-ui/src/features/conversations/ConversationActions.tsx
+++ b/apps/internal-ui/src/features/conversations/ConversationActions.tsx
@@ -4,6 +4,7 @@ import { useState } from "react";
 import { DecisionDialog } from "../../shared/DecisionDialog";
 import { Icon } from "../../shared/icons";
 import { Button } from "../../shared/ui-controls";
+import { t } from "../../i18n";
 
 export function ConversationActions({
   open,
@@ -48,39 +49,39 @@ export function ConversationActions({
     ...(canReturnQueue
       ? [{
           key: "queue",
-          label: <button type="button" onClick={onReturnQueue}><Icon name="refresh" size={15} />Вернуть в очередь</button>,
+          label: <button type="button" onClick={onReturnQueue}><Icon name="refresh" size={15} />{t("conversations.return_queue")}</button>,
         }]
       : []),
     {
       key: "close",
-      label: <button type="button" onClick={onClose}><Icon name="lock" size={15} />Закрыть диалог</button>,
+      label: <button type="button" onClick={onClose}><Icon name="lock" size={15} />{t("conversations.close_conversation")}</button>,
     },
     { type: "divider" as const },
     {
       key: "spam",
-      label: <button className="danger" type="button" onClick={() => setConfirmSpam(true)}><Icon name="warning" size={15} />Пометить как спам</button>,
+      label: <button className="danger" type="button" onClick={() => setConfirmSpam(true)}><Icon name="warning" size={15} />{t("conversations.mark_as_spam")}</button>,
     },
     {
       key: "archive",
-      label: <button className="danger" type="button" onClick={() => setConfirmArchive(true)}><Icon name="trash" size={15} />Удалить диалог</button>,
+      label: <button className="danger" type="button" onClick={() => setConfirmArchive(true)}><Icon name="trash" size={15} />{t("conversations.delete_conversation")}</button>,
     },
   ];
 
   return (
     <>
       <Dropdown menu={{ items }} trigger={["click"]} placement="bottomRight" overlayClassName="app-dropdown">
-        <button className="sales-more-button row-menu-button" type="button" aria-label="Действия диалога"><Icon name="more" size={18} /></button>
+        <button className="sales-more-button row-menu-button" type="button" aria-label={t("conversations.conversation_actions")}><Icon name="more" size={18} /></button>
       </Dropdown>
       <DecisionDialog
         open={confirmSpam}
         onClose={() => !busy && setConfirmSpam(false)}
         tone="danger"
         icon="warning"
-        title="Пометить диалог как спам?"
-        description="Диалог будет закрыт для ответов и останется в истории со статусом «Спам»."
+        title={t("conversations.mark_conversation_as_spam")}
+        description={t("conversations.conversation_will_closed_replies_stay")}
         actions={<>
-          <Button variant="secondary" disabled={busy} onClick={() => setConfirmSpam(false)}>Отмена</Button>
-          <Button variant="danger-outline" icon="warning" disabled={busy} onClick={() => void confirm()}>Пометить как спам</Button>
+          <Button variant="secondary" disabled={busy} onClick={() => setConfirmSpam(false)}>{t("common.cancel")}</Button>
+          <Button variant="danger-outline" icon="warning" disabled={busy} onClick={() => void confirm()}>{t("conversations.mark_as_spam")}</Button>
         </>}
       />
       <DecisionDialog
@@ -88,11 +89,11 @@ export function ConversationActions({
         onClose={() => !busy && setConfirmArchive(false)}
         tone="danger"
         icon="trash"
-        title="Удалить диалог?"
-        description="Диалог уйдёт в архив и исчезнет из списков. Архив видят только администраторы."
+        title={t("conversations.delete_conversation_2")}
+        description={t("conversations.conversation_moves_archive_leaves_lists")}
         actions={<>
-          <Button variant="secondary" disabled={busy} onClick={() => setConfirmArchive(false)}>Отмена</Button>
-          <Button variant="danger-outline" icon="trash" disabled={busy} onClick={() => void confirmArchiveAction()}>Удалить</Button>
+          <Button variant="secondary" disabled={busy} onClick={() => setConfirmArchive(false)}>{t("common.cancel")}</Button>
+          <Button variant="danger-outline" icon="trash" disabled={busy} onClick={() => void confirmArchiveAction()}>{t("common.delete")}</Button>
         </>}
       />
     </>
diff --git a/apps/internal-ui/src/features/conversations/ConversationThread.tsx b/apps/internal-ui/src/features/conversations/ConversationThread.tsx
index c236493..7290846 100644
--- a/apps/internal-ui/src/features/conversations/ConversationThread.tsx
+++ b/apps/internal-ui/src/features/conversations/ConversationThread.tsx
@@ -13,6 +13,7 @@ import type { ApiConversation, ApiMessage } from "./model";
 import type { ConversationHistory } from "./useConversationHistory";
 import { useHistoryScroll } from "./useHistoryScroll";
 import type { ConversationListItem, ControlMode, StatusInfo } from "./types";
+import { t } from "../../i18n";
 
 function fmtTime(value: string): string {
   return new Date(value).toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" });
@@ -32,7 +33,7 @@ export function ConversationThread({ controlMode, dialog, detail, history, isOwn
   });
 
   if (!dialog) {
-    return <div className="sales-timeline"><div className="sales-timeline-inner"><div className="sales-wait-note">Выберите диалог</div></div></div>;
+    return <div className="sales-timeline"><div className="sales-timeline-inner"><div className="sales-wait-note">{t("conversations.pick_conversation")}</div></div></div>;
   }
   const status = statusFor(controlMode, detail?.assignedOperator?.name);
   const channel = providerMeta[dialog.channel];
@@ -40,8 +41,8 @@ export function ConversationThread({ controlMode, dialog, detail, history, isOwn
     <>
       <div className="sales-conversation-head">
         {/* Кадр M2: на мобильном лента — отдельный экран, назад к списку. */}
-        {onMobileBack && <button className="mobile-back" type="button" aria-label="К списку диалогов" onClick={onMobileBack}><Icon name="arrow" size={19} /></button>}
-        {onExpandList && <IconButton bare icon="collapseLeft" iconSize={17} label="Показать список" className="list-expand" onClick={onExpandList} />}
+        {onMobileBack && <button className="mobile-back" type="button" aria-label={t("conversations.back_conversation_list")} onClick={onMobileBack}><Icon name="arrow" size={19} /></button>}
+        {onExpandList && <IconButton bare icon="collapseLeft" iconSize={17} label={t("conversations.show_list")} className="list-expand" onClick={onExpandList} />}
         <div className="sales-conversation-person">
           <span className="sales-conversation-avatar-wrap">
             <ContactAvatar avatarUrl={dialog.avatarUrl} initials={dialog.initials} background={dialog.avatarBg} className="sales-conversation-avatar" />
@@ -64,18 +65,18 @@ export function ConversationThread({ controlMode, dialog, detail, history, isOwn
           {/* Одно действие взятия (решение 2): очередь и AI — primary; у другого
               сотрудника — вторичная кнопка; «ведёте вы» — «Вернуть AI». */}
           {(controlMode === "waiting" || controlMode === "ai") && (
-            <button className="sales-claim-button" onClick={onClaim}><Icon name="check" size={15} />Взять диалог</button>
+            <button className="sales-claim-button" onClick={onClaim}><Icon name="check" size={15} />{t("conversations.take_conversation")}</button>
           )}
-          {controlMode === "assigned" && <button className="sales-secondary-action" onClick={onClaim}>Взять диалог</button>}
-          {controlMode === "human" && <button className="sales-secondary-action" onClick={onRelease}>Вернуть AI</button>}
+          {controlMode === "assigned" && <button className="sales-secondary-action" onClick={onClaim}>{t("conversations.take_conversation")}</button>}
+          {controlMode === "human" && <button className="sales-secondary-action" onClick={onRelease}>{t("conversations.hand_back_ai")}</button>}
           {/* Кадр S2: на узком экране контекст-панель — выдвижная, кнопка в шапке. */}
-          {onToggleContext && <IconButton icon="user" label="Контекст диалога" className="ctx-toggle" onClick={onToggleContext} />}
+          {onToggleContext && <IconButton icon="user" label={t("conversations.conversation_context")} className="ctx-toggle" onClick={onToggleContext} />}
           <ConversationActions open={detail?.lifecycle === "OPEN"} canReturnQueue={controlMode === "human"} onClose={onClose} onSpam={onSpam} onReturnQueue={onReturnQueue} onArchive={onArchive} />
         </div>
       </div>
       <div className="sales-timeline" ref={timelineRef} onScroll={onScroll}>
         <div className="sales-timeline-inner">
-          {history.loaded && messages.length === 0 && <div className="sales-wait-note">Пока нет сообщений</div>}
+          {history.loaded && messages.length === 0 && <div className="sales-wait-note">{t("conversations.no_messages_yet")}</div>}
           {messages.map((message, index) => (
             <Fragment key={message.id}>
               {(index === 0 || !sameDay(messages[index - 1].createdAt, message.createdAt)) && (
@@ -92,8 +93,15 @@ export function ConversationThread({ controlMode, dialog, detail, history, isOwn
 
 function MessageRow({ message, dialog, viewerId }: { message: ApiMessage; dialog: ConversationListItem; viewerId: number | null }) {
   if (message.author === "SYSTEM") {
-    // Системное событие (кадры B, C): передача — предупреждение, взятие — акцент.
-    const tone = /передал/i.test(message.text) ? "warning" : /взял|вернул/i.test(message.text) ? "claimed" : "";
+    // Системное событие (кадры B, C): передача — предупреждение, взятие и
+    // возврат — акцент. Тон выбирается по коду события, а не по словам в
+    // тексте: текст приходит на языке читателя и на английском не совпал бы
+    // ни с одной русской регуляркой.
+    const tone = message.systemEvent === "ai_handed_over" || message.systemEvent === "ai_unavailable"
+      ? "warning"
+      : message.systemEvent === "operator_took" || message.systemEvent === "returned_to_ai" || message.systemEvent === "returned_to_queue"
+        ? "claimed"
+        : "";
     return <div className={`sales-event-chip ${tone}`}><Icon name="clock" size={12} />{message.text}<span>·</span>{fmtTime(message.createdAt)}</div>;
   }
   const side = message.author === "CONTACT" ? "client" : message.author === "OPERATOR" ? "operator" : "ai";
@@ -101,7 +109,7 @@ function MessageRow({ message, dialog, viewerId }: { message: ApiMessage; dialog
   const actor = message.author === "AI"
     ? `AI · ${dialog.agentName}`
     : message.author === "OPERATOR"
-      ? `${message.authorName || "Сотрудник"}${viewerId != null && message.authorUserId === viewerId ? " · вы" : ""}`
+      ? `${message.authorName || t("common.operator")}${viewerId != null && message.authorUserId === viewerId ? t("common.you_suffix") : ""}`
       : undefined;
   return (
     <Message side={side} actor={actor} actorColor={message.author === "AI" ? dialog.agentColor : undefined} time={fmtTime(message.createdAt)} authorInitials={message.authorName ? initialsOf(message.authorName) : ""} authorAvatarUrl={message.authorAvatarUrl ?? null}>
@@ -152,9 +160,9 @@ function sameDay(a: string, b: string): boolean {
 function dayLabel(iso: string): string {
   const date = new Date(iso);
   const now = new Date();
-  if (date.toDateString() === now.toDateString()) return "Сегодня";
+  if (date.toDateString() === now.toDateString()) return t("common.today");
   const yesterday = new Date(now);
   yesterday.setDate(now.getDate() - 1);
-  if (date.toDateString() === yesterday.toDateString()) return "Вчера";
+  if (date.toDateString() === yesterday.toDateString()) return t("admin.yesterday");
   return date.toLocaleDateString("ru-RU", { day: "numeric", month: "long" });
 }
diff --git a/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx b/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx
index 8301f49..7ae27d4 100644
--- a/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx
+++ b/apps/internal-ui/src/features/conversations/ConversationWorkspace.tsx
@@ -35,10 +35,10 @@ function scopeFilters(scope: DialogScope): ConversationListFilters {
 
 export function scopeLabel(scope: DialogScope): string {
   if (scope.kind === "group") return scope.label;
-  if (scope.kind === "ungrouped") return "Без группы";
+  if (scope.kind === "ungrouped") return t("common.no_group");
   if (scope.kind === "agent") return scope.label;
   if (scope.kind === "assignee") return scope.label;
-  return "Все диалоги";
+  return t("profile.all_conversations");
 }
 import type { ConversationListItem, ListSort, ListTab } from "./types";
 import { useConversationCall } from "./useConversationCall";
@@ -48,6 +48,7 @@ import { useConversationHistory } from "./useConversationHistory";
 import { useConversationList } from "./useConversationList";
 import { useDialogKeyboardNav } from "./useDialogKeyboardNav";
 import { useIncomingMessageSound } from "./useIncomingMessageSound";
+import { t } from "../../i18n";
 
 // Общий workspace диалогов (SPEC-HUB-0010 §8.2). Видимость inbox решает
 // backend по группам (ADR-CHATBALLS-0043); страница параметризуется заголовком,
@@ -117,7 +118,7 @@ export function ConversationWorkspace({ isOwner = false, viewerId = null, listTi
         setDetailError("");
       }
     } catch {
-      if (selectedIdRef.current === id) setDetailError("Не удалось загрузить диалог");
+      if (selectedIdRef.current === id) setDetailError(t("conversations.could_not_load_conversation"));
     }
   }, []);
 
@@ -177,7 +178,7 @@ export function ConversationWorkspace({ isOwner = false, viewerId = null, listTi
       applyUpdated(await action(selectedId));
       return true;
     } catch (error) {
-      setActionError(error instanceof Error ? error.message : "Не удалось выполнить действие");
+      setActionError(error instanceof Error ? error.message : t("common.could_not_complete_action"));
       return false;
     }
   }
@@ -226,11 +227,11 @@ export function ConversationWorkspace({ isOwner = false, viewerId = null, listTi
         hint={hint}
       />
       {!selectedDialog && (
-        <section className="sales-conversation"><div className="sales-conversation-empty">Выберите диалог</div></section>
+        <section className="sales-conversation"><div className="sales-conversation-empty">{t("conversations.pick_conversation")}</div></section>
       )}
       {selectedDialog && (
       <section className="sales-conversation enter-surface" key={selectedDialog.id}>
-        {ctxOpen && <button className="ctx-backdrop" type="button" aria-label="Закрыть панель" onClick={() => setCtxOpen(false)} />}
+        {ctxOpen && <button className="ctx-backdrop" type="button" aria-label={t("admin.close_panel")} onClick={() => setCtxOpen(false)} />}
         <ConversationThread controlMode={controlMode} dialog={selectedDialog} detail={detail} history={history} isOwner={isOwner} onExpandList={listCollapsed ? () => setListCollapsed(false) : undefined} viewerId={viewerId} onClaim={onClaim} onRelease={onRelease} onClose={onClose} onSpam={onSpam} onReturnQueue={onReturnQueue} onArchive={onArchive} onToggleContext={() => setCtxOpen((open) => !open)} onMobileBack={() => setMobileDialogOpen(false)} />
         {(detailError || actionError || history.errorText) && <div className="sales-conversation-error">{detailError || actionError || history.errorText}</div>}
         <CallOverlay
diff --git a/apps/internal-ui/src/features/conversations/DialogControls.tsx b/apps/internal-ui/src/features/conversations/DialogControls.tsx
index 1fe4554..2723ca7 100644
--- a/apps/internal-ui/src/features/conversations/DialogControls.tsx
+++ b/apps/internal-ui/src/features/conversations/DialogControls.tsx
@@ -23,16 +23,17 @@ import {
   type ConversationPriority,
 } from "./model";
 import type { EmployeeGroupRef } from "../../types";
+import { t } from "../../i18n";
 
 // Блок «Диалог» контекст-панели (дизайн-базлайн v2, решение 5): Ответственный,
 // Группа, Приоритет — полноширинные селекты; Агент и Режим — read-only в две
 // колонки; Метки — чипы с «+ Добавить»; Начат. Заметка — отдельная жёлтая карточка.
 
 const PRIORITY_OPTIONS: Array<[ConversationPriority, string]> = [
-  ["HIGH", "Высокий"],
-  ["MEDIUM", "Средний"],
-  ["LOW", "Низкий"],
-  ["NONE", "Не задан"],
+  ["HIGH", t("conversations.high")],
+  ["MEDIUM", t("conversations.medium")],
+  ["LOW", t("conversations.low")],
+  ["NONE", t("conversations.not_set")],
 ];
 const PRIORITY_TEXT: Record<ConversationPriority, string> = {
   HIGH: "var(--error-text)",
@@ -79,7 +80,7 @@ export function DialogControls({
     try {
       applyConversation(await action());
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось сохранить");
+      setErrorText(error instanceof Error ? error.message : t("common.could_not_save"));
     } finally {
       setBusy(false);
     }
@@ -101,7 +102,7 @@ export function DialogControls({
       const ids = [...new Set([...detail.labels.map((item) => item.id), labelId])];
       applyConversation(await setConversationLabels(detail.id, ids));
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось добавить метку");
+      setErrorText(error instanceof Error ? error.message : t("conversations.could_not_add_label"));
     } finally {
       setBusy(false);
     }
@@ -110,23 +111,23 @@ export function DialogControls({
   const assignedIds = new Set(detail.labels.map((item) => item.id));
   const availableLabels = labels.filter((item) => !assignedIds.has(item.id));
   const assignee = detail.assignedOperator;
-  const assigneeLabel = assignee ? `${assignee.name}${viewerId != null && assignee.id === viewerId ? " · вы" : ""}` : "Не назначен";
+  const assigneeLabel = assignee ? `${assignee.name}${viewerId != null && assignee.id === viewerId ? t("common.you_suffix") : ""}` : t("conversations.unassigned");
   const status = statusFor(controlModeOf(detail), assignee?.name);
-  const priorityLabel = PRIORITY_OPTIONS.find(([value]) => value === detail.priority)?.[1] ?? "Не задан";
+  const priorityLabel = PRIORITY_OPTIONS.find(([value]) => value === detail.priority)?.[1] ?? t("conversations.not_set");
   const canEdit = directory.employees.length > 0 || groups.length > 0;
 
   return (
     <>
       <section className="ctx-section">
         <div className="ctx-section-head">
-          <h4>Диалог</h4>
-          <button type="button" aria-label={collapsed ? "Развернуть" : "Свернуть"} className={collapsed ? "is-collapsed" : ""} onClick={() => setCollapsed((value) => !value)}><Icon name="chevron" size={14} /></button>
+          <h4>{t("conversations.conversation")}</h4>
+          <button type="button" aria-label={collapsed ? t("profile.expand") : t("conversations.collapse")} className={collapsed ? "is-collapsed" : ""} onClick={() => setCollapsed((value) => !value)}><Icon name="chevron" size={14} /></button>
         </div>
         {!collapsed && (
           <div className="ctx-fields">
             {errorText && <p className="ctx-error">{errorText}</p>}
 
-            <label className="ctx-label">Ответственный</label>
+            <label className="ctx-label">{t("common.assignee")}</label>
             <Dropdown
               disabled={busy || (directory.employees.length === 0 && !directory.query)}
               trigger={["click"]}
@@ -142,17 +143,17 @@ export function DialogControls({
                       label: (
                         <SearchInput
                           className="ctx-menu-search"
-                          placeholder="Имя или почта"
+                          placeholder={t("conversations.name_or_email")}
                           value={directory.query}
                           onChange={directory.setQuery}
                         />
                       ),
                     }]
                     : []),
-                  { key: "none", label: <button type="button" className={assignee ? "" : "is-checked"} onClick={() => void run(() => setConversationAssignee(detail.id, null))}><span className="ctx-avatar-empty" /><span>Не назначен</span>{!assignee && <Icon name="check" size={15} />}</button> },
+                  { key: "none", label: <button type="button" className={assignee ? "" : "is-checked"} onClick={() => void run(() => setConversationAssignee(detail.id, null))}><span className="ctx-avatar-empty" /><span>{t("conversations.unassigned")}</span>{!assignee && <Icon name="check" size={15} />}</button> },
                   ...directory.employees.map((employee) => ({
                     key: employee.id,
-                    label: <button type="button" className={assignee?.id === employee.id ? "is-checked" : ""} onClick={() => void run(() => setConversationAssignee(detail.id, employee.id))}><SmallAvatar name={employee.name} avatarUrl={employee.avatarUrl} /><span>{employee.name}{viewerId === employee.id ? " · вы" : ""}</span>{assignee?.id === employee.id && <Icon name="check" size={15} />}</button>,
+                    label: <button type="button" className={assignee?.id === employee.id ? "is-checked" : ""} onClick={() => void run(() => setConversationAssignee(detail.id, employee.id))}><SmallAvatar name={employee.name} avatarUrl={employee.avatarUrl} /><span>{employee.name}{viewerId === employee.id ? t("common.you_suffix") : ""}</span>{assignee?.id === employee.id && <Icon name="check" size={15} />}</button>,
                   })),
                 ],
               }}
@@ -164,7 +165,7 @@ export function DialogControls({
               </button>
             </Dropdown>
 
-            <label className="ctx-label">Группа</label>
+            <label className="ctx-label">{t("common.group")}</label>
             <Dropdown
               disabled={busy || groups.length === 0}
               trigger={["click"]}
@@ -172,24 +173,24 @@ export function DialogControls({
               menu={{
                 // Кадр G: заголовок «Перенести в группу», отмеченный пункт с галочкой, подпись внизу.
                 items: [
-                  { key: "title", type: "group" as const, label: "Перенести в группу" },
-                  { key: "none", label: <button type="button" className={detail.group ? "" : "is-checked"} onClick={() => void run(() => setConversationGroup(detail.id, null))}><i className="ctx-dot is-muted" /><span>Без группы</span>{!detail.group && <Icon name="check" size={15} />}</button> },
+                  { key: "title", type: "group" as const, label: t("conversations.move_group") },
+                  { key: "none", label: <button type="button" className={detail.group ? "" : "is-checked"} onClick={() => void run(() => setConversationGroup(detail.id, null))}><i className="ctx-dot is-muted" /><span>{t("common.no_group")}</span>{!detail.group && <Icon name="check" size={15} />}</button> },
                   ...groups.map((group) => ({
                     key: group.id,
                     label: <button type="button" className={detail.group?.id === group.id ? "is-checked" : ""} onClick={() => void run(() => setConversationGroup(detail.id, group.id))}><i className="ctx-dot" style={{ background: groupColorOf(group.id, group.color) }} /><span>{group.name}</span>{detail.group?.id === group.id && <Icon name="check" size={15} />}</button>,
                   })),
-                  { key: "note", type: "group" as const, className: "ctx-menu-note", label: "Диалог без группы видят все сотрудники." },
+                  { key: "note", type: "group" as const, className: "ctx-menu-note", label: t("conversations.conversation_without_group_visible_every") },
                 ],
               }}
             >
               <button type="button" className="ctx-select">
                 <i className={`ctx-dot ${detail.group ? "" : "is-muted"}`} style={detail.group ? { background: groupColorOf(detail.group.id, detail.group.color) } : undefined} />
-                <span>{detail.group?.name ?? "Без группы"}</span>
+                <span>{detail.group?.name ?? t("common.no_group")}</span>
                 {canEdit && <Icon name="chevron" size={14} />}
               </button>
             </Dropdown>
 
-            <label className="ctx-label">Приоритет</label>
+            <label className="ctx-label">{t("conversations.priority")}</label>
             <Dropdown
               disabled={busy}
               trigger={["click"]}
@@ -210,16 +211,16 @@ export function DialogControls({
 
             <div className="ctx-grid">
               <div>
-                <label className="ctx-label">Агент</label>
+                <label className="ctx-label">{t("common.agent")}</label>
                 <div className="ctx-readonly" style={{ color: agentColorOf(detail.channel.id) }}><Icon name="robot" size={14} />{detail.channel.name}</div>
               </div>
               <div>
-                <label className="ctx-label">Режим</label>
+                <label className="ctx-label">{t("conversations.mode")}</label>
                 <div className="ctx-readonly is-mode" style={{ color: status.color, background: status.bg, borderColor: status.border }}><i style={{ background: status.dot }} />{status.label}</div>
               </div>
             </div>
 
-            <label className="ctx-label">Метки</label>
+            <label className="ctx-label">{t("conversations.labels")}</label>
             <div className="ctx-labels">
               <Dropdown
                 disabled={busy}
@@ -236,7 +237,7 @@ export function DialogControls({
                       label: (
                         <div className="ctx-new-label" onClick={(event) => event.stopPropagation()}>
                           <input
-                            placeholder="Новая метка"
+                            placeholder={t("conversations.new_label")}
                             value={newLabel}
                             onChange={(event) => setNewLabel(event.target.value)}
                             onKeyDown={(event) => {
@@ -253,14 +254,14 @@ export function DialogControls({
                   ],
                 }}
               >
-                <button type="button" className="ctx-add-label"><Icon name="plus" size={13} />Добавить</button>
+                <button type="button" className="ctx-add-label"><Icon name="plus" size={13} />{t("conversations.add")}</button>
               </Dropdown>
               {detail.labels.map((label) => (
                 <b className="ctx-label-chip" key={label.id}>
                   <i style={{ background: label.color || "var(--n-5)" }} />
                   {label.name}
                   <button
-                    aria-label={`Снять метку ${label.name}`}
+                    aria-label={t("conversations.remove_label", { name: label.name })}
                     disabled={busy}
                     type="button"
                     onClick={() => void run(() => setConversationLabels(detail.id, detail.labels.filter((item) => item.id !== label.id).map((item) => item.id)))}
@@ -271,7 +272,7 @@ export function DialogControls({
               ))}
             </div>
 
-            <div className="ctx-meta-row"><span>Начат</span><span>{startedLabel(detail.createdAt)}</span></div>
+            <div className="ctx-meta-row"><span>{t("conversations.started")}</span><span>{startedLabel(detail.createdAt)}</span></div>
           </div>
         )}
       </section>
@@ -293,19 +294,19 @@ function NoteSection({ detail, busy, onSave }: { detail: ApiConversation; busy:
   return (
     <section className="ctx-section is-note">
       <div className="ctx-section-head">
-        <h4>Заметка</h4>
-        <button type="button" aria-label="Редактировать заметку" onClick={() => setEditing(true)}><Icon name="edit" size={14} /></button>
+        <h4>{t("conversations.note")}</h4>
+        <button type="button" aria-label={t("conversations.edit_note")} onClick={() => setEditing(true)}><Icon name="edit" size={14} /></button>
       </div>
       {editing ? (
         <div className="ctx-note is-editing">
-          <textarea autoFocus disabled={busy} placeholder="Внутренняя заметка — клиент её не видит" rows={3} value={draft} onChange={(event) => setDraft(event.target.value)} />
+          <textarea autoFocus disabled={busy} placeholder={t("conversations.internal_note_customer_does_not")} rows={3} value={draft} onChange={(event) => setDraft(event.target.value)} />
           <div className="ctx-note-actions">
-            <button type="button" disabled={busy} onClick={() => { setDraft(detail.note); setEditing(false); }}>Отмена</button>
-            <button type="button" className="primary" disabled={busy} onClick={() => void onSave(draft).then(() => setEditing(false))}>Сохранить</button>
+            <button type="button" disabled={busy} onClick={() => { setDraft(detail.note); setEditing(false); }}>{t("common.cancel")}</button>
+            <button type="button" className="primary" disabled={busy} onClick={() => void onSave(draft).then(() => setEditing(false))}>{t("common.save")}</button>
           </div>
         </div>
       ) : (
-        <div className={`ctx-note ${detail.note ? "" : "is-empty"}`} onClick={() => setEditing(true)}>{detail.note || "Заметок нет"}</div>
+        <div className={`ctx-note ${detail.note ? "" : "is-empty"}`} onClick={() => setEditing(true)}>{detail.note || t("conversations.no_notes")}</div>
       )}
     </section>
   );
@@ -316,10 +317,10 @@ export function startedLabel(iso: string): string {
   const date = new Date(iso);
   const now = new Date();
   const time = date.toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" });
-  if (date.toDateString() === now.toDateString()) return `сегодня, ${time}`;
+  if (date.toDateString() === now.toDateString()) return t("time.today_comma", { time });
   const yesterday = new Date(now);
   yesterday.setDate(now.getDate() - 1);
-  if (date.toDateString() === yesterday.toDateString()) return `вчера, ${time}`;
+  if (date.toDateString() === yesterday.toDateString()) return t("time.yesterday_comma", { time });
   return `${date.toLocaleDateString("ru-RU", { day: "numeric", month: "short" }).replace(".", "")}, ${time}`;
 }
 
@@ -334,7 +335,7 @@ export function archiveConversationAction(
       return true;
     })
     .catch((error) => {
-      onError(error instanceof Error ? error.message : "Не удалось удалить диалог");
+      onError(error instanceof Error ? error.message : t("conversations.could_not_delete_conversation"));
       return false;
     });
 }
diff --git a/apps/internal-ui/src/features/conversations/DialogList.tsx b/apps/internal-ui/src/features/conversations/DialogList.tsx
index 641b900..e36c262 100644
--- a/apps/internal-ui/src/features/conversations/DialogList.tsx
+++ b/apps/internal-ui/src/features/conversations/DialogList.tsx
@@ -11,8 +11,9 @@ import { agentColorOf, groupColorOf } from "./model";
 import type { ConversationCounters } from "./model";
 import type { ConversationListItem, ListSort, ListTab } from "./types";
 import { SearchInput } from "../../shared/ui-controls";
+import { t } from "../../i18n";
 
-export function DialogList({ title = "Диалоги", searchPlaceholder = "Поиск по контакту, сообщению…", viewerId = null, scope, counters, setScope, showScopeSwitcher = true, mobileHeader, hint, dialogs, total, hasMore, onLoadMore, narrowed, listTab, selectedId, search, errorText, sort, setSort, onCollapse, setSearch, setListTab, setSelectedId }: {
+export function DialogList({ title = t("common.conversations"), searchPlaceholder = t("conversations.search_by_contact_or_message"), viewerId = null, scope, counters, setScope, showScopeSwitcher = true, mobileHeader, hint, dialogs, total, hasMore, onLoadMore, narrowed, listTab, selectedId, search, errorText, sort, setSort, onCollapse, setSearch, setListTab, setSelectedId }: {
   title?: string;
   searchPlaceholder?: string;
   sort: ListSort;
@@ -53,7 +54,7 @@ export function DialogList({ title = "Диалоги", searchPlaceholder = "По
   const listWidth = useResizableWidth("dialogList", { fallback: 323, min: 280, max: 520 });
   return (
     <section className={`sales-dialog-list ${listWidth.dragging ? "is-resizing" : ""}`} style={{ "--dialog-list-width": `${listWidth.width}px` } as CSSProperties}>
-      <div className="pane-resizer" role="separator" aria-orientation="vertical" aria-label="Ширина списка диалогов" title="Потяните, двойной клик — сбросить" onPointerDown={listWidth.onPointerDown} onDoubleClick={listWidth.reset} />
+      <div className="pane-resizer" role="separator" aria-orientation="vertical" aria-label={t("conversations.conversation_list_width")} title={t("profile.drag_resize_double_click_reset")} onPointerDown={listWidth.onPointerDown} onDoubleClick={listWidth.reset} />
       {mobileHeader?.({ total })}
       <div className="sales-dialog-list-head">
         <div>
@@ -67,22 +68,22 @@ export function DialogList({ title = "Диалоги", searchPlaceholder = "По
               overlayClassName="app-dropdown"
               menu={{
                 items: [
-                  { key: "activity", label: <button type="button" className={sort === "activity" ? "is-checked" : ""} onClick={() => setSort("activity")}>По последнему сообщению</button> },
-                  { key: "waiting", label: <button type="button" className={sort === "waiting" ? "is-checked" : ""} onClick={() => setSort("waiting")}>По времени ожидания</button> },
+                  { key: "activity", label: <button type="button" className={sort === "activity" ? "is-checked" : ""} onClick={() => setSort("activity")}>{t("conversations.by_last_message")}</button> },
+                  { key: "waiting", label: <button type="button" className={sort === "waiting" ? "is-checked" : ""} onClick={() => setSort("waiting")}>{t("conversations.by_waiting_time")}</button> },
                 ],
               }}
             >
-              <button type="button" aria-label="Сортировка" title={sort === "activity" ? "Сортировка: по последнему сообщению" : "Сортировка: по времени ожидания"}><Icon name="sort" size={15} /></button>
+              <button type="button" aria-label={t("conversations.sorting")} title={sort === "activity" ? t("conversations.sorting_by_last_message") : t("conversations.sorting_by_waiting_time")}><Icon name="sort" size={15} /></button>
             </Dropdown>
-            {onCollapse && <button type="button" aria-label="Скрыть список" title="Скрыть список" onClick={onCollapse}><Icon name="collapseLeft" size={15} /></button>}
+            {onCollapse && <button type="button" aria-label={t("conversations.hide_list")} title={t("conversations.hide_list")} onClick={onCollapse}><Icon name="collapseLeft" size={15} /></button>}
           </span>
         </div>
         <SearchInput className="sales-dialog-search" placeholder={searchPlaceholder} value={search} onChange={setSearch} hotkey="/" />
       </div>
       <div className="sales-dialog-tabs">
-        <DialogTab active={listTab === "all"} onClick={() => setListTab("all")}>Все</DialogTab>
-        <DialogTab active={listTab === "mine"} onClick={() => setListTab("mine")}>Мои</DialogTab>
-        <DialogTab active={listTab === "wait"} onClick={() => setListTab("wait")}>Ждут оператора{waitCount > 0 && <b>{waitCount}</b>}</DialogTab>
+        <DialogTab active={listTab === "all"} onClick={() => setListTab("all")}>{t("common.all")}</DialogTab>
+        <DialogTab active={listTab === "mine"} onClick={() => setListTab("mine")}>{t("conversations.mine")}</DialogTab>
+        <DialogTab active={listTab === "wait"} onClick={() => setListTab("wait")}>{t("conversations.waiting_for_operator")}{waitCount > 0 && <b>{waitCount}</b>}</DialogTab>
       </div>
       {hint}
       <div className="sales-dialog-list-body" onScroll={onScroll}>
@@ -92,7 +93,7 @@ export function DialogList({ title = "Диалоги", searchPlaceholder = "По
         {!errorText && dialogs.length === 0 && (
           <div className="sales-dialog-list-empty">
             <span><Icon name={narrowed ? "search" : "message"} size={20} /></span>
-            <p>{narrowed ? "Диалоги не найдены" : "Диалоги появятся, когда клиенты напишут вашему агенту"}</p>
+            <p>{narrowed ? t("conversations.no_conversations_found") : t("conversations.conversations_appear_once_customers_write")}</p>
           </div>
         )}
         {dialogs.map((dialog) => <DialogListItem dialog={dialog} active={dialog.id === selectedId} setSelectedId={setSelectedId} key={dialog.id} />)}
@@ -144,7 +145,7 @@ function DialogListItem({ dialog, active, setSelectedId }: { dialog: Conversatio
   );
 }
 
-const PRIORITY_TITLE: Record<string, string> = { HIGH: "Высокий", MEDIUM: "Средний", LOW: "Низкий" };
+const PRIORITY_TITLE: Record<string, string> = { HIGH: t("conversations.high"), MEDIUM: t("conversations.medium"), LOW: t("conversations.low") };
 const PRIORITY_ON: Record<string, number> = { HIGH: 3, MEDIUM: 2, LOW: 1 };
 const PRIORITY_COLOR: Record<string, string> = { HIGH: "#ff4d4f", MEDIUM: "#fa8c16", LOW: "var(--primary)" };
 
@@ -164,7 +165,7 @@ export function PriorityBars({ priority, placeholder = false }: { priority: "HIG
 // Переключатель охвата (дизайн-базлайн v2 A1): Все диалоги · Группы · Агенты ·
 // Ответственный. Дерево фильтров живёт в заголовке списка, сайдбар остаётся плоским.
 function ScopeSwitcher({ scope, counters, setScope, fallbackTitle, total, viewerId }: { scope: DialogScope; counters: ConversationCounters | null; setScope: (scope: DialogScope) => void; fallbackTitle: string; total: number; viewerId: number | null }) {
-  const heading = scope.kind === "all" ? (counters ? "Все диалоги" : fallbackTitle) : scopeLabel(scope);
+  const heading = scope.kind === "all" ? (counters ? t("profile.all_conversations") : fallbackTitle) : scopeLabel(scope);
   if (!counters || (counters.groups.length === 0 && counters.agents.length <= 1 && counters.assignees.length === 0)) {
     return <h2 className="sales-dialog-list-title">{heading}<small>{total}</small></h2>;
   }
@@ -176,17 +177,17 @@ function ScopeSwitcher({ scope, counters, setScope, fallbackTitle, total, viewer
   });
   const head = (key: string, label: string) => ({ key, type: "group" as const, label });
   const items = [
-    item("all", { kind: "all" }, <Icon name="inbox" size={15} />, "Все диалоги", counters.all),
+    item("all", { kind: "all" }, <Icon name="inbox" size={15} />, t("profile.all_conversations"), counters.all),
     ...(counters.groups.length > 0
       ? [
-          head("groups-head", "Группы"),
+          head("groups-head", t("common.groups")),
           ...counters.groups.map((group) => item(`group-${group.id}`, { kind: "group", id: group.id, label: group.name }, <i className="scope-dot" style={{ background: groupColorOf(group.id, group.color) }} />, group.name, group.count)),
-          item("ungrouped", { kind: "ungrouped" }, <i className="scope-dot is-muted" />, "Без группы", counters.ungrouped),
+          item("ungrouped", { kind: "ungrouped" }, <i className="scope-dot is-muted" />, t("common.no_group"), counters.ungrouped),
         ]
       : []),
     ...(counters.agents.length > 0
       ? [
-          head("agents-head", "Агенты"),
+          head("agents-head", t("common.agents")),
           ...counters.agents.map((agent) => {
             const color = agentColorOf(agent.id);
             return item(`agent-${agent.id}`, { kind: "agent", id: agent.id, label: agent.name }, <span className="scope-agent" style={{ color, background: `color-mix(in srgb, ${color} 16%, var(--surface-card))` }}><Icon name="robot" size={11} /></span>, agent.name, agent.count);
@@ -195,8 +196,8 @@ function ScopeSwitcher({ scope, counters, setScope, fallbackTitle, total, viewer
       : []),
     ...(counters.assignees.length > 0
       ? [
-          head("assignees-head", "Ответственный"),
-          ...counters.assignees.map((assignee) => item(`assignee-${assignee.id}`, { kind: "assignee", id: assignee.id, label: assignee.name }, <span className={`scope-avatar ${assignee.avatarUrl ? "has-photo" : ""}`}>{assignee.avatarUrl ? <img src={assignee.avatarUrl} alt="" /> : initialsOf(assignee.name)}</span>, assignee.id === viewerId ? `${assignee.name} · вы` : assignee.name, assignee.count)),
+          head("assignees-head", t("common.assignee")),
+          ...counters.assignees.map((assignee) => item(`assignee-${assignee.id}`, { kind: "assignee", id: assignee.id, label: assignee.name }, <span className={`scope-avatar ${assignee.avatarUrl ? "has-photo" : ""}`}>{assignee.avatarUrl ? <img src={assignee.avatarUrl} alt="" /> : initialsOf(assignee.name)}</span>, assignee.id === viewerId ? `${assignee.name}${t("common.you_suffix")}` : assignee.name, assignee.count)),
         ]
       : []),
   ];
diff --git a/apps/internal-ui/src/features/conversations/EmailMessageBody.tsx b/apps/internal-ui/src/features/conversations/EmailMessageBody.tsx
index 543512c..083619d 100644
--- a/apps/internal-ui/src/features/conversations/EmailMessageBody.tsx
+++ b/apps/internal-ui/src/features/conversations/EmailMessageBody.tsx
@@ -1,6 +1,7 @@
 import { useMemo } from "react";
 
 import { foldQuotedHtml, splitQuotedEmail } from "./emailContent";
+import { t } from "../../i18n";
 
 const DOCUMENT_START = `<!doctype html>
 <html lang="ru">
@@ -37,7 +38,7 @@ export function EmailMessageBody({ html, text }: { html?: string; text: string }
         {textParts.latest && <div>{textParts.latest}</div>}
         {textParts.quoted && (
           <details className="sales-email-quoted">
-            <summary>Показать предыдущие сообщения</summary>
+            <summary>{t("conversations.show_earlier_messages")}</summary>
             <div>{textParts.quoted}</div>
           </details>
         )}
@@ -50,7 +51,7 @@ export function EmailMessageBody({ html, text }: { html?: string; text: string }
       referrerPolicy="no-referrer"
       sandbox=""
       srcDoc={srcDoc}
-      title="Содержимое письма"
+      title={t("conversations.email_content")}
     />
   );
 }
diff --git a/apps/internal-ui/src/features/conversations/EmojiPicker.tsx b/apps/internal-ui/src/features/conversations/EmojiPicker.tsx
index 22a29c5..90fce3d 100644
--- a/apps/internal-ui/src/features/conversations/EmojiPicker.tsx
+++ b/apps/internal-ui/src/features/conversations/EmojiPicker.tsx
@@ -2,6 +2,7 @@ import { Dropdown } from "antd";
 import { useState } from "react";
 
 import { Icon } from "../../shared/icons";
+import { t } from "../../i18n";
 
 // Эмодзи в композере (дизайн-базлайн v2, кнопка «Эмодзи»): antd Dropdown —
 // единый стандарт всплывающих меню — с сеткой частых эмодзи для переписки.
@@ -23,7 +24,7 @@ export function EmojiPicker({ onPick, disabled }: { onPick: (emoji: string) => v
       overlayClassName="app-dropdown composer-emoji"
       disabled={disabled}
       popupRender={() => (
-        <div className="ant-dropdown-menu composer-emoji-grid" role="listbox" aria-label="Эмодзи">
+        <div className="ant-dropdown-menu composer-emoji-grid" role="listbox" aria-label={t("common.emoji")}>
           {EMOJI.map((emoji) => (
             <button
               key={emoji}
@@ -39,7 +40,7 @@ export function EmojiPicker({ onPick, disabled }: { onPick: (emoji: string) => v
         </div>
       )}
     >
-      <button className="composer-tool" title="Эмодзи" aria-label="Эмодзи" type="button" disabled={disabled}>
+      <button className="composer-tool" title={t("common.emoji")} aria-label={t("common.emoji")} type="button" disabled={disabled}>
         <Icon name="smile" size={17} />
       </button>
     </Dropdown>
diff --git a/apps/internal-ui/src/features/conversations/FileMessage.tsx b/apps/internal-ui/src/features/conversations/FileMessage.tsx
index 4563cd6..9e8e278 100644
--- a/apps/internal-ui/src/features/conversations/FileMessage.tsx
+++ b/apps/internal-ui/src/features/conversations/FileMessage.tsx
@@ -5,6 +5,7 @@ import { ImageLightbox } from "./ImageLightbox";
 import { resolveApiUrl } from "../../api/client";
 import { formatSize } from "../ai/knowledge/model";
 import { isImageAttachment, type ApiMessage } from "./model";
+import { t } from "../../i18n";
 
 // Файл или фото в ленте: фото — превью со ссылкой на оригинал, остальное —
 // карточка с именем, размером и ссылкой «Скачать» (единый `.link`).
@@ -19,9 +20,9 @@ function scrollFeedToLatest(event: SyntheticEvent<HTMLImageElement>) {
 export function FileMessage({ message }: { message: ApiMessage }) {
   const [lightbox, setLightbox] = useState(false);
   const url = message.attachmentUrl ? resolveApiUrl(message.attachmentUrl) : "";
-  const name = message.attachmentName || "Файл";
+  const name = message.attachmentName || t("conversations.file");
   if (!url) {
-    return <span className="file-message-missing">Файл «{name}» недоступен</span>;
+    return <span className="file-message-missing">{t("conversations.file_unavailable", { name })}</span>;
   }
   const image = isImageAttachment(message);
   return (
@@ -42,7 +43,7 @@ export function FileMessage({ message }: { message: ApiMessage }) {
               <strong title={name}>{name}</strong>
               <small>{message.attachmentSize ? formatSize(message.attachmentSize) : ""}</small>
             </div>
-            <a className="link" href={url} download={name}>Скачать</a>
+            <a className="link" href={url} download={name}>{t("common.download")}</a>
           </div>
         )}
       {message.text && <p className="file-message-caption">{message.text}</p>}
diff --git a/apps/internal-ui/src/features/conversations/ImageLightbox.tsx b/apps/internal-ui/src/features/conversations/ImageLightbox.tsx
index ba69234..d0fb336 100644
--- a/apps/internal-ui/src/features/conversations/ImageLightbox.tsx
+++ b/apps/internal-ui/src/features/conversations/ImageLightbox.tsx
@@ -2,6 +2,7 @@ import { Modal } from "antd";
 
 import { Icon } from "../../shared/icons";
 import { formatSize } from "../ai/knowledge/model";
+import { t } from "../../i18n";
 
 // Просмотр фото из ленты: сам снимок по центру на затемнённом фоне, без
 // карточки; над ним одна строка — имя, размер, «Скачать» и закрытие.
@@ -13,8 +14,8 @@ export function ImageLightbox({ open, url, downloadUrl, name, size, onClose }: {
         <span className="image-lightbox-name" title={name}>{name}</span>
         {size ? <span className="image-lightbox-size">{formatSize(size)}</span> : null}
         <span className="image-lightbox-spacer" />
-        <a className="image-lightbox-action" href={downloadUrl} download={name} title="Скачать"><Icon name="download" size={16} /><span>Скачать</span></a>
-        <button className="image-lightbox-action" type="button" aria-label="Закрыть" title="Закрыть · Esc" onClick={onClose}><Icon name="xCircle" size={18} /></button>
+        <a className="image-lightbox-action" href={downloadUrl} download={name} title={t("common.download")}><Icon name="download" size={16} /><span>{t("common.download")}</span></a>
+        <button className="image-lightbox-action" type="button" aria-label={t("common.close")} title={t("conversations.close_esc")} onClick={onClose}><Icon name="xCircle" size={18} /></button>
       </div>
       <img className="image-lightbox-img" src={url} alt={name} />
     </Modal>
diff --git a/apps/internal-ui/src/features/conversations/VideoCallOverlay.tsx b/apps/internal-ui/src/features/conversations/VideoCallOverlay.tsx
index 52ede7f..986f90b 100644
--- a/apps/internal-ui/src/features/conversations/VideoCallOverlay.tsx
+++ b/apps/internal-ui/src/features/conversations/VideoCallOverlay.tsx
@@ -10,14 +10,15 @@ import { providerMeta } from "../../shared/providers";
 import { endCallByAccess, type ApiCall, type CallAccess } from "./model";
 import type { ConversationListItem } from "./types";
 import "./call.css";
+import { t } from "../../i18n";
 
 const TERMINAL: Record<string, { icon: CallViewStatus["icon"]; title: string; caption: (name: string) => string; tone: "neutral" | "error" | "warn"; retry?: string }> = {
-  DECLINED: { icon: "declined", title: "Звонок отклонён", caption: (name) => `${name} отклонил(а) вызов.`, tone: "neutral", retry: "Позвонить снова" },
-  MISSED: { icon: "missed", title: "Пропущенный звонок", caption: (name) => `${name} не ответил(а) на вызов.`, tone: "warn", retry: "Перезвонить" },
-  EXPIRED: { icon: "clock", title: "Время ожидания истекло", caption: () => "Никто не ответил вовремя. Попробуйте позвонить снова.", tone: "warn", retry: "Позвонить снова" },
-  CANCELLED: { icon: "declined", title: "Звонок отменён", caption: () => "Приглашение отменено.", tone: "neutral" },
-  FAILED: { icon: "alert", title: "Не удалось соединиться", caption: () => "Проверьте интернет-соединение и попробуйте снова.", tone: "error", retry: "Повторить" },
-  ENDED: { icon: "declined", title: "Звонок завершён", caption: () => "Разговор завершён.", tone: "neutral" },
+  DECLINED: { icon: "declined", title: t("conversations.call_declined"), caption: (name) => t("conversations.call_declined_by", { name }), tone: "neutral", retry: t("conversations.call_again") },
+  MISSED: { icon: "missed", title: t("conversations.missed_call"), caption: (name) => t("conversations.call_unanswered_by", { name }), tone: "warn", retry: t("conversations.call_back") },
+  EXPIRED: { icon: "clock", title: t("conversations.wait_timed_out"), caption: () => t("conversations.nobody_answered_time_try_calling"), tone: "warn", retry: t("conversations.call_again") },
+  CANCELLED: { icon: "declined", title: t("conversations.call_cancelled"), caption: () => t("conversations.invitation_was_cancelled"), tone: "neutral" },
+  FAILED: { icon: "alert", title: t("conversations.could_not_connect"), caption: () => t("conversations.check_internet_connection_try_again"), tone: "error", retry: t("common.try_again") },
+  ENDED: { icon: "declined", title: t("conversations.call_ended"), caption: () => t("conversations.conversation_has_ended"), tone: "neutral" },
 };
 
 type Props = {
@@ -64,7 +65,7 @@ export function VideoCallOverlay(props: Props) {
   if (!props.dialog) return null;
   const channel = providerMeta[props.dialog.channel];
   const subtitle = subtitleFor(mode, call, status);
-  const mediaCaption = rtc.mediaIssue === "devices" ? "Нет доступа к камере и микрофону" : rtc.mediaIssue === "video" ? "Камера недоступна" : "Камера выключена";
+  const mediaCaption = rtc.mediaIssue === "devices" ? t("conversations.no_access_camera_microphone") : rtc.mediaIssue === "video" ? t("conversations.camera_unavailable") : t("conversations.camera_off");
   const finish = async () => {
     const token = props.access?.accessToken;
     if (!token || !call || TERMINAL[call.status]) return;
@@ -116,48 +117,48 @@ function resolveMode(call: ApiCall | null, errorText: string, connection: string
 }
 
 function buildStatus(props: Props, connection: string, mediaIssue: string, onReconnect: () => void, onPrepare: () => void, onJoin: () => void): CallViewStatus | undefined {
-  if (props.errorText) return { icon: "alert", tone: "error", title: "Не удалось запросить звонок", caption: props.errorText };
-  if (mediaIssue === "unsupported") return { icon: "unsupported", tone: "error", title: "Видеозвонки не поддерживаются", caption: "Обновите браузер или откройте ссылку в Chrome, Safari или Edge." };
+  if (props.errorText) return { icon: "alert", tone: "error", title: t("conversations.could_not_request_call"), caption: props.errorText };
+  if (mediaIssue === "unsupported") return { icon: "unsupported", tone: "error", title: t("conversations.video_calls_not_supported"), caption: t("conversations.update_browser_or_open_link") };
   if (mediaIssue === "devices") return {
     icon: "alert",
     tone: "error",
-    title: "Нет доступа к камере и микрофону",
-    caption: "Разрешите доступ к устройствам в настройках браузера и повторите.",
+    title: t("conversations.no_access_camera_microphone"),
+    caption: t("conversations.allow_device_access_browser_settings"),
     actions: [
-      { label: "Повторить проверку", kind: "primary", onClick: onPrepare },
-      { label: "Без видео", kind: "secondary", onClick: onJoin },
+      { label: t("conversations.check_again"), kind: "primary", onClick: onPrepare },
+      { label: t("conversations.without_video"), kind: "secondary", onClick: onJoin },
     ],
   };
   if (connection === "failed") return {
     icon: "alert",
     tone: "error",
-    title: "Не удалось соединиться",
-    caption: "Проверьте интернет-соединение и попробуйте снова.",
-    actions: [{ label: "Повторить", kind: "primary", onClick: onReconnect }],
+    title: t("conversations.could_not_connect"),
+    caption: t("conversations.check_internet_connection_try_again"),
+    actions: [{ label: t("common.try_again"), kind: "primary", onClick: onReconnect }],
   };
   if (!props.call) return undefined;
-  if (props.call.status === "ACCEPTED" || props.call.status === "CONNECTING") return { icon: "spinner", tone: "neutral", title: "Соединяем звонок", caption: "Устанавливаем защищённое соединение…" };
+  if (props.call.status === "ACCEPTED" || props.call.status === "CONNECTING") return { icon: "spinner", tone: "neutral", title: t("conversations.connecting_call"), caption: t("conversations.establishing_secure_connection") };
   const terminal = TERMINAL[props.call.status];
   if (!terminal) return undefined;
-  const duration = props.call.status === "ENDED" && props.call.durationSeconds != null ? `Длительность ${formatDuration(props.call.durationSeconds)}. ` : "";
+  const duration = props.call.status === "ENDED" && props.call.durationSeconds != null ? `${t("time.duration_is", { duration: formatDuration(props.call.durationSeconds) })} ` : "";
   return {
     icon: terminal.icon,
     tone: terminal.tone,
     title: terminal.title,
-    caption: `${duration}${terminal.caption(props.dialog?.name ?? "Клиент")}`,
+    caption: `${duration}${terminal.caption(props.dialog?.name ?? t("conversations.customer"))}`,
     actions: [
       ...(terminal.retry ? [{ label: terminal.retry, kind: "primary" as const, onClick: props.onRetry }] : []),
-      { label: "Закрыть", kind: "secondary" as const, onClick: props.onClose },
+      { label: t("common.close"), kind: "secondary" as const, onClick: props.onClose },
     ],
   };
 }
 
 function subtitleFor(mode: CallViewMode, call: ApiCall | null, status?: CallViewStatus) {
-  if (mode === "ringing") return call?.status === "REQUESTED" ? "Отправляем приглашение" : "Ожидание ответа";
-  if (mode === "precall") return "Проверьте камеру и микрофон";
-  if (mode === "active") return "Активный звонок";
-  if (mode === "reconnecting") return "Переподключение";
-  return status?.title ?? "Соединение";
+  if (mode === "ringing") return call?.status === "REQUESTED" ? t("conversations.sending_invitation") : t("conversations.waiting_answer");
+  if (mode === "precall") return t("conversations.check_camera_microphone");
+  if (mode === "active") return t("conversations.active_call");
+  if (mode === "reconnecting") return t("conversations.reconnecting");
+  return status?.title ?? t("conversations.connecting");
 }
 
 function useElapsed(connectedAt: string | null, active: boolean) {
diff --git a/apps/internal-ui/src/features/conversations/VoiceMessage.tsx b/apps/internal-ui/src/features/conversations/VoiceMessage.tsx
index 0ce7588..81ef2b0 100644
--- a/apps/internal-ui/src/features/conversations/VoiceMessage.tsx
+++ b/apps/internal-ui/src/features/conversations/VoiceMessage.tsx
@@ -3,6 +3,7 @@ import { useEffect, useRef, useState } from "react";
 import { Icon } from "../../shared/icons";
 import { resolveApiUrl } from "../../api/client";
 import { transcribeMessage, type ApiMessage } from "./model";
+import { t } from "../../i18n";
 
 // Голосовое сообщение в ленте (дизайн-базлайн v2, кадр H): плеер с волной,
 // длительность и расшифровка по кнопке (три состояния).
@@ -60,7 +61,7 @@ export function VoiceMessage({ message: incoming }: { message: ApiMessage }) {
       audioRef.current.pause();
       setPlaying(false);
     } else {
-      void audioRef.current.play().catch(() => setErrorText("Не удалось воспроизвести"));
+      void audioRef.current.play().catch(() => setErrorText(t("conversations.could_not_play")));
       setPlaying(true);
     }
   }
@@ -72,7 +73,7 @@ export function VoiceMessage({ message: incoming }: { message: ApiMessage }) {
       setMessage(await transcribeMessage(message.id));
       setShowTranscript(true);
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось расшифровать");
+      setErrorText(error instanceof Error ? error.message : t("conversations.could_not_transcribe"));
     } finally {
       setTranscribing(false);
     }
@@ -84,7 +85,7 @@ export function VoiceMessage({ message: incoming }: { message: ApiMessage }) {
     <div className="voice-message">
       <div className="voice-message-player">
         <button
-          aria-label={playing ? "Пауза" : "Воспроизвести"}
+          aria-label={playing ? t("conversations.pause") : t("conversations.play")}
           className="voice-message-play"
           disabled={!message.audioUrl}
           type="button"
@@ -100,24 +101,23 @@ export function VoiceMessage({ message: incoming }: { message: ApiMessage }) {
         {message.transcriptStatus !== "READY" && !transcribing && message.audioUrl && (
           <button
             className="voice-message-transcribe"
-            title="Расшифровать"
+            title={t("conversations.transcribe")}
             type="button"
             onClick={() => void transcribe()}
           >
-            <Icon name="text" size={13} />Расшифровать
-          </button>
+            <Icon name="text" size={13} />{t("conversations.transcribe")}</button>
         )}
-        {transcribing && <span className="voice-message-busy" title="Расшифровываем…"><i /><i /><i /><em>Расшифровываем…</em></span>}
+        {transcribing && <span className="voice-message-busy" title={t("conversations.transcribing")}><i /><i /><i /><em>{t("conversations.transcribing")}</em></span>}
         <em>{formatDuration(message.durationSeconds ?? 0)}</em>
       </div>
       {message.transcriptStatus === "READY" && message.transcript && showTranscript && (
         <p className="voice-message-transcript">
           {message.transcript}
-          <span className="voice-message-caption">Расшифровка AI · <button className="link" type="button" onClick={() => setShowTranscript(false)}>Скрыть</button></span>
+          <span className="voice-message-caption">{t("conversations.ai_transcript")}<button className="link" type="button" onClick={() => setShowTranscript(false)}>{t("common.hide")}</button></span>
         </p>
       )}
       {message.transcriptStatus === "READY" && !showTranscript && (
-        <span className="voice-message-caption voice-message-show">Расшифровка AI · <button className="link" type="button" onClick={() => setShowTranscript(true)}>Показать</button></span>
+        <span className="voice-message-caption voice-message-show">{t("conversations.ai_transcript")}<button className="link" type="button" onClick={() => setShowTranscript(true)}>{t("common.show")}</button></span>
       )}
       {errorText && <p className="voice-message-error">{errorText}</p>}
     </div>
diff --git a/apps/internal-ui/src/features/conversations/data.ts b/apps/internal-ui/src/features/conversations/data.ts
index 923521a..9b845e8 100644
--- a/apps/internal-ui/src/features/conversations/data.ts
+++ b/apps/internal-ui/src/features/conversations/data.ts
@@ -1,4 +1,5 @@
 import type { ControlMode, DialogMode, StatusInfo } from "./types";
+import { t } from "../../i18n";
 
 export const modeDots: Record<DialogMode, string> = {
   wait: "var(--warning)",
@@ -8,9 +9,9 @@ export const modeDots: Record<DialogMode, string> = {
 };
 
 export function statusFor(mode: ControlMode, assignedOperatorName?: string): StatusInfo {
-  if (mode === "ai") return { label: "AI отвечает", color: "var(--ai)", bg: "var(--ai-bg)", border: "var(--ai-border)", dot: "var(--ai)" };
-  if (mode === "human") return { label: "Ведёте вы", color: "var(--primary-text)", bg: "var(--primary-bg)", border: "var(--primary-border)", dot: "var(--primary)" };
-  if (mode === "assigned") return { label: assignedOperatorName ? `Ведёт ${assignedOperatorName}` : "Ведёт другой сотрудник", color: "var(--n-3)", bg: "var(--n-10)", border: "var(--n-6)", dot: "var(--n-4)" };
-  if (mode === "closed") return { label: "Диалог закрыт", color: "var(--n-3)", bg: "var(--n-9)", border: "var(--n-6)", dot: "var(--n-5)" };
-  return { label: "Ждёт человека", color: "var(--warning-text)", bg: "var(--warning-bg)", border: "var(--warning-border)", dot: "var(--warning)" };
+  if (mode === "ai") return { label: t("conversations.ai_replying"), color: "var(--ai)", bg: "var(--ai-bg)", border: "var(--ai-border)", dot: "var(--ai)" };
+  if (mode === "human") return { label: t("conversations.handling"), color: "var(--primary-text)", bg: "var(--primary-bg)", border: "var(--primary-border)", dot: "var(--primary)" };
+  if (mode === "assigned") return { label: assignedOperatorName ? t("conversations.handled_by_short", { name: assignedOperatorName }) : t("conversations.another_operator_handling"), color: "var(--n-3)", bg: "var(--n-10)", border: "var(--n-6)", dot: "var(--n-4)" };
+  if (mode === "closed") return { label: t("conversations.conversation_closed"), color: "var(--n-3)", bg: "var(--n-9)", border: "var(--n-6)", dot: "var(--n-5)" };
+  return { label: t("conversations.waiting_person"), color: "var(--warning-text)", bg: "var(--warning-bg)", border: "var(--warning-border)", dot: "var(--warning)" };
 }
diff --git a/apps/internal-ui/src/features/conversations/emailContent.ts b/apps/internal-ui/src/features/conversations/emailContent.ts
index 8e9ce9b..477e9e8 100644
--- a/apps/internal-ui/src/features/conversations/emailContent.ts
+++ b/apps/internal-ui/src/features/conversations/emailContent.ts
@@ -1,3 +1,5 @@
+import { t } from "../../i18n";
+
 export type EmailTextParts = {
   latest: string;
   quoted: string;
@@ -44,5 +46,5 @@ export function foldQuotedHtml(html: string): string {
   if (quoteStart < 0) return html;
   const latest = html.slice(0, quoteStart);
   const quoted = html.slice(quoteStart);
-  return `${latest}<details class="email-quoted"><summary>Показать предыдущие сообщения</summary>${quoted}</details>`;
+  return `${latest}<details class="email-quoted"><summary>${t("conversations.show_earlier_messages")}</summary>${quoted}</details>`;
 }
diff --git a/apps/internal-ui/src/features/conversations/model.ts b/apps/internal-ui/src/features/conversations/model.ts
index 2b27e06..23937e2 100644
--- a/apps/internal-ui/src/features/conversations/model.ts
+++ b/apps/internal-ui/src/features/conversations/model.ts
@@ -1,5 +1,6 @@
 import { api, apiUpload } from "../../api/client";
 import type { ChannelKey, ConversationListItem, ControlMode, DialogMode, ListSort } from "./types";
+import { t } from "../../i18n";
 
 // kind: "" — текст, "contact_request" — запрос контакта, "contact" — клиент поделился номером.
 export type ApiMessage = {
@@ -10,6 +11,9 @@ export type ApiMessage = {
   authorAvatarUrl?: string | null;
   kind?: string;
   text: string;
+  // Код системного события: строку сервер уже собрал на языке читателя, код
+  // остаётся интерфейсу для тона строки.
+  systemEvent?: string;
   contentHtml?: string;
   createdAt: string;
   // Голосовое (kind="voice", дизайн-базлайн v2 кадр H).
@@ -114,18 +118,18 @@ export function listTime(iso: string, now = new Date()): string {
   if (sameDay) return date.toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" });
   const yesterday = new Date(now);
   yesterday.setDate(now.getDate() - 1);
-  if (date.toDateString() === yesterday.toDateString()) return "вчера";
+  if (date.toDateString() === yesterday.toDateString()) return t("common.yesterday");
   return date.toLocaleDateString("ru-RU", { day: "numeric", month: "short" }).replace(".", "");
 }
 
 // Таймер ожидания оператора: «6 мин», «1 ч 50 мин» — без слова «ждёт» (решение 4).
 export function waitLabelOf(sinceIso: string, now = new Date()): string {
   const minutes = Math.max(0, Math.round((now.getTime() - new Date(sinceIso).getTime()) / 60000));
-  if (minutes < 60) return `${minutes} мин`;
+  if (minutes < 60) return t("time.minutes_short", { count: minutes });
   const hours = Math.floor(minutes / 60);
-  if (hours >= 24) return `${Math.floor(hours / 24)} д`;
+  if (hours >= 24) return t("time.days_short", { count: Math.floor(hours / 24) });
   const rest = minutes % 60;
-  return rest ? `${hours} ч ${rest} мин` : `${hours} ч`;
+  return rest ? t("time.hours_minutes", { hours, minutes: rest }) : t("time.hours_short", { count: hours });
 }
 const PROVIDER_CHANNEL: Record<string, ChannelKey> = {
   EMAIL: "EMAIL",
@@ -157,13 +161,13 @@ function formatPreviewDuration(totalSeconds: number): string {
 
 function initialsOf(name: string): string {
   const parts = name.trim().split(/\s+/).filter(Boolean);
-  if (parts.length === 0) return "Г";
+  if (parts.length === 0) return t("conversations.g");
   return (parts[0][0] + (parts[1]?.[0] ?? "")).toUpperCase();
 }
 
 export function conversationName(conversation: ApiConversation): string {
-  if (conversation.contact) return conversation.contact.name || `Гость ${conversation.contact.id}`;
-  return "Гость";
+  if (conversation.contact) return conversation.contact.name || t("conversations.guest_number", { id: conversation.contact.id });
+  return t("conversations.guest");
 }
 
 export function toConversationListItem(conversation: ApiConversation): ConversationListItem {
@@ -181,9 +185,9 @@ export function toConversationListItem(conversation: ApiConversation): Conversat
     mode: dialogMode(conversation),
     preview:
       conversation.lastMessage?.kind === "voice"
-        ? `Голосовое сообщение · ${formatPreviewDuration(conversation.lastMessage.durationSeconds ?? 0)}`
+        ? t("conversations.voice_message_duration", { duration: formatPreviewDuration(conversation.lastMessage.durationSeconds ?? 0) })
         : conversation.lastMessage?.kind === "file"
-          ? (isImageAttachment(conversation.lastMessage) ? "Фото" : `Файл · ${conversation.lastMessage.attachmentName || ""}`) + (conversation.lastMessage.text ? ` · ${conversation.lastMessage.text.replace(/\s+/g, " ").slice(0, 60)}` : "")
+          ? (isImageAttachment(conversation.lastMessage) ? t("common.photo") : t("conversations.file_named", { name: conversation.lastMessage.attachmentName || "" })) + (conversation.lastMessage.text ? ` · ${conversation.lastMessage.text.replace(/\s+/g, " ").slice(0, 60)}` : "")
           : conversation.lastMessage?.text.replace(/\s+/g, " ").slice(0, 80) ?? "—",
     time: listTime(conversation.lastActivityAt),
     unread: conversation.pendingCount ?? 0,
diff --git a/apps/internal-ui/src/features/conversations/useConversationCall.ts b/apps/internal-ui/src/features/conversations/useConversationCall.ts
index 761993c..e176c4d 100644
--- a/apps/internal-ui/src/features/conversations/useConversationCall.ts
+++ b/apps/internal-ui/src/features/conversations/useConversationCall.ts
@@ -11,6 +11,7 @@ import {
   type CallAccess,
   type CallKind,
 } from "./model";
+import { t } from "../../i18n";
 
 type Options = {
   conversationId: number | null;
@@ -60,8 +61,8 @@ export function useConversationCall({ conversationId, onConversationChanged }: O
       const active = await fetchActiveCall(conversationId);
       if (active) {
         if (active.kind !== kind) {
-          const activeLabel = active.kind === "AUDIO" ? "аудиозвонок" : "видеозвонок";
-          throw new Error(`Сначала завершите текущий ${activeLabel}`);
+          const activeLabel = active.kind === "AUDIO" ? t("conversations.audio_call_2") : t("conversations.video_call");
+          throw new Error(t("conversations.finish_current_call_first", { kind: activeLabel }));
         }
         setCall(active);
         await ensureAccess(active.id);
@@ -74,7 +75,7 @@ export function useConversationCall({ conversationId, onConversationChanged }: O
     } catch (error) {
       setCall(null);
       setAccess(null);
-      setErrorText(error instanceof Error ? error.message : "Не удалось запросить звонок");
+      setErrorText(error instanceof Error ? error.message : t("conversations.could_not_request_call"));
     } finally {
       setBusy(false);
       setOpen(true);
@@ -88,7 +89,7 @@ export function useConversationCall({ conversationId, onConversationChanged }: O
       onConversationChanged();
       setOpen(false);
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось отменить звонок");
+      setErrorText(error instanceof Error ? error.message : t("conversations.could_not_cancel_call"));
     }
   }, [call, onConversationChanged]);
 
@@ -104,7 +105,7 @@ export function useConversationCall({ conversationId, onConversationChanged }: O
       setAccess(created.access);
       onConversationChanged();
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось запросить звонок");
+      setErrorText(error instanceof Error ? error.message : t("conversations.could_not_request_call"));
     }
   }, [conversationId, onConversationChanged]);
 
diff --git a/apps/internal-ui/src/features/conversations/useConversationHistory.ts b/apps/internal-ui/src/features/conversations/useConversationHistory.ts
index 959ae2d..fe6ecd4 100644
--- a/apps/internal-ui/src/features/conversations/useConversationHistory.ts
+++ b/apps/internal-ui/src/features/conversations/useConversationHistory.ts
@@ -1,6 +1,7 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 
 import { fetchMessages, type ApiMessage } from "./model";
+import { t } from "../../i18n";
 
 // Открытие диалога показывает хвост переписки; вверх история догружается по
 // прокрутке, вниз — дельтой обновления. Целиком лента не запрашивается никогда:
@@ -70,7 +71,7 @@ export function useConversationHistory(
         lastIdRef.current = page.items.length ? page.items[page.items.length - 1].id : 0;
       })
       .catch(() => {
-        if (active && conversationRef.current === conversationId) setErrorText("Не удалось загрузить историю диалога");
+        if (active && conversationRef.current === conversationId) setErrorText(t("conversations.could_not_load_conversation_history"));
       });
     return () => {
       active = false;
@@ -87,7 +88,7 @@ export function useConversationHistory(
       setMessages((current) => mergeNewer(current, page.items));
       setErrorText("");
     } catch {
-      setErrorText("Не удалось обновить историю диалога");
+      setErrorText(t("conversations.could_not_refresh_conversation_history"));
     }
   }, []);
 
@@ -113,7 +114,7 @@ export function useConversationHistory(
         setErrorText("");
       })
       .catch(() => {
-        if (conversationRef.current === id) setErrorText("Не удалось загрузить предыдущие сообщения");
+        if (conversationRef.current === id) setErrorText(t("conversations.could_not_load_earlier_messages"));
       })
       .finally(() => {
         if (conversationRef.current === id) setLoadingOlder(false);
diff --git a/apps/internal-ui/src/features/conversations/useConversationList.ts b/apps/internal-ui/src/features/conversations/useConversationList.ts
index 28f4ac9..39505b7 100644
--- a/apps/internal-ui/src/features/conversations/useConversationList.ts
+++ b/apps/internal-ui/src/features/conversations/useConversationList.ts
@@ -5,6 +5,7 @@ import {
   type ApiConversation,
   type ConversationListQuery,
 } from "./model";
+import { t } from "../../i18n";
 
 // Инбокс — живая лента: сверху приходит окно, вниз оно догружается прокруткой.
 // Обновление перезапрашивает только голову списка (туда попадает вся свежая
@@ -62,7 +63,7 @@ export function useConversationList(
       setLoaded(true);
       setErrorText("");
     } catch {
-      setErrorText("Не удалось обновить список диалогов");
+      setErrorText(t("conversations.could_not_refresh_conversation_list"));
     }
   }, [stableQuery]);
 
@@ -83,7 +84,7 @@ export function useConversationList(
         setErrorText("");
       })
       .catch(() => {
-        if (active) setErrorText("Не удалось загрузить список диалогов");
+        if (active) setErrorText(t("conversations.could_not_load_conversation_list"));
       });
     return () => {
       active = false;
@@ -110,7 +111,7 @@ export function useConversationList(
         setTotal(page.total);
         setErrorText("");
       })
-      .catch(() => setErrorText("Не удалось загрузить следующие диалоги"))
+      .catch(() => setErrorText(t("conversations.could_not_load_more_conversations")))
       .finally(() => {
         loadingMoreRef.current = false;
         setLoadingMore(false);
diff --git a/apps/internal-ui/src/features/conversations/useVoiceRecorder.ts b/apps/internal-ui/src/features/conversations/useVoiceRecorder.ts
index 7809f06..13b64cb 100644
--- a/apps/internal-ui/src/features/conversations/useVoiceRecorder.ts
+++ b/apps/internal-ui/src/features/conversations/useVoiceRecorder.ts
@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from "react";
+import { t } from "../../i18n";
 
 // Запись голосового в композере (дизайн-базлайн v2, кадр H): MediaRecorder,
 // таймер, отмена/отправка. Формат — opus (ogg в Firefox, webm в Chromium).
@@ -67,7 +68,7 @@ export function useVoiceRecorder({ onSend }: { onSend: (audio: Blob, durationSec
             setSeconds(0);
           })
           .catch((error) => {
-            setErrorText(error instanceof Error ? error.message : "Не удалось отправить голосовое");
+            setErrorText(error instanceof Error ? error.message : t("conversations.could_not_send_voice_message"));
             setState("idle");
             setSeconds(0);
           });
@@ -81,7 +82,7 @@ export function useVoiceRecorder({ onSend }: { onSend: (audio: Blob, durationSec
         setSeconds(Math.floor((Date.now() - startedAtRef.current) / 1000));
       }, 250);
     } catch {
-      setErrorText("Нет доступа к микрофону");
+      setErrorText(t("conversations.no_access_microphone"));
     }
   }, [cleanupStream, onSend, state, supported]);
 
diff --git a/apps/internal-ui/src/features/employees/EmployeeCreateDrawer.tsx b/apps/internal-ui/src/features/employees/EmployeeCreateDrawer.tsx
index 6622931..f24f870 100644
--- a/apps/internal-ui/src/features/employees/EmployeeCreateDrawer.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeCreateDrawer.tsx
@@ -4,18 +4,19 @@ import { Icon } from "../../shared/icons";
 import { groupColorOf } from "../conversations/model";
 import type { EmployeeGroup, Role } from "../../types";
 import { createEmployee, type IssuedPassword, type PasswordMode } from "./api";
+import { t } from "../../i18n";
 
 // Новый сотрудник (дизайн-базлайн v2, кадры E5/E6): выезжающая панель 520px,
 // четыре шага — учётные данные · роль · должность и группы · пароль.
 
 const ROLE_OPTIONS: Array<{ value: Extract<Role, "ADMIN" | "EMPLOYEE">; label: string; description: string }> = [
-  { value: "EMPLOYEE", label: "Сотрудник", description: "Работает в чате. Видит диалоги своих групп, диалоги без группы и назначенные ему." },
-  { value: "ADMIN", label: "Администратор", description: "Полный доступ, идентичен владельцу. Единственное отличие владельца — его нельзя удалить." },
+  { value: "EMPLOYEE", label: t("common.operator"), description: t("admin.works_chat_sees_conversations_their") },
+  { value: "ADMIN", label: t("common.administrator"), description: t("admin.full_access_identical_owner_owner") },
 ];
 
 const PASSWORD_OPTIONS: Array<{ value: PasswordMode; label: string; description: string }> = [
-  { value: "mail", label: "Отправить на рабочую почту", description: "Сотрудник получит письмо со ссылкой первого входа. Подходит, когда почта организации настроена и работает." },
-  { value: "show", label: "Сгенерировать и показать мне", description: "Пароль покажется один раз после создания — скопируйте и передайте лично. Нужен, когда письма не доходят или ящик ещё не работает." },
+  { value: "mail", label: t("admin.send_work_email"), description: t("admin.operator_gets_email_with_first") },
+  { value: "show", label: t("admin.generate_show_me"), description: t("admin.password_shown_once_after_creation") },
 ];
 
 export function EmployeeCreateDrawer({ groups, onClose, onCreated }: {
@@ -47,37 +48,37 @@ export function EmployeeCreateDrawer({ groups, onClose, onCreated }: {
       const issued = await createEmployee({ fullName, phone, email, role, positionTitle, groupIds, passwordMode });
       onCreated(issued);
     } catch (reason) {
-      setError(reason instanceof Error ? reason.message : "Ошибка создания");
+      setError(reason instanceof Error ? reason.message : t("admin.creation_failed"));
       setSubmitting(false);
     }
   }
 
   const footerHint = passwordMode === "mail"
-    ? `Пароль первичного доступа отправится на ${email.trim() || "рабочую почту"}`
-    : "Пароль покажем сразу после создания — скопируйте его";
+    ? t("admin.first_password_goes_to", { email: email.trim() || t("admin.work_email") })
+    : t("admin.password_appears_right_after_creation");
 
   return (
     <>
-      <button className="employee-drawer-scrim" type="button" aria-label="Закрыть форму" onClick={onClose} />
-      <aside className="employee-create-drawer" aria-label="Новый сотрудник">
+      <button className="employee-drawer-scrim" type="button" aria-label={t("admin.close_form")} onClick={onClose} />
+      <aside className="employee-create-drawer" aria-label={t("admin.new_operator")}>
         <header>
           <div>
-            <strong>Новый сотрудник</strong>
-            <span>Учётные данные · роль · группы</span>
+            <strong>{t("admin.new_operator")}</strong>
+            <span>{t("admin.credentials_role_groups")}</span>
           </div>
-          <button type="button" aria-label="Закрыть" onClick={onClose}><Icon name="xCircle" size={19} strokeWidth={1.8} /></button>
+          <button type="button" aria-label={t("common.close")} onClick={onClose}><Icon name="xCircle" size={19} strokeWidth={1.8} /></button>
         </header>
 
         <div className="employee-create-body">
-          <CreateStep number="1" title="Учётные данные">
+          <CreateStep number="1" title={t("admin.credentials")}>
             <div className="employee-create-grid">
-              <CreateField label="Имя" value={fullName} onChange={setFullName} placeholder="Имя и фамилия" />
-              <CreateField label="Телефон" value={phone} onChange={setPhone} placeholder="+7 …" />
-              <CreateField className="wide" label="Рабочий email · используется для входа" value={email} onChange={setEmail} placeholder="name@company.ru" mono />
+              <CreateField label={t("common.name")} value={fullName} onChange={setFullName} placeholder={t("admin.first_last_name")} />
+              <CreateField label={t("common.phone")} value={phone} onChange={setPhone} placeholder="+7 …" />
+              <CreateField className="wide" label={t("admin.work_email_used_sign")} value={email} onChange={setEmail} placeholder="name@company.ru" mono />
             </div>
           </CreateStep>
 
-          <CreateStep number="2" title="Роль">
+          <CreateStep number="2" title={t("common.role")}>
             <div className="employee-choice-list">
               {ROLE_OPTIONS.map((option) => (
                 <ChoiceOption
@@ -91,8 +92,8 @@ export function EmployeeCreateDrawer({ groups, onClose, onCreated }: {
             </div>
           </CreateStep>
 
-          <CreateStep number="3" title="Должность и группы">
-            <CreateField className="is-single" label="Должность" value={positionTitle} onChange={setPositionTitle} placeholder="напр. Оператор" />
+          <CreateStep number="3" title={t("admin.position_groups")}>
+            <CreateField className="is-single" label={t("common.position")} value={positionTitle} onChange={setPositionTitle} placeholder={t("admin.e_g_operator")} />
             {groups.length > 0 ? (
               <>
                 <div className="employee-group-picks">
@@ -103,20 +104,20 @@ export function EmployeeCreateDrawer({ groups, onClose, onCreated }: {
                         <i>{active && <Icon name="check" size={11} strokeWidth={3} />}</i>
                         <span>
                           <strong><i className="employee-group-dot" style={{ background: groupColorOf(group.id, group.color) }} />{group.name}</strong>
-                          <small>{group.memberCount} сотр.</small>
+                          <small>{t("admin.member_count", { count: group.memberCount })}</small>
                         </span>
                       </button>
                     );
                   })}
                 </div>
-                <p className="employee-create-note">Без групп сотрудник видит только диалоги без группы. Группы можно изменить позже.</p>
+                <p className="employee-create-note">{t("admin.with_no_groups_operator_sees")}</p>
               </>
             ) : (
-              <p className="employee-create-note">Групп пока нет — сотрудник будет видеть все диалоги. Группы создаются в «Настройках».</p>
+              <p className="employee-create-note">{t("admin.there_no_groups_yet_so")}</p>
             )}
           </CreateStep>
 
-          <CreateStep number="4" title="Пароль первичного доступа">
+          <CreateStep number="4" title={t("admin.first_access_password")}>
             <div className="employee-choice-list">
               {PASSWORD_OPTIONS.map((option) => (
                 <ChoiceOption
@@ -134,9 +135,9 @@ export function EmployeeCreateDrawer({ groups, onClose, onCreated }: {
         <footer>
           <span className={error ? "is-error" : ""}>{error || footerHint}</span>
           <div>
-            <button className="secondary-button" type="button" onClick={onClose}>Отмена</button>
+            <button className="secondary-button" type="button" onClick={onClose}>{t("common.cancel")}</button>
             <button className="primary-button" type="button" disabled={!canSubmit} onClick={() => void submit()}>
-              {submitting ? "Создание" : "Создать сотрудника"}
+              {submitting ? t("admin.creating") : t("admin.create_operator")}
             </button>
           </div>
         </footer>
diff --git a/apps/internal-ui/src/features/employees/EmployeeDetailHeader.tsx b/apps/internal-ui/src/features/employees/EmployeeDetailHeader.tsx
index fbb1330..d1a641a 100644
--- a/apps/internal-ui/src/features/employees/EmployeeDetailHeader.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeDetailHeader.tsx
@@ -3,6 +3,7 @@ import { Icon } from "../../shared/icons";
 import { Avatar } from "../../shared/ui";
 import { BackLink, Button } from "../../shared/ui-controls";
 import { employeeAvatarColor, groupsLabel, roleBadge, statusBadge, type EmployeeForm } from "./model";
+import { t } from "../../i18n";
 
 // Шапка карточки сотрудника (дизайн-базлайн v2, кадры E3/E4): аватар 60px,
 // имя, бейджи роли и статуса, строка «email · должность · группы».
@@ -21,7 +22,7 @@ export function EmployeeDetailHeader({ employee, form, saveEmployee, saving, set
 
   return (
     <>
-      <BackLink label="Все сотрудники" onClick={() => setRoute("employees")} />
+      <BackLink label={t("admin.all_operators")} onClick={() => setRoute("employees")} />
       <header className="employee-head">
         <Avatar employee={employee} background={employeeAvatarColor(employee)} />
         <div className="employee-head-text">
@@ -35,13 +36,13 @@ export function EmployeeDetailHeader({ employee, form, saveEmployee, saving, set
         <div className="employee-head-actions">
           {editable ? (
             <>
-              <Button variant="secondary" type="button" onClick={() => setRoute("employees")}>Отмена</Button>
+              <Button variant="secondary" type="button" onClick={() => setRoute("employees")}>{t("common.cancel")}</Button>
               <Button variant="primary" type="button" icon="save" iconSize={15} disabled={saving} onClick={saveEmployee}>
-                {saving ? "Сохранение" : "Сохранить"}
+                {saving ? t("common.saving") : t("common.save")}
               </Button>
             </>
           ) : (
-            <span className="employee-readonly-label"><Icon name="lock" size={14} strokeWidth={1.8} />Только просмотр</span>
+            <span className="employee-readonly-label"><Icon name="lock" size={14} strokeWidth={1.8} />{t("admin.view_only")}</span>
           )}
         </div>
       </header>
diff --git a/apps/internal-ui/src/features/employees/EmployeeDetailPage.tsx b/apps/internal-ui/src/features/employees/EmployeeDetailPage.tsx
index 7582ee3..a3fc7a3 100644
--- a/apps/internal-ui/src/features/employees/EmployeeDetailPage.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeDetailPage.tsx
@@ -11,6 +11,7 @@ import { EmployeePasswordDialog } from "./EmployeePasswordDialog";
 import { EmployeeSecuritySections } from "./EmployeeSecuritySections";
 import { OwnershipTransferModal } from "./OwnershipTransferModal";
 import { employeeForm, employeeStatusKey, type EmployeeForm } from "./model";
+import { t } from "../../i18n";
 
 // Карточка сотрудника (дизайн-базлайн v2, кадры E3/E4).
 
@@ -37,7 +38,7 @@ export function EmployeeDetailPage({ groups, employeeId, setRoute }: {
 
   useEffect(() => {
     setMessage("");
-    void refresh().catch(() => setMessage("Не удалось загрузить карточку сотрудника"));
+    void refresh().catch(() => setMessage(t("admin.could_not_load_operator_card")));
   }, [refresh]);
 
   function updateForm(field: keyof EmployeeForm, value: string | boolean | number[]) {
@@ -52,7 +53,7 @@ export function EmployeeDetailPage({ groups, employeeId, setRoute }: {
       await api(`/api/v1/employees/${employeeId}/update/`, { method: "POST", body: JSON.stringify(form) });
       await refresh();
     } catch (reason) {
-      setMessage(reason instanceof Error ? reason.message : "Не удалось сохранить изменения");
+      setMessage(reason instanceof Error ? reason.message : t("admin.could_not_save_changes"));
     } finally {
       setSaving(false);
     }
@@ -65,7 +66,7 @@ export function EmployeeDetailPage({ groups, employeeId, setRoute }: {
       await action();
       await refresh();
     } catch (reason) {
-      setMessage(reason instanceof Error ? reason.message : "Не удалось выполнить действие");
+      setMessage(reason instanceof Error ? reason.message : t("common.could_not_complete_action"));
     } finally {
       setBusy(false);
     }
@@ -90,7 +91,7 @@ export function EmployeeDetailPage({ groups, employeeId, setRoute }: {
       {isOwnerCard && (
         <div className="employee-owner-banner">
           <Icon name="lock" size={16} strokeWidth={1.8} />
-          <span>Владельца нельзя удалить, заблокировать или сменить ему роль — единственный путь изменения роли владельца это передача владения.</span>
+          <span>{t("admin.owner_cannot_deleted_blocked_or")}</span>
         </div>
       )}
       {message && <div className="employees-error"><Icon name="alert" size={16} strokeWidth={1.8} />{message}</div>}
diff --git a/apps/internal-ui/src/features/employees/EmployeeDetailRail.tsx b/apps/internal-ui/src/features/employees/EmployeeDetailRail.tsx
index 46b1e3c..540c63b 100644
--- a/apps/internal-ui/src/features/employees/EmployeeDetailRail.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeDetailRail.tsx
@@ -1,21 +1,22 @@
 import type { Employee } from "../../types";
 import { auditItem, formatDate, formatLastLogin, roleBadge, statusBadge } from "./model";
+import { t } from "../../i18n";
 
 // Правая колонка карточки (кадры E3/E4): учётная запись и аудит.
 
 export function EmployeeDetailRail({ employee }: { employee: Employee }) {
   const audit = (employee.auditEvents ?? []).map(auditItem);
   const account = [
-    { label: "Статус", value: statusBadge(employee).text },
-    { label: "Роль", value: roleBadge(employee.role).text },
-    { label: "Создан", value: formatDate(employee.createdAt) },
-    { label: "Последний вход", value: formatLastLogin(employee.lastLogin) },
+    { label: t("common.status"), value: statusBadge(employee).text },
+    { label: t("common.role"), value: roleBadge(employee.role).text },
+    { label: t("admin.created"), value: formatDate(employee.createdAt) },
+    { label: t("admin.last_sign"), value: formatLastLogin(employee.lastLogin) },
   ];
 
   return (
     <aside className="employee-rail">
       <section className="employee-card is-rail">
-        <h3>Учётная запись</h3>
+        <h3>{t("admin.account")}</h3>
         {account.map((row) => (
           <div className="employee-account-row" key={row.label}>
             <small>{row.label}</small>
@@ -24,7 +25,7 @@ export function EmployeeDetailRail({ employee }: { employee: Employee }) {
         ))}
       </section>
       <section className="employee-card is-rail">
-        <h3>Аудит</h3>
+        <h3>{t("common.audit")}</h3>
         {audit.map((item, index) => (
           <div className="employee-audit-row" key={`${item.code}-${index}`}>
             <i style={{ background: item.dot }} />
@@ -34,7 +35,7 @@ export function EmployeeDetailRail({ employee }: { employee: Employee }) {
             </div>
           </div>
         ))}
-        {audit.length === 0 && <p className="employee-create-note">Событий пока нет.</p>}
+        {audit.length === 0 && <p className="employee-create-note">{t("admin.no_events_yet_2")}</p>}
       </section>
     </aside>
   );
diff --git a/apps/internal-ui/src/features/employees/EmployeeIdentitySections.tsx b/apps/internal-ui/src/features/employees/EmployeeIdentitySections.tsx
index 6b5b348..b19b0ab 100644
--- a/apps/internal-ui/src/features/employees/EmployeeIdentitySections.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeIdentitySections.tsx
@@ -2,14 +2,15 @@ import type { Employee, EmployeeGroup, Role } from "../../types";
 import { Icon } from "../../shared/icons";
 import { groupColorOf } from "../conversations/model";
 import type { EmployeeForm } from "./model";
+import { t } from "../../i18n";
 
 // Основные данные · Должность и группы · Системная роль (кадры E3/E4).
 // Владельцу все роли закрыты: роль владельца меняется только передачей владения.
 
 const ROLE_OPTIONS: Array<{ role: Role; label: string; description: string }> = [
-  { role: "OWNER", label: "Владелец", description: "Полный доступ. Ровно один в организации. Изменяется только через передачу владения." },
-  { role: "ADMIN", label: "Администратор", description: "Полный доступ, идентичен владельцу. Единственное отличие владельца — его нельзя удалить." },
-  { role: "EMPLOYEE", label: "Сотрудник", description: "Работает в чате. Видит диалоги своих групп, диалоги без группы и назначенные ему." },
+  { role: "OWNER", label: t("common.owner"), description: t("admin.full_access_exactly_one_per") },
+  { role: "ADMIN", label: t("common.administrator"), description: t("admin.full_access_identical_owner_owner") },
+  { role: "EMPLOYEE", label: t("common.operator"), description: t("admin.works_chat_sees_conversations_their") },
 ];
 
 export function EmployeeIdentitySections({ groups, employee, form, updateForm }: {
@@ -33,18 +34,18 @@ export function EmployeeIdentitySections({ groups, employee, form, updateForm }:
   return (
     <>
       <section className="employee-card">
-        <h3>Основные данные</h3>
+        <h3>{t("admin.main_details")}</h3>
         <div className="employee-field-grid">
-          <EmployeeField label="Имя" value={form.fullName} readOnly={!canProfile} onChange={(value) => updateForm("fullName", value)} />
-          <EmployeeField label="Телефон" value={form.phone} readOnly={!canProfile} onChange={(value) => updateForm("phone", value)} />
-          <EmployeeField className="is-wide" label="Email · используется для входа" value={form.email} readOnly={!canProfile} mono onChange={(value) => updateForm("email", value)} />
+          <EmployeeField label={t("common.name")} value={form.fullName} readOnly={!canProfile} onChange={(value) => updateForm("fullName", value)} />
+          <EmployeeField label={t("common.phone")} value={form.phone} readOnly={!canProfile} onChange={(value) => updateForm("phone", value)} />
+          <EmployeeField className="is-wide" label={t("profile.email_used_sign")} value={form.email} readOnly={!canProfile} mono onChange={(value) => updateForm("email", value)} />
         </div>
       </section>
 
       <section className="employee-card">
-        <h3>Должность и группы</h3>
-        <p>Группа задаёт только видимость диалогов и не выдаёт прав.</p>
-        <EmployeeField className="is-single" label="Должность" value={form.positionTitle} readOnly={!canProfile} placeholder="напр. Оператор" onChange={(value) => updateForm("positionTitle", value)} />
+        <h3>{t("admin.position_groups")}</h3>
+        <p>{t("admin.group_decides_which_conversations_visible")}</p>
+        <EmployeeField className="is-single" label={t("common.position")} value={form.positionTitle} readOnly={!canProfile} placeholder={t("admin.e_g_operator")} onChange={(value) => updateForm("positionTitle", value)} />
         {groups.length > 0 ? (
           <div className="employee-group-picks">
             {groups.map((group) => {
@@ -54,20 +55,20 @@ export function EmployeeIdentitySections({ groups, employee, form, updateForm }:
                   <i>{active && <Icon name="check" size={11} strokeWidth={3} />}</i>
                   <span>
                     <strong><i className="employee-group-dot" style={{ background: groupColorOf(group.id, group.color) }} />{group.name}</strong>
-                    <small>{group.memberCount} сотр.</small>
+                    <small>{t("admin.member_count", { count: group.memberCount })}</small>
                   </span>
                 </button>
               );
             })}
           </div>
         ) : (
-          <p className="employee-create-note">Групп пока нет — все сотрудники видят все диалоги.</p>
+          <p className="employee-create-note">{t("admin.there_no_groups_yet_so_2")}</p>
         )}
       </section>
 
       <section className="employee-card">
-        <h3>Системная роль</h3>
-        <p>{isOwner ? "Роль владельца меняется только через передачу владения." : "OWNER и ADMIN идентичны по правам; EMPLOYEE работает только в чате."}</p>
+        <h3>{t("admin.system_role")}</h3>
+        <p>{isOwner ? t("admin.owner_s_role_changes_only") : t("admin.owner_admin_have_identical_rights")}</p>
         <div className="employee-choice-list">
           {ROLE_OPTIONS.map((option) => {
             const active = form.role === option.role;
diff --git a/apps/internal-ui/src/features/employees/EmployeePasswordDialog.tsx b/apps/internal-ui/src/features/employees/EmployeePasswordDialog.tsx
index d905aa6..32e62f9 100644
--- a/apps/internal-ui/src/features/employees/EmployeePasswordDialog.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeePasswordDialog.tsx
@@ -5,13 +5,14 @@ import { Avatar } from "../../shared/ui";
 import { CopyButton } from "../../shared/ui-controls";
 import { resetEmployeePassword, type IssuedPassword } from "./api";
 import { employeeAvatarColor } from "./model";
+import { t } from "../../i18n";
 
 // Пароль первичного доступа (дизайн-базлайн v2, кадры E7/E8). Показывается один
 // раз: сервер отдал его в ответе и хранит только хеш.
 
 const TITLES = {
-  created: { title: "Сотрудник создан", sub: "Пароль сгенерирован и показан один раз — скопируйте его сейчас." },
-  reset: { title: "Пароль сброшен", sub: "Активные сессии сотрудника завершены, при первом входе он задаст свой пароль." },
+  created: { title: t("admin.operator_created"), sub: t("admin.password_was_generated_shown_once") },
+  reset: { title: t("admin.password_reset"), sub: t("admin.operator_s_active_sessions_were") },
 } as const;
 
 export function EmployeePasswordDialog({ issued, onClose }: { issued: IssuedPassword; onClose: () => void }) {
@@ -29,7 +30,7 @@ export function EmployeePasswordDialog({ issued, onClose }: { issued: IssuedPass
       await resetEmployeePassword(employee.id, "mail");
       setSent(true);
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось отправить письмо");
+      setError(caught instanceof Error ? caught.message : t("admin.could_not_send_email"));
     } finally {
       setSending(false);
     }
@@ -54,28 +55,28 @@ export function EmployeePasswordDialog({ issued, onClose }: { issued: IssuedPass
             </span>
           </div>
           <label className="employee-password-field">
-            <span>Пароль первичного доступа</span>
+            <span>{t("admin.first_access_password")}</span>
             <span className="employee-password-value">
               <code>{masked ? "•".repeat(issued.password.length) : issued.password}</code>
-              <button className="employee-password-mask" type="button" title={masked ? "Показать" : "Скрыть"} aria-label={masked ? "Показать" : "Скрыть"} onClick={() => setMasked((value) => !value)}>
+              <button className="employee-password-mask" type="button" title={masked ? t("common.show") : t("common.hide")} aria-label={masked ? t("common.show") : t("common.hide")} onClick={() => setMasked((value) => !value)}>
                 <Icon name={masked ? "eyeOff" : "eye"} size={16} strokeWidth={1.8} />
               </button>
-              <CopyButton className="employee-password-copy" label="Копировать" value={issued.password} />
+              <CopyButton className="employee-password-copy" label={t("common.copy")} value={issued.password} />
             </span>
           </label>
           <div className="employee-password-warning">
             <Icon name="warning" size={17} strokeWidth={1.9} />
-            <p>Пароль показывается один раз и на сервере не хранится в открытом виде. Скопируйте и передайте сотруднику лично — при первом входе он сменит его сам. Если окно закрыть, останется только сбросить пароль заново.</p>
+            <p>{t("admin.password_shown_once_not_stored")}</p>
           </div>
           <button className="employee-password-mail" type="button" disabled={sending || sent} onClick={() => void sendByMail()}>
             <Icon name="mail" size={14} strokeWidth={1.8} />
-            {sent ? "Письмо отправлено" : sending ? "Отправка…" : "Отправить на почту вместо этого"}
+            {sent ? t("admin.email_sent") : sending ? t("common.sending") : t("admin.send_by_email_instead")}
           </button>
           {error && <div className="employees-error"><Icon name="alert" size={16} strokeWidth={1.8} />{error}</div>}
         </div>
         <footer>
-          <small>Действие записано в аудит</small>
-          <button className="primary-button employee-dialog-primary" type="button" onClick={onClose}>Скопировал, закрыть</button>
+          <small>{t("admin.action_recorded_audit_log")}</small>
+          <button className="primary-button employee-dialog-primary" type="button" onClick={onClose}>{t("admin.copied_close")}</button>
         </footer>
       </section>
     </div>
diff --git a/apps/internal-ui/src/features/employees/EmployeeSecuritySections.tsx b/apps/internal-ui/src/features/employees/EmployeeSecuritySections.tsx
index 321a142..2ba9fe9 100644
--- a/apps/internal-ui/src/features/employees/EmployeeSecuritySections.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeSecuritySections.tsx
@@ -2,6 +2,7 @@ import { Icon } from "../../shared/icons";
 import { SwitchButton } from "../../shared/form-controls";
 import type { Employee } from "../../types";
 import { formatDate, type EmployeeForm } from "./model";
+import { t } from "../../i18n";
 
 // Статус и безопасность · Опасная зона (кадры E3/E4). У владельца единственное
 // опасное действие — передача владения: заблокировать или удалить его нельзя.
@@ -20,57 +21,56 @@ export function EmployeeSecuritySections({ blocked, employee, form, busy, update
   const permissions = employee.permissions;
   const isOwner = employee.role === "OWNER";
   const canBlock = blocked ? permissions?.canUnblock : permissions?.canBlock;
-  const sessions = employee.activeSessionCount === undefined ? "—" : `${employee.activeSessionCount} устройств`;
+  const sessions = employee.activeSessionCount === undefined ? "—" : t("admin.active_devices", { count: employee.activeSessionCount });
 
   return (
     <>
       <section className="employee-card">
-        <h3 className="is-tight">Статус и безопасность</h3>
+        <h3 className="is-tight">{t("admin.status_security")}</h3>
         <div className="employee-security-row">
           <div>
-            <strong>Пароль</strong>
-            <small>Последняя смена: {formatDate(employee.passwordChangedAt)} · новый можно отправить письмом или показать и скопировать</small>
+            <strong>{t("common.password")}</strong>
+            <small>{t("admin.last_password_change", { date: formatDate(employee.passwordChangedAt) })}</small>
           </div>
-          <button className="employee-security-action" type="button" disabled={busy || !permissions?.canResetPassword} onClick={onResetPassword}>Сбросить пароль</button>
+          <button className="employee-security-action" type="button" disabled={busy || !permissions?.canResetPassword} onClick={onResetPassword}>{t("admin.reset_password")}</button>
         </div>
         <div className="employee-security-row">
           <div>
-            <strong>Двухфакторная аутентификация (TOTP)</strong>
-            <small>{form.totpEnabled ? "Включена · требуется при каждом входе" : "Отключена для этого сотрудника"}</small>
+            <strong>{t("admin.two_factor_authentication_totp")}</strong>
+            <small>{form.totpEnabled ? t("admin.required_at_every_sign") : t("admin.off_operator")}</small>
           </div>
-          <SwitchButton checked={form.totpEnabled} className="ui-switch is-large" label="Переключить TOTP" disabled={!permissions?.canUpdateProfile} onClick={() => updateForm("totpEnabled", !form.totpEnabled)} />
+          <SwitchButton checked={form.totpEnabled} className="ui-switch is-large" label={t("admin.toggle_totp")} disabled={!permissions?.canUpdateProfile} onClick={() => updateForm("totpEnabled", !form.totpEnabled)} />
         </div>
         <div className="employee-security-row is-last">
           <div>
-            <strong>Активные сессии</strong>
+            <strong>{t("common.active_sessions")}</strong>
             <small>{sessions}</small>
           </div>
-          <button className="employee-security-action" type="button" disabled={busy || !permissions?.canTerminateSessions} onClick={onTerminateSessions}>Завершить все</button>
+          <button className="employee-security-action" type="button" disabled={busy || !permissions?.canTerminateSessions} onClick={onTerminateSessions}>{t("admin.end_all")}</button>
         </div>
       </section>
 
       {(isOwner ? permissions?.canTransferOwnership : canBlock) && (
         <section className="employee-danger">
-          <h3>Опасная зона</h3>
+          <h3>{t("admin.danger_zone")}</h3>
           {isOwner ? (
             <div>
-              <strong>Передача владения</strong>
-              <p>Владение передаётся только администратору: у него уже полный доступ, и после передачи он получит защищённые действия владельца. Операция атомарна, аудируется и требует подтверждения.</p>
+              <strong>{t("admin.ownership_transfer")}</strong>
+              <p>{t("admin.ownership_passes_administrator_only_they")}</p>
               <button type="button" disabled={busy} onClick={onTransferOwnership}>
-                <Icon name="transfer" size={14} strokeWidth={1.8} />Передать владение
-              </button>
-              <small>Владельца нельзя заблокировать или удалить, поэтому других опасных действий на его карточке нет.</small>
+                <Icon name="transfer" size={14} strokeWidth={1.8} />{t("admin.transfer_ownership")}</button>
+              <small>{t("admin.owner_cannot_blocked_or_deleted")}</small>
             </div>
           ) : (
             <div>
-              <strong>Блокировка доступа</strong>
+              <strong>{t("admin.access_block")}</strong>
               <p>
                 {blocked
-                  ? "Сотрудник заблокирован и не может войти. Разблокировка восстановит доступ по активным назначениям."
-                  : "Немедленно завершит все сессии и прекратит HTTP и realtime actions. Аудит и авторство сохраняются. Требует подтверждения."}
+                  ? t("admin.operator_blocked_cannot_sign_unblocking")
+                  : t("admin.ends_every_session_immediately_stops")}
               </p>
               <button type="button" disabled={busy} onClick={onToggleBlock}>
-                <Icon name="lock" size={14} strokeWidth={1.8} />{blocked ? "Разблокировать сотрудника" : "Заблокировать сотрудника"}
+                <Icon name="lock" size={14} strokeWidth={1.8} />{blocked ? t("admin.unblock_operator") : t("admin.block_operator")}
               </button>
             </div>
           )}
diff --git a/apps/internal-ui/src/features/employees/EmployeeTable.tsx b/apps/internal-ui/src/features/employees/EmployeeTable.tsx
index eba32af..c5271c1 100644
--- a/apps/internal-ui/src/features/employees/EmployeeTable.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeeTable.tsx
@@ -5,6 +5,7 @@ import { Icon } from "../../shared/icons";
 import { Avatar, EmptyState } from "../../shared/ui";
 import { groupColorOf } from "../conversations/model";
 import { employeeAvatarColor, formatLastLogin, roleAccessLabel, roleBadge, statusBadge } from "./model";
+import { t } from "../../i18n";
 
 // Таблица сотрудников (дизайн-базлайн v2, «Сотрудники Baseline», кадры E1/E2):
 // сотрудник · роль · должность · группы · доступ · статус · последний вход · ⋯.
@@ -33,13 +34,13 @@ export function EmployeeTable({
   return (
     <div className="employees-table">
       <div className="employees-thead">
-        <span>Сотрудник</span>
-        <span>Роль</span>
-        <span>Должность</span>
-        <span>Группы</span>
-        <span>Доступ</span>
-        <span>Статус</span>
-        <span>Последний вход</span>
+        <span>{t("common.operator")}</span>
+        <span>{t("common.role")}</span>
+        <span>{t("common.position")}</span>
+        <span>{t("common.groups")}</span>
+        <span>{t("admin.access")}</span>
+        <span>{t("common.status")}</span>
+        <span>{t("admin.last_sign")}</span>
         <span />
       </div>
       {employees.map((employee) => (
@@ -55,10 +56,10 @@ export function EmployeeTable({
           key={employee.id}
         />
       ))}
-      {!employees.length && <EmptyState title="Сотрудники не найдены" />}
+      {!employees.length && <EmptyState title={t("admin.no_operators_found")} />}
       <div className="employees-foot">
-        <small>Показано {employees.length} из {total}</small>
-        <small>Группа задаёт только видимость диалогов и не выдаёт прав</small>
+        <small>{t("common.shown_of", { shown: employees.length, total })}</small>
+        <small>{t("admin.group_decides_which_conversations_visible_2")}</small>
       </div>
     </div>
   );
@@ -82,16 +83,16 @@ function EmployeeRow({ employee, groups, menuOpen, onBlock, onResetPassword, onT
   // Кадр E2: карточка · сессии · пароль · разделитель · блокировка.
   // Передачи владения в меню строки нет — она только в опасной зоне владельца.
   const menuItems = [
-    { key: "open", label: <button type="button" onClick={open}><Icon name="external" size={15} />Открыть карточку</button> },
-    { key: "sessions", disabled: !permissions?.canTerminateSessions, label: <button type="button" onClick={() => act(() => onTerminateSessions(employee))}><Icon name="logout" size={15} />Завершить сессии</button> },
-    { key: "password", disabled: !permissions?.canResetPassword, label: <button type="button" onClick={() => act(() => onResetPassword(employee))}><Icon name="lock" size={15} />Сбросить пароль</button> },
+    { key: "open", label: <button type="button" onClick={open}><Icon name="external" size={15} />{t("admin.open_card")}</button> },
+    { key: "sessions", disabled: !permissions?.canTerminateSessions, label: <button type="button" onClick={() => act(() => onTerminateSessions(employee))}><Icon name="logout" size={15} />{t("admin.end_sessions")}</button> },
+    { key: "password", disabled: !permissions?.canResetPassword, label: <button type="button" onClick={() => act(() => onResetPassword(employee))}><Icon name="lock" size={15} />{t("admin.reset_password")}</button> },
     { type: "divider" as const },
     {
       key: "block",
       disabled: employee.isBlocked ? !permissions?.canUnblock : !permissions?.canBlock,
       label: (
         <button className={employee.isBlocked ? "success" : "danger"} type="button" onClick={() => act(() => onBlock(employee))}>
-          <Icon name="lock" size={15} />{employee.isBlocked ? "Разблокировать" : "Заблокировать"}
+          <Icon name="lock" size={15} />{employee.isBlocked ? t("admin.unblock") : t("admin.block")}
         </button>
       ),
     },
@@ -110,7 +111,7 @@ function EmployeeRow({ employee, groups, menuOpen, onBlock, onResetPassword, onT
       <span className="employees-position">{employee.positionTitle}</span>
       <div className="employees-groups">
         {employee.groups.length === 0
-          ? <span className="employees-nogroup">Без группы</span>
+          ? <span className="employees-nogroup">{t("common.no_group")}</span>
           : employee.groups.map((group) => (
             <span className="employees-group" key={group.id}>
               <i style={{ background: groupColorOf(group.id, groups.find((item) => item.id === group.id)?.color) }} />
@@ -122,7 +123,7 @@ function EmployeeRow({ employee, groups, menuOpen, onBlock, onResetPassword, onT
       <b className="employees-badge has-dot" style={{ background: status.bg, color: status.color }}><i />{status.text}</b>
       <span className="employees-login">{formatLastLogin(employee.lastLogin)}</span>
       <Dropdown menu={{ items: menuItems }} open={menuOpen} onOpenChange={(next) => setMenuId(next ? employee.id : null)} trigger={["click"]} overlayClassName="app-dropdown is-employee-menu">
-        <button className={`employees-row-menu ${menuOpen ? "is-open" : ""}`} type="button" aria-label={`Действия: ${employee.fullName || employee.email}`} title="Действия" onClick={(event) => event.stopPropagation()}>
+        <button className={`employees-row-menu ${menuOpen ? "is-open" : ""}`} type="button" aria-label={t("common.actions_for", { name: employee.fullName || employee.email })} title={t("common.actions")} onClick={(event) => event.stopPropagation()}>
           <Icon name="more" size={16} />
         </button>
       </Dropdown>
diff --git a/apps/internal-ui/src/features/employees/EmployeesFilters.tsx b/apps/internal-ui/src/features/employees/EmployeesFilters.tsx
index 966f0c2..2968433 100644
--- a/apps/internal-ui/src/features/employees/EmployeesFilters.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeesFilters.tsx
@@ -4,6 +4,7 @@ import { Segmented } from "../../shared/ui";
 import { FilterDropdown, SearchInput } from "../../shared/ui-controls";
 import type { EmployeeGroup } from "../../types";
 import type { EmployeeRoleFilter } from "./model";
+import { t } from "../../i18n";
 
 // Фильтры списка сотрудников (кадры E1/E2): поиск · роль · группа · «Сбросить».
 // «Сбросить» подсвечивается акцентом, когда фильтры отличаются от исходных.
@@ -32,19 +33,19 @@ export function EmployeesFilters({
   const group = groups.find((item) => item.id === groupId) ?? null;
   return (
     <div className="employees-filters">
-      <SearchInput className="employees-search" value={query} onChange={setQuery} hotkey="/" placeholder="Поиск по имени, email, должности…" />
+      <SearchInput className="employees-search" value={query} onChange={setQuery} hotkey="/" placeholder={t("admin.search_by_name_email_or")} />
       <div className="employees-filter-group">
-        <span>Роль</span>
-        <Segmented value={role} setValue={setRole} items={[["all", "Все"], ["OWNER", "Владелец"], ["ADMIN", "Администратор"], ["EMPLOYEE", "Сотрудник"]]} />
+        <span>{t("common.role")}</span>
+        <Segmented value={role} setValue={setRole} items={[["all", t("common.all")], ["OWNER", t("common.owner")], ["ADMIN", t("common.administrator")], ["EMPLOYEE", t("common.operator")]]} />
       </div>
       {groups.length > 0 && (
         <div className="employees-filter-group">
-          <span>Группа</span>
+          <span>{t("common.group")}</span>
           <FilterDropdown
             className="employees-group-filter"
-            label={group ? group.name : "Все"}
+            label={group ? group.name : t("common.all")}
             open={groupOpen}
-            options={[{ value: "all", label: "Все" }, ...groups.map((item) => ({ value: String(item.id), label: item.name }))]}
+            options={[{ value: "all", label: t("common.all") }, ...groups.map((item) => ({ value: String(item.id), label: item.name }))]}
             selected={groupId === "all" ? [] : [String(groupId)]}
             onOpenChange={setGroupOpen}
             onSelect={(value) => setGroupId(value === "all" ? "all" : Number(value))}
@@ -52,7 +53,7 @@ export function EmployeesFilters({
         </div>
       )}
       <div className="employees-filters-spacer" />
-      <button className={`employees-reset ${dirty ? "is-dirty" : ""}`} type="button" onClick={resetFilters}>Сбросить</button>
+      <button className={`employees-reset ${dirty ? "is-dirty" : ""}`} type="button" onClick={resetFilters}>{t("common.reset")}</button>
     </div>
   );
 }
diff --git a/apps/internal-ui/src/features/employees/EmployeesListPage.tsx b/apps/internal-ui/src/features/employees/EmployeesListPage.tsx
index 50f7b72..02bc618 100644
--- a/apps/internal-ui/src/features/employees/EmployeesListPage.tsx
+++ b/apps/internal-ui/src/features/employees/EmployeesListPage.tsx
@@ -13,6 +13,7 @@ import { EmployeeTable } from "./EmployeeTable";
 import { EmployeesFilters } from "./EmployeesFilters";
 import { blockEmployee, fetchEmployees, resetEmployeePassword, terminateEmployeeSessions, type IssuedPassword } from "./api";
 import type { EmployeeRoleFilter } from "./model";
+import { t } from "../../i18n";
 
 // Список сотрудников (дизайн-базлайн v2, «Сотрудники Baseline», кадры E1/E2).
 // Страницу, фильтры и поиск считает сервер: список растёт вместе с компанией.
@@ -38,7 +39,7 @@ export function EmployeesPage({ groups, openEmployee, user }: {
     [groupId, role, settledQuery],
   );
   const load = useCallback((page: number) => fetchEmployees(filters, page), [filters]);
-  const employees = usePagedResource(load, filters, "Не удалось загрузить сотрудников");
+  const employees = usePagedResource(load, filters, t("admin.could_not_load_operators"));
 
   function resetFilters() {
     setQuery(""); setRole("all"); setGroupId("all"); setMenuId(null);
@@ -50,7 +51,7 @@ export function EmployeesPage({ groups, openEmployee, user }: {
       await action();
       await employees.reload();
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось выполнить действие");
+      setError(caught instanceof Error ? caught.message : t("common.could_not_complete_action"));
     }
   }
 
@@ -58,11 +59,11 @@ export function EmployeesPage({ groups, openEmployee, user }: {
     <div className="employees-page">
       <header className="employees-header">
         <div>
-          <h2>Сотрудники</h2>
-          <p>Роли и группы · показано <b>{employees.items.length}</b> из {employees.total}</p>
+          <h2>{t("common.operators")}</h2>
+          <p>{t("admin.roles_groups_shown", { shown: employees.items.length, total: employees.total })}</p>
         </div>
         {canManage && (
-          <Button className="employees-create" variant="primary" icon="team" iconSize={16} onClick={() => setCreateOpen(true)}>Добавить сотрудника</Button>
+          <Button className="employees-create" variant="primary" icon="team" iconSize={16} onClick={() => setCreateOpen(true)}>{t("admin.add_operator")}</Button>
         )}
       </header>
 
diff --git a/apps/internal-ui/src/features/employees/OwnershipTransferModal.tsx b/apps/internal-ui/src/features/employees/OwnershipTransferModal.tsx
index ebf6b5d..92a7afe 100644
--- a/apps/internal-ui/src/features/employees/OwnershipTransferModal.tsx
+++ b/apps/internal-ui/src/features/employees/OwnershipTransferModal.tsx
@@ -8,13 +8,14 @@ import { useDebounced } from "../../shared/useDebounced";
 import type { Employee, Role } from "../../types";
 import { fetchOwner, fetchOwnershipCandidates } from "./api";
 import { employeeAvatarColor, roleBadge } from "./model";
+import { t } from "../../i18n";
 
 // Передача владения (дизайн-базлайн v2, кадр E9). Кандидаты — только активные
 // администраторы: чтобы передать сотруднику, его сначала делают админом.
 
 const PREVIOUS_ROLES: Array<{ value: Extract<Role, "ADMIN" | "EMPLOYEE">; label: string }> = [
-  { value: "ADMIN", label: "Администратор" },
-  { value: "EMPLOYEE", label: "Сотрудник" },
+  { value: "ADMIN", label: t("common.administrator") },
+  { value: "EMPLOYEE", label: t("common.operator") },
 ];
 
 export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
@@ -49,7 +50,7 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
         ));
       })
       .catch(() => {
-        if (active) setError("Не удалось загрузить кандидатов");
+        if (active) setError(t("admin.could_not_load_candidates"));
       });
     return () => {
       active = false;
@@ -70,19 +71,19 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
       });
       window.location.reload();
     } catch (reason) {
-      setError(reason instanceof Error ? reason.message : "Ошибка передачи владения");
+      setError(reason instanceof Error ? reason.message : t("admin.ownership_transfer_failed"));
       setSending(false);
     }
   }
 
   return (
     <div className="employee-dialog-scrim">
-      <section className="employee-transfer-dialog" role="dialog" aria-label="Передача владения">
+      <section className="employee-transfer-dialog" role="dialog" aria-label={t("admin.ownership_transfer")}>
         <header>
           <i><Icon name="transfer" size={21} strokeWidth={1.9} /></i>
           <div>
-            <h2>Передача владения</h2>
-            <p>Атомарная операция · в организации остаётся ровно один владелец</p>
+            <h2>{t("admin.ownership_transfer")}</h2>
+            <p>{t("admin.atomic_operation_organization_keeps_exactly")}</p>
           </div>
         </header>
 
@@ -90,17 +91,17 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
           {(hasMore || query) && (
             <SearchInput
               className="employee-transfer-search"
-              placeholder="Имя, почта или должность"
+              placeholder={t("admin.name_email_or_position")}
               value={query}
               onChange={setQuery}
             />
           )}
           {candidates.length === 0 ? (
-            <p className="employee-create-note">Активных администраторов нет. Чтобы передать владение сотруднику, сначала сделайте его администратором.</p>
+            <p className="employee-create-note">{t("admin.there_no_active_administrators_transfer")}</p>
           ) : (
             <>
               <label className="employee-field is-single">
-                <span>Новый владелец · только администраторы</span>
+                <span>{t("admin.new_owner_administrators_only")}</span>
                 <span className="employee-transfer-select">
                   <select value={targetId === null ? "" : String(targetId)} onChange={(event) => setTargetId(Number(event.target.value))}>
                     {candidates.map((employee) => (
@@ -111,7 +112,7 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
                   </select>
                   <Icon name="chevron" size={14} strokeWidth={1.8} />
                 </span>
-                <small className="employee-transfer-note">В списке только активные администраторы. Чтобы передать владение сотруднику, сначала сделайте его администратором.</small>
+                <small className="employee-transfer-note">{t("admin.list_holds_active_administrators_only")}</small>
               </label>
 
               <div className="employee-transfer-pair">
@@ -119,7 +120,7 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
                   <Avatar employee={owner} background={employeeAvatarColor(owner)} />
                   <span>
                     <strong>{owner.fullName || owner.email}</strong>
-                    <small>Владелец</small>
+                    <small>{t("common.owner")}</small>
                   </span>
                 </div>
                 <Icon name="arrow" size={20} strokeWidth={1.8} />
@@ -127,13 +128,13 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
                   {target && <Avatar employee={target} background={employeeAvatarColor(target)} />}
                   <span>
                     <strong>{target?.fullName || target?.email}</strong>
-                    <small className="is-accent">→ Владелец</small>
+                    <small className="is-accent">{t("admin.owner")}</small>
                   </span>
                 </div>
               </div>
 
               <div className="employee-transfer-role">
-                <span>Новая роль прежнего владельца</span>
+                <span>{t("admin.former_owner_s_new_role")}</span>
                 <div>
                   {PREVIOUS_ROLES.map((option) => (
                     <button
@@ -151,12 +152,12 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
 
               <div className="employee-password-warning">
                 <Icon name="warning" size={17} strokeWidth={1.9} />
-                <p>Новый владелец получит полный доступ. Вы потеряете права владельца, включая передачу владения и управление администраторами. Операция аудируется и необратима без повторной передачи.</p>
+                <p>{t("admin.new_owner_gains_full_access")}</p>
               </div>
 
               <button className="employee-transfer-confirm" type="button" aria-pressed={confirmed} onClick={() => setConfirmed((value) => !value)}>
                 <i>{confirmed && <Icon name="check" size={12} strokeWidth={3} />}</i>
-                <span>Я понимаю последствия и подтверждаю передачу владения организацией.</span>
+                <span>{t("admin.i_understand_consequences_confirm_transfer")}</span>
               </button>
 
               {error && <div className="employees-error"><Icon name="alert" size={16} strokeWidth={1.8} />{error}</div>}
@@ -165,9 +166,9 @@ export function OwnershipTransferModal({ onClose }: { onClose: () => void }) {
         </div>
 
         <footer>
-          <button className="secondary-button" type="button" onClick={onClose}>Отмена</button>
+          <button className="secondary-button" type="button" onClick={onClose}>{t("common.cancel")}</button>
           <button className="employee-transfer-submit" type="button" disabled={!confirmed || !target || sending} onClick={() => void transfer()}>
-            {sending ? "Передача…" : "Передать владение"}
+            {sending ? t("admin.transferring") : t("admin.transfer_ownership")}
           </button>
         </footer>
       </section>
diff --git a/apps/internal-ui/src/features/employees/model.ts b/apps/internal-ui/src/features/employees/model.ts
index 7817b72..5b84ac9 100644
--- a/apps/internal-ui/src/features/employees/model.ts
+++ b/apps/internal-ui/src/features/employees/model.ts
@@ -1,5 +1,6 @@
 import { shortDateYear } from "../../shared/utils";
 import type { Employee, EmployeeAuditEvent, Role } from "../../types";
+import { t } from "../../i18n";
 
 export type EmployeeStatus = "active" | "blocked" | "invited";
 export type EmployeeRoleFilter = "all" | Role;
@@ -15,30 +16,30 @@ export type EmployeeForm = {
 };
 
 const AUDIT_LABELS: Record<string, string> = {
-  "identity.employee_blocked": "Сотрудник заблокирован",
-  "identity.employee_created": "Сотрудник создан",
-  "identity.employee_password_reset": "Пароль сотрудника сброшен",
-  "identity.employee_groups_changed": "Изменены группы сотрудника",
-  "identity.employee_role_changed": "Изменена системная роль",
-  "identity.employee_sessions_terminated": "Активные сессии завершены",
-  "identity.employee_unblocked": "Сотрудник разблокирован",
-  "identity.employee_updated": "Данные сотрудника изменены",
-  "identity.ownership_transferred": "Передано владение организацией",
+  "identity.employee_blocked": t("admin.operator_blocked"),
+  "identity.employee_created": t("admin.operator_created"),
+  "identity.employee_password_reset": t("admin.operator_password_reset"),
+  "identity.employee_groups_changed": t("admin.operator_groups_changed"),
+  "identity.employee_role_changed": t("admin.system_role_changed"),
+  "identity.employee_sessions_terminated": t("admin.active_sessions_ended"),
+  "identity.employee_unblocked": t("admin.operator_unblocked"),
+  "identity.employee_updated": t("admin.operator_details_changed"),
+  "identity.ownership_transferred": t("admin.organization_ownership_transferred"),
 };
 
 // Бейджи роли и статуса (дизайн-базлайн v2, «Сотрудники Baseline», таблицы
 // ROLE и STATUS): владелец — акцентом, администратор — цветом AI, сотрудник —
 // нейтральный; статус — полутон своего цвета с точкой.
 const ROLE_BADGE: Record<Role, { text: string; bg: string; color: string }> = {
-  OWNER: { text: "Владелец", bg: "var(--primary-bg)", color: "var(--primary-text)" },
-  ADMIN: { text: "Администратор", bg: "color-mix(in srgb, var(--ai) 14%, var(--surface-card))", color: "var(--ai)" },
-  EMPLOYEE: { text: "Сотрудник", bg: "var(--n-9)", color: "var(--n-3)" },
+  OWNER: { text: t("common.owner"), bg: "var(--primary-bg)", color: "var(--primary-text)" },
+  ADMIN: { text: t("common.administrator"), bg: "color-mix(in srgb, var(--ai) 14%, var(--surface-card))", color: "var(--ai)" },
+  EMPLOYEE: { text: t("common.operator"), bg: "var(--n-9)", color: "var(--n-3)" },
 };
 
 const STATUS_BADGE: Record<EmployeeStatus, { text: string; bg: string; color: string }> = {
-  active: { text: "Активен", bg: "var(--success-bg)", color: "var(--success-text)" },
-  invited: { text: "Приглашён", bg: "var(--warning-bg)", color: "var(--warning-text)" },
-  blocked: { text: "Заблокирован", bg: "var(--error-bg)", color: "var(--error-text)" },
+  active: { text: t("shared.active"), bg: "var(--success-bg)", color: "var(--success-text)" },
+  invited: { text: t("shared.invited"), bg: "var(--warning-bg)", color: "var(--warning-text)" },
+  blocked: { text: t("shared.blocked"), bg: "var(--error-bg)", color: "var(--error-text)" },
 };
 
 // Цвет аватара без фото — по порядку сотрудников, как в касте дизайн-базлайна;
@@ -78,13 +79,13 @@ export function employeeForm(employee: Employee): EmployeeForm {
 }
 
 export function groupsLabel(employee: Employee) {
-  if (!employee.groups.length) return "Без группы";
+  if (!employee.groups.length) return t("common.no_group");
   return employee.groups.map((group) => group.name).join(", ");
 }
 
 export function roleAccessLabel(employee: Employee) {
-  if (employee.role === "OWNER" || employee.role === "ADMIN") return "Полный доступ";
-  return "Только чат";
+  if (employee.role === "OWNER" || employee.role === "ADMIN") return t("common.full_access");
+  return t("admin.chat_only");
 }
 
 export function formatDate(value?: string | null, empty = "—") {
@@ -92,16 +93,16 @@ export function formatDate(value?: string | null, empty = "—") {
   return shortDateYear(value) || empty;
 }
 
-export function formatLastLogin(value?: string | null, empty = "не входил") {
+export function formatLastLogin(value?: string | null, empty = t("admin.never_signed")) {
   if (!value) return empty;
   const elapsed = Date.now() - new Date(value).getTime();
   if (elapsed < 0 || elapsed >= 7 * 24 * 60 * 60 * 1000) return formatDate(value, empty);
   const minutes = Math.floor(elapsed / 60_000);
-  if (minutes < 1) return "сейчас";
-  if (minutes < 60) return `${minutes} мин назад`;
+  if (minutes < 1) return t("common.just_now");
+  if (minutes < 60) return t("time.minutes_ago", { count: minutes });
   const hours = Math.floor(minutes / 60);
-  if (hours < 24) return `${hours} ч назад`;
-  return `${Math.floor(hours / 24)} дн. назад`;
+  if (hours < 24) return t("time.hours_ago", { count: hours });
+  return t("time.days_ago", { count: Math.floor(hours / 24) });
 }
 
 export function auditItem(event: EmployeeAuditEvent) {
diff --git a/apps/internal-ui/src/features/help-center/HelpArticle.tsx b/apps/internal-ui/src/features/help-center/HelpArticle.tsx
index 2f951b1..aa5dce1 100644
--- a/apps/internal-ui/src/features/help-center/HelpArticle.tsx
+++ b/apps/internal-ui/src/features/help-center/HelpArticle.tsx
@@ -6,6 +6,7 @@ import { HelpLayout } from "./HelpLayout";
 import { HelpAttachments } from "./HelpAttachments";
 import { MarkdownContent, parseMarkdown } from "./MarkdownContent";
 import type { HelpArticle as HelpArticleType, HelpManifest } from "./types";
+import { t } from "../../i18n";
 
 function formattedDate(value: string, locale: string): string {
   return new Intl.DateTimeFormat(locale, {
@@ -69,15 +70,15 @@ export function HelpArticle({
     >
       {failed ? (
         <section className="help-article-error">
-          <strong>Статья не найдена</strong>
-          <a href={homeHref}>Вернуться в базу знаний</a>
+          <strong>{t("portals.article_not_found")}</strong>
+          <a href={homeHref}>{t("portals.back_knowledge_base")}</a>
         </section>
       ) : !article ? (
         <section className="help-article-loading"><i /><i /><i /><i /></section>
       ) : (
         <div className="help-article-shell">
-          <nav className="help-breadcrumbs" aria-label="Навигация">
-            <a href={homeHref}>Все разделы</a>
+          <nav className="help-breadcrumbs" aria-label={t("portals.navigation")}>
+            <a href={homeHref}>{t("portals.all_sections")}</a>
             <HelpChevronIcon />
             <a href={`${homeHref}?category=${encodeURIComponent(article.category.slug)}`}>
               {article.category.name}
@@ -91,7 +92,7 @@ export function HelpArticle({
                 <h1>{article.revision.title}</h1>
                 {article.revision.summary && <p>{article.revision.summary}</p>}
                 <time dateTime={article.updatedAt}>
-                  Обновлено {formattedDate(article.updatedAt, article.locale)}
+                  {t("portals.updated_on", { date: formattedDate(article.updatedAt, article.locale) })}
                 </time>
               </header>
               <MarkdownContent content={article.revision.content ?? ""} />
@@ -99,16 +100,16 @@ export function HelpArticle({
               <section className="help-feedback">
                 {feedback === "sent" ? (
                   <div className="help-feedback-thanks">
-                    <strong>Спасибо за отзыв</strong>
-                    <span>Он поможет сделать базу знаний полезнее.</span>
+                    <strong>{t("portals.thank_feedback")}</strong>
+                    <span>{t("portals.helps_make_knowledge_base_more")}</span>
                   </div>
                 ) : (
                   <>
-                    <h2>Эта статья была полезна?</h2>
-                    {feedback === "error" && <p role="alert">Не удалось отправить отзыв. Попробуйте ещё раз.</p>}
+                    <h2>{t("portals.was_article_helpful")}</h2>
+                    {feedback === "error" && <p role="alert">{t("portals.could_not_send_feedback_try")}</p>}
                     <div>
                       <button
-                        aria-label="Да, статья полезна"
+                        aria-label={t("portals.yes_article_helped")}
                         disabled={feedback === "sending"}
                         type="button"
                         onClick={() => void vote(true)}
@@ -116,7 +117,7 @@ export function HelpArticle({
                         <HelpThumbIcon direction="up" />
                       </button>
                       <button
-                        aria-label="Нет, статья не помогла"
+                        aria-label={t("portals.no_article_did_not_help")}
                         disabled={feedback === "sending"}
                         type="button"
                         onClick={() => void vote(false)}
@@ -129,8 +130,8 @@ export function HelpArticle({
               </section>
             </article>
             {headings.length > 0 && (
-              <aside className="help-toc" aria-label="Содержание статьи">
-                <strong>В этой статье</strong>
+              <aside className="help-toc" aria-label={t("portals.article_contents")}>
+                <strong>{t("portals.article_2")}</strong>
                 <nav>
                   {headings.map((heading) => (
                     <a className={heading.level === 3 ? "is-nested" : ""} href={`#${heading.id}`} key={heading.id}>
diff --git a/apps/internal-ui/src/features/help-center/HelpAttachments.tsx b/apps/internal-ui/src/features/help-center/HelpAttachments.tsx
index a15e238..e5047cc 100644
--- a/apps/internal-ui/src/features/help-center/HelpAttachments.tsx
+++ b/apps/internal-ui/src/features/help-center/HelpAttachments.tsx
@@ -1,4 +1,6 @@
 import type { HelpAttachment } from "./types";
+import { t } from "../../i18n";
+import { readableSize } from "../../shared/utils";
 
 // Вложения статьи портала: картинки вставлены в текст самой статьёй, а
 // документы посетитель скачивает списком под ней — с иконкой формата и
@@ -36,19 +38,14 @@ function extensionOf(name: string): string {
 
 function formatLabel(name: string): string {
   const extension = extensionOf(name);
-  return EXTENSION_LABEL[extension] ?? (extension ? extension.toUpperCase().slice(0, 4) : "ФАЙЛ");
-}
-
-function readableSize(bytes: number): string {
-  if (bytes >= 1024 * 1024) return `${(bytes / 1024 / 1024).toFixed(1).replace(".", ",")} МБ`;
-  return `${Math.max(1, Math.round(bytes / 1024))} КБ`;
+  return EXTENSION_LABEL[extension] ?? (extension ? extension.toUpperCase().slice(0, 4) : t("portals.file"));
 }
 
 export function HelpAttachments({ attachments }: { attachments: HelpAttachment[] }) {
   if (attachments.length === 0) return null;
   return (
     <section className="help-attachments">
-      <h2>Файлы к статье</h2>
+      <h2>{t("portals.files_article_2")}</h2>
       <ul>
         {attachments.map((attachment) => (
           <li key={attachment.path}>
diff --git a/apps/internal-ui/src/features/help-center/HelpCenterApp.tsx b/apps/internal-ui/src/features/help-center/HelpCenterApp.tsx
index 253619d..be1dc76 100644
--- a/apps/internal-ui/src/features/help-center/HelpCenterApp.tsx
+++ b/apps/internal-ui/src/features/help-center/HelpCenterApp.tsx
@@ -11,6 +11,7 @@ import "./styles-layout.css";
 import "./styles-home.css";
 import "./styles-article.css";
 import "./styles-responsive.css";
+import { t } from "../../i18n";
 
 type HelpRoute = {
   articleSlug: string | null;
@@ -47,8 +48,8 @@ export function HelpCenterApp() {
   if (failed || !route) {
     return (
       <main className="help-fatal">
-        <strong>Портал поддержки не найден</strong>
-        <span>Проверьте адрес или обратитесь к администратору организации.</span>
+        <strong>{t("portals.support_portal_not_found")}</strong>
+        <span>{t("portals.check_address_or_ask_organization")}</span>
       </main>
     );
   }
diff --git a/apps/internal-ui/src/features/help-center/HelpHome.tsx b/apps/internal-ui/src/features/help-center/HelpHome.tsx
index b81a380..6d2d750 100644
--- a/apps/internal-ui/src/features/help-center/HelpHome.tsx
+++ b/apps/internal-ui/src/features/help-center/HelpHome.tsx
@@ -5,20 +5,12 @@ import { HelpArrowIcon, HelpFolderIcon } from "./HelpIcons";
 import { HelpLayout } from "./HelpLayout";
 import { HelpSearch } from "./HelpSearch";
 import type { HelpArticle, HelpManifest } from "./types";
+import { t, tn } from "../../i18n";
 
 function articleHref(articleSlug: string): string {
   return `/articles/${encodeURIComponent(articleSlug)}/`;
 }
 
-function articleCount(value: number): string {
-  const mod100 = value % 100;
-  const mod10 = value % 10;
-  const word = mod100 >= 11 && mod100 <= 14
-    ? "статей"
-    : mod10 === 1 ? "статья" : mod10 >= 2 && mod10 <= 4 ? "статьи" : "статей";
-  return `${value} ${word}`;
-}
-
 export function HelpHome({ manifest }: { manifest: HelpManifest }) {
   const params = useMemo(() => new URLSearchParams(window.location.search), []);
   const [search, setSearch] = useState(params.get("q") ?? "");
@@ -101,15 +93,13 @@ export function HelpHome({ manifest }: { manifest: HelpManifest }) {
           <div className="help-results">
             <div className="help-results-heading">
               <div>
-                <span>{selectedCategory ? selectedCategory.name : "Результаты поиска"}</span>
-                <h1>{search.trim() ? `Поиск: «${search.trim()}»` : selectedCategory?.name}</h1>
+                <span>{selectedCategory ? selectedCategory.name : t("portals.search_results")}</span>
+                <h1>{search.trim() ? t("portals.search_query", { query: search.trim() }) : selectedCategory?.name}</h1>
               </div>
-              <button type="button" onClick={() => { setSearch(""); chooseCategory(""); }}>
-                Все разделы
-              </button>
+              <button type="button" onClick={() => { setSearch(""); chooseCategory(""); }}>{t("portals.all_sections")}</button>
             </div>
             {failed ? (
-              <div className="help-empty"><strong>Не удалось загрузить статьи</strong><span>Попробуйте обновить страницу.</span></div>
+              <div className="help-empty"><strong>{t("portals.could_not_load_articles")}</strong><span>{t("portals.try_reloading_page")}</span></div>
             ) : articles === null ? (
               <div className="help-loading-lines"><i /><i /><i /></div>
             ) : articles.length ? (
@@ -122,10 +112,10 @@ export function HelpHome({ manifest }: { manifest: HelpManifest }) {
                     <HelpArrowIcon />
                   </a>
                 ))}
-                {hasMore && <button className="help-load-more" type="button" onClick={() => void loadMore()}>Показать ещё</button>}
+                {hasMore && <button className="help-load-more" type="button" onClick={() => void loadMore()}>{t("portals.show_more")}</button>}
               </div>
             ) : (
-              <div className="help-empty"><strong>Ничего не найдено</strong><span>Попробуйте изменить запрос или открыть другой раздел.</span></div>
+              <div className="help-empty"><strong>{t("common.nothing_found")}</strong><span>{t("portals.try_changing_query_or_opening")}</span></div>
             )}
           </div>
         ) : (
@@ -136,7 +126,7 @@ export function HelpHome({ manifest }: { manifest: HelpManifest }) {
                 <span className="help-category-copy">
                   <strong>{item.name}</strong>
                   {item.description && <p>{item.description}</p>}
-                  <small>{articleCount(item.articleCount)}</small>
+                  <small>{tn("plural.articles", item.articleCount)}</small>
                 </span>
               </button>
             ))}
diff --git a/apps/internal-ui/src/features/help-center/HelpLayout.tsx b/apps/internal-ui/src/features/help-center/HelpLayout.tsx
index 1c4a535..57532bb 100644
--- a/apps/internal-ui/src/features/help-center/HelpLayout.tsx
+++ b/apps/internal-ui/src/features/help-center/HelpLayout.tsx
@@ -4,6 +4,7 @@ import { LogoIcon } from "../../shared/icons";
 import { HelpSearch } from "./HelpSearch";
 import { PortalWebWidget } from "./PortalWebWidget";
 import type { HelpPortal } from "./types";
+import { t } from "../../i18n";
 
 export function HelpLayout({
   portal,
@@ -45,7 +46,7 @@ export function HelpLayout({
           <span className="help-brand-mark"><LogoIcon /></span>
           <span>{portal.name}</span>
         </a>
-        <span>База знаний и поддержка</span>
+        <span>{t("portals.knowledge_base_support")}</span>
       </footer>
       {portal.webWidgetKey && <PortalWebWidget widgetKey={portal.webWidgetKey} />}
     </div>
diff --git a/apps/internal-ui/src/features/help-center/HelpSearch.tsx b/apps/internal-ui/src/features/help-center/HelpSearch.tsx
index b26cee0..7d877ee 100644
--- a/apps/internal-ui/src/features/help-center/HelpSearch.tsx
+++ b/apps/internal-ui/src/features/help-center/HelpSearch.tsx
@@ -1,6 +1,7 @@
 import { type FormEvent, useState } from "react";
 
 import { HelpSearchIcon } from "./HelpIcons";
+import { t } from "../../i18n";
 
 export function HelpSearch({
   value,
@@ -28,8 +29,8 @@ export function HelpSearch({
     >
       <HelpSearchIcon />
       <input
-        aria-label="Поиск по базе знаний"
-        placeholder="Поиск по статьям..."
+        aria-label={t("portals.search_knowledge_base")}
+        placeholder={t("portals.search_articles_2")}
         type="search"
         value={value}
         onBlur={() => setFocused(false)}
diff --git a/apps/internal-ui/src/features/help-center/themes/classic/manifest.ts b/apps/internal-ui/src/features/help-center/themes/classic/manifest.ts
index e068fcf..b0a0b52 100644
--- a/apps/internal-ui/src/features/help-center/themes/classic/manifest.ts
+++ b/apps/internal-ui/src/features/help-center/themes/classic/manifest.ts
@@ -1,9 +1,10 @@
 import type { PortalThemeManifest } from "../types";
+import { t } from "../../../../i18n";
 
 export const manifest: PortalThemeManifest = {
   id: "classic",
-  name: "Классическая",
-  description: "Базовое оформление Help Center: светлая подложка, чернильный акцент.",
+  name: t("portals.classic"),
+  description: t("portals.base_help_center_look_light"),
   schemes: ["light", "dark"],
   preview: { bg: "#ffffff", ink: "#1f1f1f", accent: "#1f1f1f", radius: "5px" },
 };
diff --git a/apps/internal-ui/src/features/help-center/themes/ocean/manifest.ts b/apps/internal-ui/src/features/help-center/themes/ocean/manifest.ts
index 6614230..2c126d1 100644
--- a/apps/internal-ui/src/features/help-center/themes/ocean/manifest.ts
+++ b/apps/internal-ui/src/features/help-center/themes/ocean/manifest.ts
@@ -1,9 +1,10 @@
 import type { PortalThemeManifest } from "../types";
+import { t } from "../../../../i18n";
 
 export const manifest: PortalThemeManifest = {
   id: "ocean",
   name: "Ocean",
-  description: "Мягкое океаническое оформление: синий акцент, крупные скругления.",
+  description: t("portals.soft_oceanic_look_blue_accent"),
   schemes: ["light", "dark"],
   preview: { bg: "#ffffff", ink: "#10283d", accent: "#1b5e8f", radius: "9px" },
 };
diff --git a/apps/internal-ui/src/features/help-center/themes/registry.ts b/apps/internal-ui/src/features/help-center/themes/registry.ts
index d14937a..a1e6a58 100644
--- a/apps/internal-ui/src/features/help-center/themes/registry.ts
+++ b/apps/internal-ui/src/features/help-center/themes/registry.ts
@@ -9,6 +9,7 @@ import type {
   PortalThemeScheme,
   PortalThemeSchemeSetting,
 } from "./types";
+import { t } from "../../../i18n";
 
 export const DEFAULT_PORTAL_THEME_ID = "classic";
 
@@ -53,7 +54,7 @@ export function resolvePortalTheme(id: string): PortalThemeManifest {
   // Каталог тем пуст только в тесте, который сам себе его подменил.
   return {
     id: DEFAULT_PORTAL_THEME_ID,
-    name: "Классическая",
+    name: t("portals.classic"),
     description: "",
     schemes: ["light"],
     preview: { bg: "#ffffff", ink: "#1f1f1f", accent: "#1f1f1f" },
@@ -80,12 +81,12 @@ export function schemeOptions(
   theme: PortalThemeManifest,
 ): Array<[PortalThemeSchemeSetting, string]> {
   const options: Array<[PortalThemeSchemeSetting, string]> = [];
-  if (theme.schemes.includes("light")) options.push(["LIGHT", "Светлая"]);
-  if (theme.schemes.includes("dark")) options.push(["DARK", "Тёмная"]);
+  if (theme.schemes.includes("light")) options.push(["LIGHT", t("profile.light")]);
+  if (theme.schemes.includes("dark")) options.push(["DARK", t("profile.dark")]);
   if (theme.schemes.includes("light") && theme.schemes.includes("dark")) {
-    options.push(["SYSTEM", "Как в системе"]);
+    options.push(["SYSTEM", t("profile.match_system")]);
   }
-  return options.length ? options : [["LIGHT", "Светлая"]];
+  return options.length ? options : [["LIGHT", t("profile.light")]];
 }
 
 export async function loadPortalThemeStyles(id: string): Promise<void> {
diff --git a/apps/internal-ui/src/features/integrations/ConnectionsTable.tsx b/apps/internal-ui/src/features/integrations/ConnectionsTable.tsx
index acfa72f..3c35627 100644
--- a/apps/internal-ui/src/features/integrations/ConnectionsTable.tsx
+++ b/apps/internal-ui/src/features/integrations/ConnectionsTable.tsx
@@ -2,13 +2,14 @@ import { agentColorOf } from "../conversations/model";
 import { Icon } from "../../shared/icons";
 import { PROVIDERS, type Integration } from "./model";
 import { ConnectionIcon, RowActions, StatusCell } from "./rows";
+import { t } from "../../i18n";
 
 // Подстрока подключения (SPEC-CHATBALLS-0025 §2.4): провайдер + идентификатор.
 function subtitle(integration: Integration): string {
   const label = PROVIDERS[integration.provider].label;
   const { config } = integration;
   if (integration.provider === "EMAIL") return config.email ? `${label} · ${config.email}` : label;
-  if (config.purpose === "notifications") return `${label} · сервисный бот уведомлений`;
+  if (config.purpose === "notifications") return t("settings.service_notification_bot_named", { name: label });
   if (config.botUsername) return `${label} · @${config.botUsername}`;
   if (config.botName) return `${label} · ${config.botName}`;
   return label;
@@ -29,9 +30,9 @@ export function ConnectionsTable({ items, testingId, onTest, onEdit, onToggleAct
       <table className="baseline-table">
         <thead>
           <tr>
-            <th>НАЗВАНИЕ</th>
-            <th>АГЕНТ</th>
-            <th>СТАТУС</th>
+            <th>{t("settings.title")}</th>
+            <th>{t("ai.agent")}</th>
+            <th>{t("common.status_2")}</th>
             <th />
           </tr>
         </thead>
diff --git a/apps/internal-ui/src/features/integrations/EmailFields.tsx b/apps/internal-ui/src/features/integrations/EmailFields.tsx
index b501a2f..f37e2d5 100644
--- a/apps/internal-ui/src/features/integrations/EmailFields.tsx
+++ b/apps/internal-ui/src/features/integrations/EmailFields.tsx
@@ -1,5 +1,6 @@
 import { FormField } from "../../shared/form-controls";
 import type { Integration } from "./model";
+import { t } from "../../i18n";
 
 // Поля Email-подключения (SPEC-CHATBALLS-0025 §3.2): адрес + секции IMAP и SMTP.
 // Порты — строками в состоянии формы; в конфиг уходят числами.
@@ -62,8 +63,8 @@ function MailboxSection({ title, host, port, ssl, hostPlaceholder, portPlacehold
     <div className="integration-email-section">
       <h3>{title}</h3>
       <div className="integration-email-grid">
-        <FormField label="Хост" mono value={host} onChange={(value) => onChange({ host: value })} placeholder={hostPlaceholder} />
-        <FormField label="Порт" mono value={port} onChange={(value) => onChange({ port: value })} placeholder={portPlaceholder} />
+        <FormField label={t("settings.host")} mono value={host} onChange={(value) => onChange({ host: value })} placeholder={hostPlaceholder} />
+        <FormField label={t("settings.port")} mono value={port} onChange={(value) => onChange({ port: value })} placeholder={portPlaceholder} />
       </div>
       <label className="integration-ssl-toggle">
         <input type="checkbox" checked={ssl} onChange={(event) => onChange({ ssl: event.target.checked })} />
@@ -77,9 +78,9 @@ export function EmailFields({ value, onChange }: { value: EmailConfigState; onCh
   const set = (patch: Partial<EmailConfigState>) => onChange({ ...value, ...patch });
   return (
     <>
-      <FormField label="Email-адрес" mono value={value.email} onChange={(email) => set({ email })} placeholder="support@company.ru" />
+      <FormField label={t("settings.email_address")} mono value={value.email} onChange={(email) => set({ email })} placeholder="support@company.ru" />
       <MailboxSection
-        title="Входящая почта · IMAP"
+        title={t("settings.incoming_mail_imap")}
         host={value.imapHost}
         port={value.imapPort}
         ssl={value.imapSsl}
@@ -88,7 +89,7 @@ export function EmailFields({ value, onChange }: { value: EmailConfigState; onCh
         onChange={({ host, port, ssl }) => set({ ...(host !== undefined && { imapHost: host }), ...(port !== undefined && { imapPort: port }), ...(ssl !== undefined && { imapSsl: ssl }) })}
       />
       <MailboxSection
-        title="Исходящая почта · SMTP"
+        title={t("settings.outgoing_mail_smtp")}
         host={value.smtpHost}
         port={value.smtpPort}
         ssl={value.smtpSsl}
diff --git a/apps/internal-ui/src/features/integrations/IntegrationForm.tsx b/apps/internal-ui/src/features/integrations/IntegrationForm.tsx
index f1cb72d..435da3f 100644
--- a/apps/internal-ui/src/features/integrations/IntegrationForm.tsx
+++ b/apps/internal-ui/src/features/integrations/IntegrationForm.tsx
@@ -18,6 +18,7 @@ import {
   type IntegrationKind,
   type IntegrationProvider,
 } from "./model";
+import { t } from "../../i18n";
 
 // Селектор «Тип» показывает только провайдеров рода активного таба (SPEC-CHATBALLS-0025 §2.2).
 function providerOptions(kind: IntegrationKind): Array<[string, string]> {
@@ -109,21 +110,21 @@ export function IntegrationForm({ initial, kind, onClose, onSaved }: { initial:
       }
       onSaved();
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось сохранить");
+      setError(caught instanceof Error ? caught.message : t("common.could_not_save"));
     } finally {
       setSubmitting(false);
     }
   }
 
   return (
-    <Modal open title={isEdit ? "Изменить интеграцию" : "Новая интеграция"} onCancel={onClose} footer={null} destroyOnClose>
+    <Modal open title={isEdit ? t("settings.edit_integration") : t("settings.new_integration")} onCancel={onClose} footer={null} destroyOnClose>
       <div className="integration-form">
         {isEdit ? (
-          <FormField label="Тип" value={meta.label} />
+          <FormField label={t("settings.type")} value={meta.label} />
         ) : (
-          <SelectField label="Тип" value={provider} onChange={(value) => setProvider(value as IntegrationProvider)} options={options} />
+          <SelectField label={t("settings.type")} value={provider} onChange={(value) => setProvider(value as IntegrationProvider)} options={options} />
         )}
-        <FormField label="Название" value={name} onChange={setName} placeholder={isEmail ? "например, Почта поддержки" : "например, OpenRouter · основной"} />
+        <FormField label={t("common.title")} value={name} onChange={setName} placeholder={isEmail ? t("settings.e_g_support_mailbox") : t("settings.e_g_openrouter_primary")} />
         {isEmail && <EmailFields value={emailConfig} onChange={setEmailConfig} />}
         {meta.testable && (
           <FormField
@@ -131,67 +132,65 @@ export function IntegrationForm({ initial, kind, onClose, onSaved }: { initial:
             value={secret}
             onChange={setSecret}
             type="password"
-            placeholder={isEdit ? "оставьте пустым, чтобы не менять" : ""}
+            placeholder={isEdit ? t("settings.leave_empty_keep_unchanged") : ""}
           />
         )}
         {isEmail && !isEdit && (
-          <div className="integration-form-hint">Для Gmail и Яндекс используйте пароль приложения, не основной пароль аккаунта</div>
+          <div className="integration-form-hint">{t("settings.gmail_yandex_use_app_password")}</div>
         )}
-        {isDemo && <div className="integration-form-hint">Отвечает по знаниям агента без внешних запросов и ключей. Качество ответов ограничено — для реальной работы подключите OpenRouter или совместимый провайдер.</div>}
+        {isDemo && <div className="integration-form-hint">{t("settings.answers_from_agent_s_knowledge")}</div>}
         {!isEmail && !isWeb && !isDemo && <FormField label="Base URL" value={baseUrl} onChange={setBaseUrl} placeholder={meta.defaultBaseUrl || "—"} />}
         {isWeb && (
           <>
             <FormField
-              label="Разрешённые домены"
+              label={t("settings.allowed_domains")}
               value={allowedOrigins}
               onChange={setAllowedOrigins}
-              error={badOrigin && `Непонятный домен: ${badOrigin}`}
-              placeholder="example.com, *.example.com — через запятую"
+              error={badOrigin && t("settings.unclear_domain", { domain: badOrigin })}
+              placeholder={t("settings.example_com_example_com_comma")}
             />
-            <div className="integration-form-hint">Сайты, на которых виджету разрешено открываться: домен, поддомены через «*.» или полный origin с портом. На остальных чат ответит «Чат временно недоступен»</div>
+            <div className="integration-form-hint">{t("settings.sites_where_widget_may_open")}</div>
           </>
         )}
         {!isWeb && !isEmail && !isDemo && (
           <>
-            <FormField label="Прокси" value={proxyUrl} onChange={setProxyUrl} placeholder="http://host:port или socks5://user:pass@host:port — пусто, если без прокси" />
-            <div className="integration-form-hint">Пароль прокси наружу не отдаётся: вместо него точки. Оставьте их как есть — прежний пароль сохранится; чтобы сменить, впишите новый целиком</div>
+            <FormField label={t("settings.proxy")} value={proxyUrl} onChange={setProxyUrl} placeholder={t("settings.http_host_port_or_socks5")} />
+            <div className="integration-form-hint">{t("settings.proxy_password_never_returned_dots")}</div>
           </>
         )}
         {meta.hasModel && (
-          <FormField label="Модель по умолчанию" value={defaultModel} onChange={setDefaultModel} placeholder={provider === "OPENROUTER" ? "anthropic/claude-sonnet-4.6" : ""} />
+          <FormField label={t("settings.default_model")} value={defaultModel} onChange={setDefaultModel} placeholder={provider === "OPENROUTER" ? "anthropic/claude-sonnet-4.6" : ""} />
         )}
         {meta.hasModel && !isDemo && (
-          <FormField label="Модель расшифровки голосовых" value={transcriptionModel} onChange={setTranscriptionModel} placeholder="whisper-1" />
+          <FormField label={t("settings.voice_transcription_model")} value={transcriptionModel} onChange={setTranscriptionModel} placeholder="whisper-1" />
         )}
         {isEdit && initial.config.botUsername && (
-          <FormField label="Бот" value={`${initial.config.botName || initial.config.botUsername}${initial.config.botUsername ? ` · @${initial.config.botUsername}` : ""}${initial.config.botId ? ` · id ${initial.config.botId}` : ""}`} />
+          <FormField label={t("settings.bot")} value={`${initial.config.botName || initial.config.botUsername}${initial.config.botUsername ? ` · @${initial.config.botUsername}` : ""}${initial.config.botId ? ` · id ${initial.config.botId}` : ""}`} />
         )}
         {isMessenger && !isWeb && !isEmail && (
           <label className="integration-notifier-toggle">
-            <input type="checkbox" checked={isNotifier} onChange={(event) => setIsNotifier(event.target.checked)} />
-            Бот уведомлений для сотрудников (сервисный, клиентам не отвечает; привязка в профиле)
-          </label>
+            <input type="checkbox" checked={isNotifier} onChange={(event) => setIsNotifier(event.target.checked)} />{t("settings.notification_bot_operators_service_bot")}</label>
         )}
         {isMessenger && !isNotifier && (
           <SelectField
-            label="Агент"
+            label={t("common.agent")}
             value={channelId}
             onChange={setChannelId}
-            options={[["", "— не привязан —"], ...channels.map((c) => [String(c.id), c.name] as [string, string])]}
+            options={[["", t("settings.not_linked")], ...channels.map((c) => [String(c.id), c.name] as [string, string])]}
           />
         )}
         {widgetSnippet && (
           <div className="integration-snippet">
-            <FormField label="Код вставки на сайт" mono value={widgetSnippet} />
+            <FormField label={t("settings.embed_snippet_site")} mono value={widgetSnippet} />
             <Button variant="secondary" icon={copied ? "check" : "copy"} iconSize={15} onClick={() => void copySnippet()}>
-              {copied ? "Скопировано" : "Копировать"}
+              {copied ? t("common.copied") : t("common.copy")}
             </Button>
           </div>
         )}
         {error && <div className="integration-form-error">{error}</div>}
         <div className="integration-form-actions">
-          <Button variant="secondary" onClick={onClose}>Отмена</Button>
-          <Button variant="primary" disabled={!ready || submitting} onClick={submit}>{submitting ? "Сохранение…" : "Сохранить"}</Button>
+          <Button variant="secondary" onClick={onClose}>{t("common.cancel")}</Button>
+          <Button variant="primary" disabled={!ready || submitting} onClick={submit}>{submitting ? t("ai.saving") : t("common.save")}</Button>
         </div>
       </div>
     </Modal>
diff --git a/apps/internal-ui/src/features/integrations/IntegrationsSection.tsx b/apps/internal-ui/src/features/integrations/IntegrationsSection.tsx
index 66b6653..a9dafa0 100644
--- a/apps/internal-ui/src/features/integrations/IntegrationsSection.tsx
+++ b/apps/internal-ui/src/features/integrations/IntegrationsSection.tsx
@@ -7,6 +7,7 @@ import { Button } from "../../shared/ui-controls";
 import { ConnectionsTable } from "./ConnectionsTable";
 import type { Integration, IntegrationKind } from "./model";
 import { ProvidersTable } from "./ProvidersTable";
+import { t } from "../../i18n";
 
 // Таблица интеграций одного рода — раздел экрана «Настройки» (дизайн-базлайн v2,
 // кадры N3/N4): подключения (MESSENGER) и AI-провайдеры (LLM_PROVIDER) — два
@@ -53,7 +54,7 @@ export function IntegrationsSection({ kind, items, reload, onEdit }: {
       setDeleting(null);
       reload();
     } catch (caught) {
-      setDeletingError(caught instanceof Error ? caught.message : "Не удалось удалить");
+      setDeletingError(caught instanceof Error ? caught.message : t("settings.could_not_delete"));
     }
   }
 
@@ -69,23 +70,23 @@ export function IntegrationsSection({ kind, items, reload, onEdit }: {
   return (
     <div className="integrations-section">
       {items.length === 0 ? (
-        <EmptyState title={isConnections ? "Подключений пока нет. Добавьте бота, почту или Web-виджет." : "Провайдеров пока нет. Добавьте OpenRouter или Custom endpoint."} />
+        <EmptyState title={isConnections ? t("settings.no_connections_yet_add_bot") : t("settings.no_providers_yet_add_openrouter")} />
       ) : isConnections ? (
         <ConnectionsTable items={items} {...rowHandlers} />
       ) : (
         <ProvidersTable items={items} {...rowHandlers} />
       )}
       {isConnections && items.length > 0 && (
-        <p className="settings-section-note">Код вставки Web-виджета копируется на карточке его агента.</p>
+        <p className="settings-section-note">{t("settings.web_widget_embed_snippet_copied")}</p>
       )}
       {deleting && (
-        <Modal open title="Удалить интеграцию?" onCancel={() => setDeleting(null)} footer={null} destroyOnClose>
+        <Modal open title={t("settings.delete_integration")} onCancel={() => setDeleting(null)} footer={null} destroyOnClose>
           <div className="integration-form">
-            <p>{`«${deleting.name}» будет удалена. Действие необратимо.`}</p>
+            <p>{t("settings.will_be_deleted_irreversible", { name: deleting.name })}</p>
             {deletingError && <div className="integration-form-error">{deletingError}</div>}
             <div className="integration-form-actions">
-              <Button variant="secondary" onClick={() => setDeleting(null)}>Отмена</Button>
-              <Button variant="danger-outline" onClick={() => void confirmDelete()}>Удалить</Button>
+              <Button variant="secondary" onClick={() => setDeleting(null)}>{t("common.cancel")}</Button>
+              <Button variant="danger-outline" onClick={() => void confirmDelete()}>{t("common.delete")}</Button>
             </div>
           </div>
         </Modal>
diff --git a/apps/internal-ui/src/features/integrations/ProvidersTable.tsx b/apps/internal-ui/src/features/integrations/ProvidersTable.tsx
index 47c67e4..bc72091 100644
--- a/apps/internal-ui/src/features/integrations/ProvidersTable.tsx
+++ b/apps/internal-ui/src/features/integrations/ProvidersTable.tsx
@@ -1,5 +1,6 @@
 import { PROVIDERS, type Integration } from "./model";
 import { ConnectionIcon, RowActions, StatusCell } from "./rows";
+import { t } from "../../i18n";
 
 type ProvidersTableProps = {
   items: Integration[];
@@ -16,10 +17,10 @@ export function ProvidersTable({ items, testingId, onTest, onEdit, onToggleActiv
       <table className="baseline-table">
         <thead>
           <tr>
-            <th>НАЗВАНИЕ</th>
-            <th>СЕКРЕТ</th>
-            <th>КОНФИГ</th>
-            <th>СТАТУС</th>
+            <th>{t("settings.title")}</th>
+            <th>{t("settings.secret")}</th>
+            <th>{t("settings.config")}</th>
+            <th>{t("common.status_2")}</th>
             <th />
           </tr>
         </thead>
diff --git a/apps/internal-ui/src/features/integrations/model.ts b/apps/internal-ui/src/features/integrations/model.ts
index fc5c539..a5b0ac0 100644
--- a/apps/internal-ui/src/features/integrations/model.ts
+++ b/apps/internal-ui/src/features/integrations/model.ts
@@ -1,4 +1,5 @@
 import { api } from "../../api/client";
+import { t } from "../../i18n";
 
 export type IntegrationProvider = "OPENROUTER" | "CUSTOM" | "DEMO" | "MAX" | "TELEGRAM" | "WEB" | "EMAIL";
 export type IntegrationKind = "LLM_PROVIDER" | "MESSENGER";
@@ -69,28 +70,28 @@ type ProviderMeta = {
 };
 
 export const PROVIDERS: Record<IntegrationProvider, ProviderMeta> = {
-  OPENROUTER: { label: "OpenRouter", kind: "LLM_PROVIDER", secretLabel: "API-ключ", defaultBaseUrl: "https://openrouter.ai/api/v1", hasModel: true, testable: true, checkable: true },
+  OPENROUTER: { label: "OpenRouter", kind: "LLM_PROVIDER", secretLabel: t("settings.api_key"), defaultBaseUrl: "https://openrouter.ai/api/v1", hasModel: true, testable: true, checkable: true },
   // Custom — generic BYOK для любого OpenAI-compatible endpoint (ADR-CHATBALLS-0034).
   // Каталога нет: модель вводится свободным текстом и читается в рантайме.
-  CUSTOM: { label: "Custom (OpenAI-compatible)", kind: "LLM_PROVIDER", secretLabel: "API-ключ", defaultBaseUrl: "", hasModel: true, testable: true, checkable: true },
+  CUSTOM: { label: "Custom (OpenAI-compatible)", kind: "LLM_PROVIDER", secretLabel: t("settings.api_key"), defaultBaseUrl: "", hasModel: true, testable: true, checkable: true },
   // Демо-провайдер — живой AI без ключей и сети для знакомства с системой: отвечает по знаниям агента.
-  DEMO: { label: "Демо-провайдер (без ключа)", kind: "LLM_PROVIDER", secretLabel: "", defaultBaseUrl: "", hasModel: false, testable: false, checkable: true },
-  MAX: { label: "MAX", kind: "MESSENGER", secretLabel: "Токен бота", defaultBaseUrl: "https://platform-api.max.ru", hasModel: false, testable: true, checkable: true },
-  TELEGRAM: { label: "Telegram", kind: "MESSENGER", secretLabel: "Токен бота", defaultBaseUrl: "https://api.telegram.org", hasModel: false, testable: true, checkable: true },
-  WEB: { label: "Web-виджет", kind: "MESSENGER", secretLabel: "", defaultBaseUrl: "", hasModel: false, testable: false, checkable: true },
+  DEMO: { label: t("settings.demo_provider_no_key"), kind: "LLM_PROVIDER", secretLabel: "", defaultBaseUrl: "", hasModel: false, testable: false, checkable: true },
+  MAX: { label: "MAX", kind: "MESSENGER", secretLabel: t("settings.bot_token"), defaultBaseUrl: "https://platform-api.max.ru", hasModel: false, testable: true, checkable: true },
+  TELEGRAM: { label: "Telegram", kind: "MESSENGER", secretLabel: t("settings.bot_token"), defaultBaseUrl: "https://api.telegram.org", hasModel: false, testable: true, checkable: true },
+  WEB: { label: t("common.web_widget"), kind: "MESSENGER", secretLabel: "", defaultBaseUrl: "", hasModel: false, testable: false, checkable: true },
   // Email — подключение-ящик IMAP/SMTP (ADR-CHATBALLS-0035); секрет — пароль приложения.
-  EMAIL: { label: "Email (IMAP/SMTP)", kind: "MESSENGER", secretLabel: "Пароль", defaultBaseUrl: "", hasModel: false, testable: true, checkable: true },
+  EMAIL: { label: "Email (IMAP/SMTP)", kind: "MESSENGER", secretLabel: t("common.password"), defaultBaseUrl: "", hasModel: false, testable: true, checkable: true },
 };
 
 export const STATUS_META: Record<IntegrationStatus, { label: string; bg: string; color: string }> = {
-  OK: { label: "Подключено", bg: "var(--success-bg)", color: "var(--success-text)" },
-  ERROR: { label: "Ошибка", bg: "var(--error-bg)", color: "var(--error-text)" },
-  UNCHECKED: { label: "Не проверено", bg: "var(--n-9)", color: "var(--n-4)" },
+  OK: { label: t("common.connected"), bg: "var(--success-bg)", color: "var(--success-text)" },
+  ERROR: { label: t("common.error"), bg: "var(--error-bg)", color: "var(--error-text)" },
+  UNCHECKED: { label: t("ai.not_checked"), bg: "var(--n-9)", color: "var(--n-4)" },
 };
 
 export const KIND_LABEL: Record<IntegrationKind, string> = {
-  LLM_PROVIDER: "Провайдеры",
-  MESSENGER: "Подключения",
+  LLM_PROVIDER: t("settings.providers"),
+  MESSENGER: t("common.connections"),
 };
 
 export type ChannelOption = { id: number; code: string; name: string };
diff --git a/apps/internal-ui/src/features/integrations/rows.tsx b/apps/internal-ui/src/features/integrations/rows.tsx
index a12fb0a..23fddaf 100644
--- a/apps/internal-ui/src/features/integrations/rows.tsx
+++ b/apps/internal-ui/src/features/integrations/rows.tsx
@@ -5,6 +5,7 @@ import { Icon, MaxLogo, TelegramLogo } from "../../shared/icons";
 import { Button, ToneBadge } from "../../shared/ui-controls";
 import { shortDateTime } from "../../shared/utils";
 import { PROVIDERS, STATUS_META, type Integration, type IntegrationProvider } from "./model";
+import { t } from "../../i18n";
 
 // Плитка подключения: фирменная марка на фирменном фоне (SPEC-CHATBALLS-0025 §2.3).
 // Web использует глиф и цвет кнопки-лончера виджета (webchat/loader.py).
@@ -37,7 +38,7 @@ export function ConnectionIcon({ provider }: { provider: IntegrationProvider })
 }
 
 export function formatChecked(value: string | null): string {
-  if (!value) return "ещё не проверялось";
+  if (!value) return t("settings.not_checked_yet");
   return shortDateTime(value);
 }
 
@@ -45,8 +46,8 @@ export function StatusCell({ integration }: { integration: Integration }) {
   if (!integration.isActive) {
     return (
       <div className="integration-status">
-        <ToneBadge bg="#f5f5f5" color="#8c8c8c">Отключено</ToneBadge>
-        <small>Приём и отправка сообщений остановлены</small>
+        <ToneBadge bg="#f5f5f5" color="#8c8c8c">{t("settings.disabled")}</ToneBadge>
+        <small>{t("settings.receiving_sending_messages_stopped")}</small>
       </div>
     );
   }
@@ -72,26 +73,26 @@ export function RowActions({ integration, testing, onTest, onEdit, onToggleActiv
   const [open, setOpen] = useState(false);
   const meta = PROVIDERS[integration.provider];
   const menuItems = [
-    { key: "edit", label: <button type="button" onClick={() => { setOpen(false); onEdit(integration); }}><Icon name="edit" size={15} />Изменить</button> },
+    { key: "edit", label: <button type="button" onClick={() => { setOpen(false); onEdit(integration); }}><Icon name="edit" size={15} />{t("common.edit")}</button> },
     ...(integration.kind === "MESSENGER" ? [{
       key: "active",
       label: (
         <button type="button" onClick={() => { setOpen(false); onToggleActive(integration); }}>
           <Icon name={integration.isActive ? "pause" : "plug"} size={15} />
-          {integration.isActive ? "Отключить" : "Включить"}
+          {integration.isActive ? t("profile.disconnect") : t("ai.turn")}
         </button>
       ),
     }] : []),
     { type: "divider" as const },
-    { key: "delete", label: <button type="button" className="warning" onClick={() => { setOpen(false); onDelete(integration); }}><Icon name="trash" size={15} />Удалить</button> },
+    { key: "delete", label: <button type="button" className="warning" onClick={() => { setOpen(false); onDelete(integration); }}><Icon name="trash" size={15} />{t("common.delete")}</button> },
   ];
   return (
     <div className="ai-row-actions">
       <Button variant="secondary" icon="refresh" iconSize={13} disabled={!meta.checkable || testing} onClick={() => onTest(integration)}>
-        {testing ? "Проверка…" : "Проверить"}
+        {testing ? t("settings.checking_2") : t("settings.check")}
       </Button>
       <Dropdown menu={{ items: menuItems }} open={open} onOpenChange={setOpen} trigger={["click"]} overlayClassName="app-dropdown">
-        <button className="row-menu-button" type="button" aria-label="Действия интеграции"><Icon name="more" /></button>
+        <button className="row-menu-button" type="button" aria-label={t("settings.integration_actions")}><Icon name="more" /></button>
       </Dropdown>
     </div>
   );
diff --git a/apps/internal-ui/src/features/notifications/NotificationDrawer.tsx b/apps/internal-ui/src/features/notifications/NotificationDrawer.tsx
index e3ba700..22e8105 100644
--- a/apps/internal-ui/src/features/notifications/NotificationDrawer.tsx
+++ b/apps/internal-ui/src/features/notifications/NotificationDrawer.tsx
@@ -2,6 +2,7 @@ import { Drawer } from "antd";
 
 import { Icon } from "../../shared/icons";
 import { LEVEL_META, type AppNotification } from "./model";
+import { t } from "../../i18n";
 
 function group(items: AppNotification[]): { today: AppNotification[]; earlier: AppNotification[] } {
   const now = new Date();
@@ -37,13 +38,13 @@ export function NotificationDrawer({ open, items, unreadCount, onClose, onItemCl
     <Drawer
       open={open}
       onClose={onClose}
-      title="Уведомления"
+      title={t("admin.notifications")}
       width={400}
-      extra={unreadCount > 0 ? <button className="notif-mark-all" type="button" onClick={onMarkAll}>Прочитать всё</button> : null}
+      extra={unreadCount > 0 ? <button className="notif-mark-all" type="button" onClick={onMarkAll}>{t("admin.mark_all_as_read")}</button> : null}
     >
-      {items.length === 0 && <div className="notif-empty">Уведомлений нет</div>}
-      {today.length > 0 && <Section title="Сегодня" items={today} onItemClick={onItemClick} />}
-      {earlier.length > 0 && <Section title="Ранее" items={earlier} onItemClick={onItemClick} />}
+      {items.length === 0 && <div className="notif-empty">{t("admin.no_notifications")}</div>}
+      {today.length > 0 && <Section title={t("common.today")} items={today} onItemClick={onItemClick} />}
+      {earlier.length > 0 && <Section title={t("admin.earlier")} items={earlier} onItemClick={onItemClick} />}
     </Drawer>
   );
 }
diff --git a/apps/internal-ui/src/features/profile/ProfileAppearanceCard.tsx b/apps/internal-ui/src/features/profile/ProfileAppearanceCard.tsx
index 995cd7d..5c6a312 100644
--- a/apps/internal-ui/src/features/profile/ProfileAppearanceCard.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileAppearanceCard.tsx
@@ -4,15 +4,16 @@ import { api } from "../../api/client";
 import { ACCENT_PRESETS, DEFAULT_ACCENT, type UiTheme } from "../../shared/appearance";
 import { Icon } from "../../shared/icons";
 import type { AuthenticatedUser, SessionUser } from "../../types";
+import { t } from "../../i18n";
 
 // «Внешний вид» (дизайн-базлайн v2, кадр P1; SPEC-CHATBALLS-0031 §7): тема сегментом
 // со значками, акцент — четыре пресета и произвольный HEX. Настройка личная и
 // хранится в учётной записи (ADR-0029).
 
 const THEME_OPTIONS: Array<[UiTheme, string, Parameters<typeof Icon>[0]["name"]]> = [
-  ["LIGHT", "Светлая", "sunny"],
-  ["DARK", "Тёмная", "moon"],
-  ["SYSTEM", "Как в системе", "monitor"],
+  ["LIGHT", t("profile.light"), "sunny"],
+  ["DARK", t("profile.dark"), "moon"],
+  ["SYSTEM", t("profile.match_system"), "monitor"],
 ];
 
 export function ProfileAppearanceCard({ user, onUserUpdated }: { user: SessionUser; onUserUpdated: (user: SessionUser) => void }) {
@@ -33,7 +34,7 @@ export function ProfileAppearanceCard({ user, onUserUpdated }: { user: SessionUs
       });
       onUserUpdated({ ...user, ...payload.user });
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось сохранить");
+      setErrorText(error instanceof Error ? error.message : t("common.could_not_save"));
     } finally {
       setSaving(false);
     }
@@ -42,7 +43,7 @@ export function ProfileAppearanceCard({ user, onUserUpdated }: { user: SessionUs
   function submitCustomAccent() {
     const value = customAccent.trim().toLowerCase();
     if (!/^#[0-9a-f]{6}$/.test(value)) {
-      setErrorText("Свой цвет — HEX вида #1677ff");
+      setErrorText(t("profile.custom_colour_hex_value_like"));
       return;
     }
     void save(user.uiTheme, value);
@@ -50,11 +51,11 @@ export function ProfileAppearanceCard({ user, onUserUpdated }: { user: SessionUs
 
   return (
     <section className="profile-card appearance-card">
-      <h3>Внешний вид</h3>
-      <p className="profile-card-lead">Настройка личная и хранится в учётной записи: применяется на всех ваших устройствах, без перезагрузки.</p>
+      <h3>{t("profile.appearance")}</h3>
+      <p className="profile-card-lead">{t("profile.personal_setting_stored_account_applies")}</p>
       {errorText && <div className="profile-message error">{errorText}</div>}
       <div className="appearance-row">
-        <span>Тема</span>
+        <span>{t("profile.theme")}</span>
         <div className="appearance-theme-options">
           {THEME_OPTIONS.map(([value, label, icon]) => (
             <button
@@ -71,7 +72,7 @@ export function ProfileAppearanceCard({ user, onUserUpdated }: { user: SessionUs
         </div>
       </div>
       <div className="appearance-row">
-        <span>Акцентный цвет</span>
+        <span>{t("profile.accent_colour")}</span>
         <div className="appearance-accents">
           {ACCENT_PRESETS.map(([value, label]) => (
             <button
@@ -100,7 +101,7 @@ export function ProfileAppearanceCard({ user, onUserUpdated }: { user: SessionUs
                 if (event.key === "Enter") submitCustomAccent();
               }}
             />
-            <button disabled={saving || !customAccent.trim()} type="button" onClick={submitCustomAccent}>Применить</button>
+            <button disabled={saving || !customAccent.trim()} type="button" onClick={submitCustomAccent}>{t("profile.apply")}</button>
           </div>
         </div>
       </div>
diff --git a/apps/internal-ui/src/features/profile/ProfileAvatarCard.tsx b/apps/internal-ui/src/features/profile/ProfileAvatarCard.tsx
index db4a9d1..3ec4a67 100644
--- a/apps/internal-ui/src/features/profile/ProfileAvatarCard.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileAvatarCard.tsx
@@ -5,6 +5,7 @@ import { DecisionDialog } from "../../shared/DecisionDialog";
 import { Avatar } from "../../shared/ui";
 import { Button } from "../../shared/ui-controls";
 import type { AuthenticatedUser, SessionUser } from "../../types";
+import { t } from "../../i18n";
 
 // Фото профиля (дизайн-базлайн v2): видно коллегам в сайдбаре, подписях
 // сообщений и выборе ответственного. Тот же стандарт поля, что у логотипа
@@ -25,7 +26,7 @@ export function ProfileAvatarCard({ user, onUserUpdated }: { user: SessionUser;
       const payload = await apiUpload<{ user: AuthenticatedUser }>("/api/v1/auth/profile/avatar/", form);
       onUserUpdated({ ...user, ...payload.user });
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось загрузить фото");
+      setErrorText(error instanceof Error ? error.message : t("profile.could_not_upload_photo"));
     } finally {
       setSaving(false);
     }
@@ -38,7 +39,7 @@ export function ProfileAvatarCard({ user, onUserUpdated }: { user: SessionUser;
       const payload = await api<{ user: AuthenticatedUser }>("/api/v1/auth/profile/avatar/", { method: "DELETE" });
       onUserUpdated({ ...user, ...payload.user });
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось удалить фото");
+      setErrorText(error instanceof Error ? error.message : t("profile.could_not_remove_photo"));
     } finally {
       setSaving(false);
     }
@@ -46,13 +47,13 @@ export function ProfileAvatarCard({ user, onUserUpdated }: { user: SessionUser;
 
   return (
     <section className="profile-card">
-      <h3>Фото</h3>
+      <h3>{t("common.photo")}</h3>
       {errorText && <div className="profile-message">{errorText}</div>}
       <div className="administration-logo-field profile-avatar-field">
         <div className="profile-avatar-preview"><Avatar user={user} /></div>
         <div className="administration-logo-copy">
           <strong>{user.fullName || user.email}</strong>
-          <span>PNG, JPEG или WebP · до 2 МБ. Видно коллегам в чате.</span>
+          <span>{t("profile.png_jpeg_or_webp_up")}</span>
           <div className="administration-logo-actions">
             <input
               ref={input}
@@ -66,12 +67,10 @@ export function ProfileAvatarCard({ user, onUserUpdated }: { user: SessionUser;
               }}
             />
             <Button variant="secondary" disabled={saving} onClick={() => input.current?.click()}>
-              {user.avatarUrl ? "Заменить" : "Загрузить"}
+              {user.avatarUrl ? t("profile.replace") : t("common.upload")}
             </Button>
             {user.avatarUrl && (
-              <Button variant="danger-outline" disabled={saving} onClick={() => setConfirmingRemoval(true)}>
-                Удалить
-              </Button>
+              <Button variant="danger-outline" disabled={saving} onClick={() => setConfirmingRemoval(true)}>{t("common.delete")}</Button>
             )}
           </div>
         </div>
@@ -81,12 +80,12 @@ export function ProfileAvatarCard({ user, onUserUpdated }: { user: SessionUser;
         onClose={() => setConfirmingRemoval(false)}
         tone="danger"
         icon="trash"
-        title="Удалить фото?"
-        description="Вместо фото коллеги снова увидят ваши инициалы."
+        title={t("profile.remove_photo")}
+        description={t("profile.colleagues_will_see_initials_again")}
         actions={(
           <>
-            <Button variant="secondary" onClick={() => setConfirmingRemoval(false)}>Отмена</Button>
-            <Button variant="danger-outline" disabled={saving} onClick={() => { setConfirmingRemoval(false); void remove(); }}>Удалить</Button>
+            <Button variant="secondary" onClick={() => setConfirmingRemoval(false)}>{t("common.cancel")}</Button>
+            <Button variant="danger-outline" disabled={saving} onClick={() => { setConfirmingRemoval(false); void remove(); }}>{t("common.delete")}</Button>
           </>
         )}
       />
diff --git a/apps/internal-ui/src/features/profile/ProfileHeader.tsx b/apps/internal-ui/src/features/profile/ProfileHeader.tsx
index 3961789..65bfd24 100644
--- a/apps/internal-ui/src/features/profile/ProfileHeader.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileHeader.tsx
@@ -2,15 +2,16 @@ import type { SessionUser } from "../../types";
 import { Avatar } from "../../shared/ui";
 import { Button } from "../../shared/ui-controls";
 import { monthYear } from "../../shared/utils";
+import { t } from "../../i18n";
 
 // Шапка «Профиля» (дизайн-базлайн v2, кадры P1/P2): фото 72 · имя с бейджем
 // роли · email, дата вступления и группы · «Выйти». Роль показана бейджем,
 // отдельного поля «Роль» в форме нет.
 
 const ROLE_LABEL: Record<SessionUser["role"], string> = {
-  OWNER: "Владелец",
-  ADMIN: "Администратор",
-  EMPLOYEE: "Сотрудник",
+  OWNER: t("common.owner"),
+  ADMIN: t("common.administrator"),
+  EMPLOYEE: t("common.operator"),
 };
 
 export function ProfileHeader({ user, compact = false, onLogout }: { user: SessionUser; compact?: boolean; onLogout: () => void }) {
@@ -26,11 +27,11 @@ export function ProfileHeader({ user, compact = false, onLogout }: { user: Sessi
         {/* Кадр M: на узком экране под именем только email. */}
         <p>
           {user.email}
-          {!compact && user.joinedAt ? ` · в организации с ${monthYear(user.joinedAt)}` : ""}
-          {!compact && groups ? ` · группы: ${groups}` : ""}
+          {!compact && user.joinedAt ? ` ${t("profile.in_organization_since", { date: monthYear(user.joinedAt) })}` : ""}
+          {!compact && groups ? ` ${t("profile.groups_list", { groups })}` : ""}
         </p>
       </div>
-      <Button icon="logout" type="button" variant="danger-outline" onClick={onLogout}>Выйти</Button>
+      <Button icon="logout" type="button" variant="danger-outline" onClick={onLogout}>{t("common.sign_out")}</Button>
     </header>
   );
 }
diff --git a/apps/internal-ui/src/features/profile/ProfileInfoForm.tsx b/apps/internal-ui/src/features/profile/ProfileInfoForm.tsx
index 39661a3..51a9eec 100644
--- a/apps/internal-ui/src/features/profile/ProfileInfoForm.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileInfoForm.tsx
@@ -5,6 +5,7 @@ import { FormField } from "../../shared/form-controls";
 import { Button } from "../../shared/ui-controls";
 import { ProfilePhotoField } from "./ProfilePhotoField";
 import type { ProfileFormState } from "./types";
+import { t } from "../../i18n";
 
 // «Личные данные» (дизайн-базлайн v2, кадр P1): фото отдельной строкой сверху,
 // затем имя и email в две колонки. Поля «Роль» здесь нет — роль показана
@@ -21,14 +22,14 @@ export function ProfileInfoForm({ profile, user, message, saving, setProfile, on
 }) {
   return (
     <form className="profile-card" onSubmit={onSubmit}>
-      <h3>Личные данные</h3>
+      <h3>{t("profile.personal_details")}</h3>
       <ProfilePhotoField user={user} onUserUpdated={onUserUpdated} />
       <div className="profile-grid">
-        <FormField label="Имя" value={profile.fullName} onChange={(value) => setProfile((current) => ({ ...current, fullName: value }))} />
-        <FormField label="Email · используется для входа" value={profile.email} onChange={(value) => setProfile((current) => ({ ...current, email: value }))} mono />
+        <FormField label={t("common.name")} value={profile.fullName} onChange={(value) => setProfile((current) => ({ ...current, fullName: value }))} />
+        <FormField label={t("profile.email_used_sign")} value={profile.email} onChange={(value) => setProfile((current) => ({ ...current, email: value }))} mono />
       </div>
       {message && <div className="profile-message">{message}</div>}
-      <div className="profile-actions"><Button type="submit" variant="primary" disabled={saving}>{saving ? "Сохранение" : "Сохранить"}</Button></div>
+      <div className="profile-actions"><Button type="submit" variant="primary" disabled={saving}>{saving ? t("common.saving") : t("common.save")}</Button></div>
     </form>
   );
 }
diff --git a/apps/internal-ui/src/features/profile/ProfileLanguageCard.tsx b/apps/internal-ui/src/features/profile/ProfileLanguageCard.tsx
new file mode 100644
index 0000000..b922de4
--- /dev/null
+++ b/apps/internal-ui/src/features/profile/ProfileLanguageCard.tsx
@@ -0,0 +1,76 @@
+import { useState } from "react";
+
+import { LANGUAGES } from "@chatballs/shared";
+
+import { api } from "../../api/client";
+import { t } from "../../i18n";
+import type { AuthenticatedUser, SessionUser } from "../../types";
+
+// «Язык» в профиле (рядом с «Внешним видом», кадр P1): личная настройка учётной
+// записи, как тема и акцент. Отдельной карточкой, а не полем «Внешнего вида»:
+// язык — не оформление, и человек ищет его глазами по слову, а не по разделу.
+//
+// Первый пункт — не язык, а отказ от выбора: «Как в организации». Сотрудник,
+// который не трогал эту настройку, поедет за организацией, когда владелец
+// сменит её язык; тот, кто выбрал явно, останется на своём.
+//
+// Подписи языков не переводятся: свой язык человек узнаёт по его собственному
+// имени, и «Русский» в английском интерфейсе — именно то, что ищет глазами
+// русскоязычный сотрудник.
+
+export function ProfileLanguageCard({ user, onUserUpdated }: { user: SessionUser; onUserUpdated: (user: SessionUser) => void }) {
+  const [saving, setSaving] = useState(false);
+  const [errorText, setErrorText] = useState("");
+
+  async function save(language: string) {
+    if (language === user.uiLanguage) return;
+    setSaving(true);
+    setErrorText("");
+    try {
+      const payload = await api<{ user: AuthenticatedUser }>("/api/v1/auth/profile/language/", {
+        method: "POST",
+        body: JSON.stringify({ language }),
+      });
+      // Смена языка перезагружает страницу (см. src/i18n): состояние здесь
+      // обновляется на случай, если язык совпал с текущим и перезагрузки нет.
+      onUserUpdated({ ...user, ...payload.user });
+    } catch (error) {
+      setErrorText(error instanceof Error ? error.message : t("common.could_not_save"));
+    } finally {
+      setSaving(false);
+    }
+  }
+
+  return (
+    <section className="profile-card language-card">
+      <h3>{t("profile.language")}</h3>
+      <p className="profile-card-lead">{t("profile.language_lead")}</p>
+      {errorText && <div className="profile-message error">{errorText}</div>}
+      <div className="appearance-row">
+        <span>{t("profile.interface_language")}</span>
+        <div className="appearance-theme-options">
+          <button
+            className={user.uiLanguage === "" ? "active" : ""}
+            disabled={saving}
+            type="button"
+            onClick={() => void save("")}
+          >
+            {t("profile.language_as_organization")}
+          </button>
+          {LANGUAGES.map((item) => (
+            <button
+              className={user.uiLanguage === item.code ? "active" : ""}
+              disabled={saving}
+              key={item.code}
+              lang={item.code}
+              type="button"
+              onClick={() => void save(item.code)}
+            >
+              {item.label}
+            </button>
+          ))}
+        </div>
+      </div>
+    </section>
+  );
+}
diff --git a/apps/internal-ui/src/features/profile/ProfileNotificationsCard.tsx b/apps/internal-ui/src/features/profile/ProfileNotificationsCard.tsx
index fc16f4b..9d45dd2 100644
--- a/apps/internal-ui/src/features/profile/ProfileNotificationsCard.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileNotificationsCard.tsx
@@ -3,6 +3,7 @@ import { useCallback, useEffect, useRef, useState } from "react";
 import { api } from "../../api/client";
 import { Icon, LogoSpinner, MaxLogo, TelegramLogo } from "../../shared/icons";
 import { Button } from "../../shared/ui-controls";
+import { t } from "../../i18n";
 
 // «Уведомления в мессенджер» (дизайн-базлайн v2, кадр P1): по строке на бота —
 // фирменная плитка, статус привязки и типы событий галочками (ADR-0015).
@@ -81,10 +82,10 @@ export function ProfileNotificationsCard() {
 
   return (
     <section className="profile-card">
-      <h3>Уведомления в мессенджер</h3>
-      <p className="profile-card-lead">Рабочие события приходят и при закрытом браузере. Один мессенджер: привязка нового заменяет текущий.</p>
+      <h3>{t("profile.messenger_notifications")}</h3>
+      <p className="profile-card-lead">{t("profile.work_events_reach_even_with")}</p>
       {loaded && items.length === 0 && (
-        <p className="profile-notifications-note">Боты уведомлений не настроены. Владелец может добавить бота в «Настройках» → «Интеграции» (флажок «Бот уведомлений для сотрудников»).</p>
+        <p className="profile-notifications-note">{t("profile.no_notification_bots_configured_owner")}</p>
       )}
       {items.map((item) => (
         <div className="profile-notifications-block" key={item.integrationId}>
@@ -94,19 +95,18 @@ export function ProfileNotificationsCard() {
             </span>
             <div className="profile-notifications-name">
               <strong>{PROVIDER_LABEL[item.provider] ?? item.provider}</strong>
-              <small>{item.botUsername ? `@${item.botUsername} · сервисный бот уведомлений` : item.name}</small>
+              <small>{item.botUsername ? t("profile.service_notification_bot", { username: item.botUsername }) : item.name}</small>
             </div>
             {item.bound ? (
               <>
-                <b className="profile-notifications-status">Подключено</b>
-                <Button variant="secondary" disabled={busy} onClick={() => void disconnect(item)}>Отключить</Button>
+                <b className="profile-notifications-status">{t("common.connected")}</b>
+                <Button variant="secondary" disabled={busy} onClick={() => void disconnect(item)}>{t("profile.disconnect")}</Button>
               </>
             ) : links[item.integrationId]?.deepLink ? (
-              <a className="profile-notifications-bind" href={links[item.integrationId].deepLink} target="_blank" rel="noreferrer">
-                Привязать бота<Icon name="external" size={12} strokeWidth={2.2} />
+              <a className="profile-notifications-bind" href={links[item.integrationId].deepLink} target="_blank" rel="noreferrer">{t("profile.link_bot")}<Icon name="external" size={12} strokeWidth={2.2} />
               </a>
             ) : (
-              <span className="profile-notifications-wait">{loaded ? "Готовим ссылку…" : <LogoSpinner size={16} />}</span>
+              <span className="profile-notifications-wait">{loaded ? t("profile.preparing_link") : <LogoSpinner size={16} />}</span>
             )}
           </div>
           {item.bound && types.length > 0 && (
@@ -126,7 +126,7 @@ export function ProfileNotificationsCard() {
         </div>
       ))}
       {hasUnbound && (
-        <p className="profile-notifications-note">Нажмите «Привязать бота» и в открывшемся чате — «Начать»: привязка подтвердится сама.</p>
+        <p className="profile-notifications-note">{t("profile.press_link_bot_then_start")}</p>
       )}
     </section>
   );
diff --git a/apps/internal-ui/src/features/profile/ProfilePage.tsx b/apps/internal-ui/src/features/profile/ProfilePage.tsx
index 60a4220..a16e93d 100644
--- a/apps/internal-ui/src/features/profile/ProfilePage.tsx
+++ b/apps/internal-ui/src/features/profile/ProfilePage.tsx
@@ -8,11 +8,13 @@ import { fetchProfileSessions } from "./model";
 import { ProfileAppearanceCard } from "./ProfileAppearanceCard";
 import { ProfileHeader } from "./ProfileHeader";
 import { ProfileInfoForm } from "./ProfileInfoForm";
+import { ProfileLanguageCard } from "./ProfileLanguageCard";
 import { ProfileNotificationsCard } from "./ProfileNotificationsCard";
 import { ProfilePasswordForm } from "./ProfilePasswordForm";
 import { ProfileSessionsCard } from "./ProfileSessionsCard";
 import { ProfileTotpCard } from "./ProfileTotpCard";
 import { useProfilePage } from "./useProfilePage";
+import { t } from "../../i18n";
 
 // «Профиль» — отдельная страница из меню пользователя (дизайн-базлайн v2,
 // кадры P1/P2): слева «кто я и как выглядит интерфейс», справа безопасность.
@@ -21,10 +23,10 @@ import { useProfilePage } from "./useProfilePage";
 type MobileSection = "notifications" | "password" | "totp" | "sessions";
 
 const MOBILE_TITLE: Record<MobileSection, string> = {
-  notifications: "Уведомления в мессенджер",
-  password: "Смена пароля",
-  totp: "Двухфакторная аутентификация",
-  sessions: "Активные сессии",
+  notifications: t("profile.messenger_notifications"),
+  password: t("profile.change_password"),
+  totp: t("profile.two_factor_authentication"),
+  sessions: t("common.active_sessions"),
 };
 
 export function ProfilePage({ user, onUserUpdated, reload, onLogout, onBack }: { user: SessionUser; onUserUpdated: (user: SessionUser) => void; reload: () => void; onLogout: () => void; onBack: () => void }) {
@@ -46,9 +48,9 @@ export function ProfilePage({ user, onUserUpdated, reload, onLogout, onBack }: {
     return (
       <div className="profile-page is-mobile">
         <div className="profile-mobile-bar">
-          <button type="button" aria-label="Назад" onClick={() => (section ? setSection(null) : onBack())}><Icon name="chevronLeft" size={20} strokeWidth={2} /></button>
-          <h2>{section ? MOBILE_TITLE[section] : "Профиль"}</h2>
-          {!section && <button className="profile-mobile-logout" type="button" onClick={onLogout}>Выйти</button>}
+          <button type="button" aria-label={t("profile.back")} onClick={() => (section ? setSection(null) : onBack())}><Icon name="chevronLeft" size={20} strokeWidth={2} /></button>
+          <h2>{section ? MOBILE_TITLE[section] : t("common.profile")}</h2>
+          {!section && <button className="profile-mobile-logout" type="button" onClick={onLogout}>{t("common.sign_out")}</button>}
         </div>
         <div className="profile-mobile-body">
           {section === "notifications" && <ProfileNotificationsCard />}
@@ -60,10 +62,11 @@ export function ProfilePage({ user, onUserUpdated, reload, onLogout, onBack }: {
               <ProfileHeader user={user} compact onLogout={onLogout} />
               <ProfileInfoForm profile={page.profile} user={user} message={page.profileMessage} saving={page.savingProfile} setProfile={page.setProfile} onUserUpdated={onUserUpdated} onSubmit={page.saveProfile} />
               <ProfileAppearanceCard user={user} onUserUpdated={onUserUpdated} />
+              <ProfileLanguageCard user={user} onUserUpdated={onUserUpdated} />
               <div className="profile-mobile-list">
                 <MobileLink label={MOBILE_TITLE.notifications} value={summary.messenger} tone="ok" onOpen={() => setSection("notifications")} />
                 <MobileLink label={MOBILE_TITLE.password} onOpen={() => setSection("password")} />
-                <MobileLink label={MOBILE_TITLE.totp} value={user.totpEnabled ? "Вкл" : "Выкл"} onOpen={() => setSection("totp")} />
+                <MobileLink label={MOBILE_TITLE.totp} value={user.totpEnabled ? t("common.on_2") : t("common.off_2")} onOpen={() => setSection("totp")} />
                 <MobileLink label={MOBILE_TITLE.sessions} value={summary.sessions ? String(summary.sessions) : ""} onOpen={() => setSection("sessions")} />
               </div>
             </>
@@ -80,6 +83,7 @@ export function ProfilePage({ user, onUserUpdated, reload, onLogout, onBack }: {
         <div className="profile-column">
           <ProfileInfoForm profile={page.profile} user={user} message={page.profileMessage} saving={page.savingProfile} setProfile={page.setProfile} onUserUpdated={onUserUpdated} onSubmit={page.saveProfile} />
           <ProfileAppearanceCard user={user} onUserUpdated={onUserUpdated} />
+          <ProfileLanguageCard user={user} onUserUpdated={onUserUpdated} />
           <ProfileNotificationsCard />
         </div>
         <div className="profile-column">{security}</div>
diff --git a/apps/internal-ui/src/features/profile/ProfilePasswordForm.tsx b/apps/internal-ui/src/features/profile/ProfilePasswordForm.tsx
index 429d150..860beb8 100644
--- a/apps/internal-ui/src/features/profile/ProfilePasswordForm.tsx
+++ b/apps/internal-ui/src/features/profile/ProfilePasswordForm.tsx
@@ -3,6 +3,7 @@ import type { Dispatch, FormEvent, SetStateAction } from "react";
 import { FormField } from "../../shared/form-controls";
 import { Button } from "../../shared/ui-controls";
 import type { PasswordFormState } from "./types";
+import { t } from "../../i18n";
 
 // «Смена пароля» (дизайн-базлайн v2, кадр P1): три поля столбиком, кнопка
 // справа внизу — вторичная, активна только когда форма заполнена.
@@ -10,15 +11,15 @@ import type { PasswordFormState } from "./types";
 export function ProfilePasswordForm({ passwords, message, mismatch, ready, saving, setPasswords, onSubmit }: { passwords: PasswordFormState; message: string; mismatch: boolean; ready: boolean; saving: boolean; setPasswords: Dispatch<SetStateAction<PasswordFormState>>; onSubmit: (event: FormEvent) => void }) {
   return (
     <form className="profile-card" onSubmit={onSubmit}>
-      <h3>Смена пароля</h3>
+      <h3>{t("profile.change_password")}</h3>
       <div className="password-fields">
-        <FormField label="Текущий пароль" value={passwords.current} onChange={(value) => setPasswords((current) => ({ ...current, current: value }))} type="password" />
-        <FormField label="Новый пароль" value={passwords.next} onChange={(value) => setPasswords((current) => ({ ...current, next: value }))} placeholder="мин. 10 символов" type="password" />
-        <FormField label="Повторите новый пароль" value={passwords.repeat} onChange={(value) => setPasswords((current) => ({ ...current, repeat: value }))} type="password" />
+        <FormField label={t("profile.current_password")} value={passwords.current} onChange={(value) => setPasswords((current) => ({ ...current, current: value }))} type="password" />
+        <FormField label={t("common.new_password")} value={passwords.next} onChange={(value) => setPasswords((current) => ({ ...current, next: value }))} placeholder={t("profile.min_10_characters")} type="password" />
+        <FormField label={t("common.repeat_new_password")} value={passwords.repeat} onChange={(value) => setPasswords((current) => ({ ...current, repeat: value }))} type="password" />
       </div>
-      {mismatch && <div className="profile-message error">Пароли не совпадают</div>}
+      {mismatch && <div className="profile-message error">{t("common.passwords_do_not_match")}</div>}
       {message && <div className="profile-message">{message}</div>}
-      <div className="profile-actions"><Button type="submit" variant="secondary" disabled={!ready || saving}>{saving ? "Обновление" : "Обновить пароль"}</Button></div>
+      <div className="profile-actions"><Button type="submit" variant="secondary" disabled={!ready || saving}>{saving ? t("profile.updating") : t("profile.update_password")}</Button></div>
     </form>
   );
 }
diff --git a/apps/internal-ui/src/features/profile/ProfilePhotoField.tsx b/apps/internal-ui/src/features/profile/ProfilePhotoField.tsx
index ee801b9..2aa0a0f 100644
--- a/apps/internal-ui/src/features/profile/ProfilePhotoField.tsx
+++ b/apps/internal-ui/src/features/profile/ProfilePhotoField.tsx
@@ -5,6 +5,7 @@ import { DecisionDialog } from "../../shared/DecisionDialog";
 import { Avatar } from "../../shared/ui";
 import { Button } from "../../shared/ui-controls";
 import type { AuthenticatedUser, SessionUser } from "../../types";
+import { t } from "../../i18n";
 
 // Строка «Фото» внутри карточки «Личные данные» (дизайн-базлайн v2, кадр P1):
 // круглое превью 56 · подпись · «Заменить» и «Удалить». Видно коллегам в чате,
@@ -25,7 +26,7 @@ export function ProfilePhotoField({ user, onUserUpdated }: { user: SessionUser;
       const payload = await apiUpload<{ user: AuthenticatedUser }>("/api/v1/auth/profile/avatar/", form);
       onUserUpdated({ ...user, ...payload.user });
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось загрузить фото");
+      setErrorText(error instanceof Error ? error.message : t("profile.could_not_upload_photo"));
     } finally {
       setSaving(false);
     }
@@ -38,7 +39,7 @@ export function ProfilePhotoField({ user, onUserUpdated }: { user: SessionUser;
       const payload = await api<{ user: AuthenticatedUser }>("/api/v1/auth/profile/avatar/", { method: "DELETE" });
       onUserUpdated({ ...user, ...payload.user });
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось удалить фото");
+      setErrorText(error instanceof Error ? error.message : t("profile.could_not_remove_photo"));
     } finally {
       setSaving(false);
     }
@@ -48,8 +49,8 @@ export function ProfilePhotoField({ user, onUserUpdated }: { user: SessionUser;
     <div className="profile-photo-field">
       <span className="profile-photo-preview"><Avatar user={user} /></span>
       <div className="profile-photo-copy">
-        <strong>Фото</strong>
-        <small>PNG, JPEG или WebP · до 2 МБ. Видно коллегам в чате, подписях сообщений и выборе ответственного.</small>
+        <strong>{t("common.photo")}</strong>
+        <small>{t("profile.png_jpeg_or_webp_up_2")}</small>
         {errorText && <small className="profile-photo-error">{errorText}</small>}
       </div>
       <div className="profile-photo-actions">
@@ -64,20 +65,20 @@ export function ProfilePhotoField({ user, onUserUpdated }: { user: SessionUser;
             event.target.value = "";
           }}
         />
-        <Button variant="secondary" disabled={saving} onClick={() => input.current?.click()}>Заменить</Button>
-        <button className="profile-photo-remove" type="button" disabled={saving || !user.avatarUrl} onClick={() => setConfirmingRemoval(true)}>Удалить</button>
+        <Button variant="secondary" disabled={saving} onClick={() => input.current?.click()}>{t("profile.replace")}</Button>
+        <button className="profile-photo-remove" type="button" disabled={saving || !user.avatarUrl} onClick={() => setConfirmingRemoval(true)}>{t("common.delete")}</button>
       </div>
       <DecisionDialog
         open={confirmingRemoval}
         onClose={() => setConfirmingRemoval(false)}
         tone="danger"
         icon="trash"
-        title="Удалить фото?"
-        description="Вместо фото коллеги снова увидят ваши инициалы."
+        title={t("profile.remove_photo")}
+        description={t("profile.colleagues_will_see_initials_again")}
         actions={(
           <>
-            <Button variant="secondary" onClick={() => setConfirmingRemoval(false)}>Отмена</Button>
-            <Button variant="danger-outline" disabled={saving} onClick={() => { setConfirmingRemoval(false); void remove(); }}>Удалить</Button>
+            <Button variant="secondary" onClick={() => setConfirmingRemoval(false)}>{t("common.cancel")}</Button>
+            <Button variant="danger-outline" disabled={saving} onClick={() => { setConfirmingRemoval(false); void remove(); }}>{t("common.delete")}</Button>
           </>
         )}
       />
diff --git a/apps/internal-ui/src/features/profile/ProfileSessionsCard.tsx b/apps/internal-ui/src/features/profile/ProfileSessionsCard.tsx
index e4ba4e8..89d2103 100644
--- a/apps/internal-ui/src/features/profile/ProfileSessionsCard.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileSessionsCard.tsx
@@ -3,6 +3,7 @@ import { useCallback, useEffect, useState } from "react";
 import { Icon } from "../../shared/icons";
 import { Button } from "../../shared/ui-controls";
 import { fetchProfileSessions, lastSeenLabel, type ProfileSession } from "./model";
+import { t } from "../../i18n";
 
 // «Активные сессии» (дизайн-базлайн v2, кадр P1): устройство, частично скрытый
 // адрес и когда сессия была активна; текущая помечена бейджем.
@@ -32,9 +33,9 @@ export function ProfileSessionsCard({ message, revoking, onRevoke }: { message:
   return (
     <section className="profile-card sessions-card">
       <div className="sessions-head">
-        <h3>Активные сессии</h3>
+        <h3>{t("common.active_sessions")}</h3>
         <Button className="sessions-revoke" type="button" variant="danger-outline" onClick={onRevoke} disabled={revoking || items.length < 2}>
-          {revoking ? "Завершение" : "Завершить другие"}
+          {revoking ? t("profile.ending") : t("profile.end_others")}
         </Button>
       </div>
       {message && <div className="profile-message sessions">{message}</div>}
@@ -46,9 +47,9 @@ export function ProfileSessionsCard({ message, revoking, onRevoke }: { message:
             <span className="session-icon"><Icon name={KIND_ICON[session.kind]} size={16} strokeWidth={1.9} /></span>
             <span className="session-main">
               <strong>{session.device}</strong>
-              <small>{where || "адрес неизвестен"}</small>
+              <small>{where || t("profile.address_unknown")}</small>
             </span>
-            {session.current ? <b className="session-current">текущая</b> : <small className="session-time">{seen}</small>}
+            {session.current ? <b className="session-current">{t("profile.current")}</b> : <small className="session-time">{seen}</small>}
           </div>
         );
       })}
diff --git a/apps/internal-ui/src/features/profile/ProfileTotpCard.tsx b/apps/internal-ui/src/features/profile/ProfileTotpCard.tsx
index 6b6b7d7..6e19191 100644
--- a/apps/internal-ui/src/features/profile/ProfileTotpCard.tsx
+++ b/apps/internal-ui/src/features/profile/ProfileTotpCard.tsx
@@ -2,6 +2,7 @@ import type { SessionUser } from "../../types";
 import { SwitchButton } from "../../shared/form-controls";
 import { Icon } from "../../shared/icons";
 import { lastSeenLabel } from "./model";
+import { t } from "../../i18n";
 
 // «Двухфакторная аутентификация» (дизайн-базлайн v2, кадр P1): описание слева,
 // переключатель справа, ниже — полоса состояния: зелёная при включённой 2FA,
@@ -14,22 +15,22 @@ export function ProfileTotpCard({ user, message, saving, onToggle }: { user: Ses
     <section className="profile-card totp-card">
       <div className="totp-head">
         <div>
-          <h3>Двухфакторная аутентификация</h3>
+          <h3>{t("profile.two_factor_authentication")}</h3>
           <p>
             {enabled
-              ? "Включена. Код из приложения-аутентификатора запрашивается при каждом входе."
-              : "Отключена. Для владельца и администраторов настоятельно рекомендуется включить."}
+              ? t("profile.code_from_authenticator_app_required")
+              : t("profile.off_strongly_recommended_owner_administrators")}
           </p>
         </div>
-        <SwitchButton checked={enabled} className="ui-switch is-large" label="Переключить двухфакторную аутентификацию" onClick={onToggle} disabled={saving} />
+        <SwitchButton checked={enabled} className="ui-switch is-large" label={t("profile.toggle_two_factor_authentication")} onClick={onToggle} disabled={saving} />
       </div>
       {message && <div className="profile-message">{message}</div>}
       <div className={`security-note ${enabled ? "ok" : "warning"}`}>
         <Icon name={enabled ? "check" : "warning"} size={15} strokeWidth={2.2} />
         <span>
           {enabled
-            ? `Аутентификатор подключён${lastUsed ? ` · последний код принят ${lastUsed}` : ""}`
-            : "Без второго фактора доступ к организации защищён только паролем"}
+            ? (lastUsed ? t("profile.authenticator_last_used", { date: lastUsed }) : t("profile.authenticator_connected"))
+            : t("profile.without_second_factor_access_organization")}
         </span>
       </div>
     </section>
diff --git a/apps/internal-ui/src/features/profile/model.ts b/apps/internal-ui/src/features/profile/model.ts
index 2496654..5beebd4 100644
--- a/apps/internal-ui/src/features/profile/model.ts
+++ b/apps/internal-ui/src/features/profile/model.ts
@@ -1,4 +1,5 @@
 import { api } from "../../api/client";
+import { t } from "../../i18n";
 
 // Активные сессии учётной записи (дизайн-базлайн v2, кадр P1): устройство,
 // частично скрытый адрес и когда сессия была активна.
@@ -22,10 +23,10 @@ export function lastSeenLabel(value: string | null, now = new Date()): string {
   const seen = new Date(value);
   if (Number.isNaN(seen.getTime())) return "";
   const minutes = Math.max(0, Math.round((now.getTime() - seen.getTime()) / 60000));
-  if (minutes < 2) return "сейчас";
-  if (minutes < 60) return `${minutes} мин назад`;
+  if (minutes < 2) return t("common.just_now");
+  if (minutes < 60) return t("time.minutes_ago", { count: minutes });
   const hours = Math.round(minutes / 60);
-  if (hours < 24) return `${hours} ч назад`;
+  if (hours < 24) return t("time.hours_ago", { count: hours });
   const days = Math.round(hours / 24);
-  return days === 1 ? "вчера" : `${days} дн. назад`;
+  return days === 1 ? t("common.yesterday") : t("time.days_ago", { count: days });
 }
diff --git a/apps/internal-ui/src/features/profile/useProfilePage.ts b/apps/internal-ui/src/features/profile/useProfilePage.ts
index e41cdbd..c63ce82 100644
--- a/apps/internal-ui/src/features/profile/useProfilePage.ts
+++ b/apps/internal-ui/src/features/profile/useProfilePage.ts
@@ -3,6 +3,7 @@ import { type FormEvent, useEffect, useState } from "react";
 import { api } from "../../api/client";
 import { passwordIsValid } from "../auth/password";
 import type { SessionUser } from "../../types";
+import { t } from "../../i18n";
 
 type UserPayload = { authenticated: true; user: SessionUser };
 
@@ -35,9 +36,9 @@ export function useProfilePage({ user, onUserUpdated, reload }: { user: SessionU
       });
       onUserUpdated(payload.user);
       reload();
-      setProfileMessage("Личные данные сохранены");
+      setProfileMessage(t("profile.personal_details_saved"));
     } catch (error) {
-      setProfileMessage(error instanceof Error ? error.message : "Не удалось сохранить профиль");
+      setProfileMessage(error instanceof Error ? error.message : t("profile.could_not_save_profile"));
     } finally {
       setSavingProfile(false);
     }
@@ -55,9 +56,9 @@ export function useProfilePage({ user, onUserUpdated, reload }: { user: SessionU
       });
       onUserUpdated(payload.user);
       setPasswords({ current: "", next: "", repeat: "" });
-      setPasswordMessage(payload.revoked > 0 ? `Пароль обновлён, завершено сессий: ${payload.revoked}` : "Пароль обновлён");
+      setPasswordMessage(payload.revoked > 0 ? t("profile.password_updated_sessions", { count: payload.revoked }) : t("profile.password_updated"));
     } catch (error) {
-      setPasswordMessage(error instanceof Error ? error.message : "Не удалось обновить пароль");
+      setPasswordMessage(error instanceof Error ? error.message : t("profile.could_not_update_password"));
     } finally {
       setSavingPassword(false);
     }
@@ -69,7 +70,7 @@ export function useProfilePage({ user, onUserUpdated, reload }: { user: SessionU
     try {
       if (user.totpEnabled) {
         if (!passwords.current) {
-          setTotpMessage("Введите текущий пароль в блоке смены пароля, чтобы отключить TOTP");
+          setTotpMessage(t("profile.enter_current_password_change_password"));
           return;
         }
         const payload = await api<UserPayload & { revoked: number }>("/api/v1/auth/profile/totp/disable/", {
@@ -77,13 +78,13 @@ export function useProfilePage({ user, onUserUpdated, reload }: { user: SessionU
           body: JSON.stringify({ currentPassword: passwords.current }),
         });
         onUserUpdated(payload.user);
-        setTotpMessage(payload.revoked > 0 ? `TOTP отключена, завершено сессий: ${payload.revoked}` : "TOTP отключена");
+        setTotpMessage(payload.revoked > 0 ? t("profile.totp_off_sessions", { count: payload.revoked }) : t("profile.totp_turned_off"));
       } else {
         const payload = await api<UserPayload>("/api/v1/auth/profile/totp/start/", { method: "POST" });
         onUserUpdated(payload.user);
       }
     } catch (error) {
-      setTotpMessage(error instanceof Error ? error.message : "Не удалось изменить TOTP");
+      setTotpMessage(error instanceof Error ? error.message : t("profile.could_not_change_totp"));
     } finally {
       setSavingTotp(false);
     }
@@ -94,9 +95,9 @@ export function useProfilePage({ user, onUserUpdated, reload }: { user: SessionU
     setSessionsMessage("");
     try {
       const payload = await api<{ revoked: number }>("/api/v1/auth/profile/sessions/revoke-other/", { method: "POST" });
-      setSessionsMessage(payload.revoked > 0 ? `Завершено сессий: ${payload.revoked}` : "Других активных сессий нет");
+      setSessionsMessage(payload.revoked > 0 ? t("profile.sessions_ended_count", { count: payload.revoked }) : t("profile.there_no_other_active_sessions"));
     } catch (error) {
-      setSessionsMessage(error instanceof Error ? error.message : "Не удалось завершить сессии");
+      setSessionsMessage(error instanceof Error ? error.message : t("profile.could_not_end_sessions"));
     } finally {
       setRevokingSessions(false);
     }
diff --git a/apps/internal-ui/src/features/sales/SalesClientsPage.tsx b/apps/internal-ui/src/features/sales/SalesClientsPage.tsx
index 44104c3..2bb8b14 100644
--- a/apps/internal-ui/src/features/sales/SalesClientsPage.tsx
+++ b/apps/internal-ui/src/features/sales/SalesClientsPage.tsx
@@ -10,6 +10,7 @@ import { fetchClientsForExport, fetchClientsTotal } from "./clients/api";
 import { exportClientsCsv } from "./clients/exportClientsCsv";
 import { toSalesClient, toSalesClientRow } from "./clients/model";
 import { useSalesClients } from "./clients/useSalesClients";
+import { t } from "../../i18n";
 
 // «Контакты» (дизайн-базлайн v2, кадры K1/K2/S1). Страница списка — серверная.
 export function SalesClientsPage({ openClient, openIntegrations }: { openClient: (id: number) => void; openIntegrations: () => void }) {
@@ -34,7 +35,7 @@ export function SalesClientsPage({ openClient, openIntegrations }: { openClient:
     return <div className="sales-clients-page"><LoadingState /></div>;
   }
   if (clients.errorText) {
-    return <div className="sales-clients-page"><EmptyState title="Не удалось загрузить контакты" /></div>;
+    return <div className="sales-clients-page"><EmptyState title={t("sales.could_not_load_contacts")} /></div>;
   }
 
   return (
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientAuditTab.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientAuditTab.tsx
index cd5e7b1..91a3d32 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientAuditTab.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientAuditTab.tsx
@@ -1,18 +1,19 @@
 import { EmptyState } from "../../../shared/ui";
 import type { ClientDetailVm } from "./model";
+import { t } from "../../../i18n";
 
 export function SalesClientAuditTab({ audit }: { audit: ClientDetailVm["audit"] }) {
-  if (audit.length === 0) return <EmptyState title="Пока нет событий" />;
+  if (audit.length === 0) return <EmptyState title={t("sales.no_events_yet")} />;
   return (
     <div className="sales-client-table-card">
       <table className="sales-client-detail-table">
         <thead>
           <tr>
-            <th>Время</th>
-            <th>Действие</th>
-            <th>Объект</th>
-            <th>Сотрудник</th>
-            <th>Результат</th>
+            <th>{t("admin.time")}</th>
+            <th>{t("common.action")}</th>
+            <th>{t("common.object")}</th>
+            <th>{t("common.operator")}</th>
+            <th>{t("admin.result")}</th>
           </tr>
         </thead>
         <tbody>
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientDetailPage.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientDetailPage.tsx
index b68ad4d..697a640 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientDetailPage.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientDetailPage.tsx
@@ -9,6 +9,7 @@ import { SalesClientHeader } from "./SalesClientHeader";
 import { SalesClientIdentitiesTab } from "./SalesClientIdentitiesTab";
 import { SalesClientOverviewTab } from "./SalesClientOverviewTab";
 import { useClientDetail } from "./useClientDetail";
+import { t } from "../../../i18n";
 
 // Карточка контакта (кадры K3–K5): возврат к списку, шапка, вкладки
 // Обзор · Диалоги · Идентификаторы · Аудит.
@@ -17,11 +18,11 @@ export function SalesClientDetailPage({ contactId, canEdit = false, canMerge = f
   const { client, loading, error, save, merge } = useClientDetail(contactId);
 
   if (loading) return <div className="sales-client-page"><LoadingState /></div>;
-  if (error || !client) return <div className="sales-client-page"><EmptyState title="Не удалось загрузить контакт" /></div>;
+  if (error || !client) return <div className="sales-client-page"><EmptyState title={t("sales.could_not_load_contact")} /></div>;
 
   return (
     <div className="sales-client-page">
-      <BackLink label="Контакты" onClick={openClients} />
+      <BackLink label={t("common.contacts")} onClick={openClients} />
       <SalesClientHeader client={client} canEdit={canEdit} openConversation={openConversation} onSave={save} />
       <UnderlineTabs className="sales-client-detail-tabs" items={clientDetailTabsOf(client)} value={tab} onChange={setTab} />
       {tab === "overview" && <SalesClientOverviewTab client={client} openConversation={openConversation} />}
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientDialogsTab.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientDialogsTab.tsx
index f4d77eb..623cf77 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientDialogsTab.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientDialogsTab.tsx
@@ -1,11 +1,12 @@
 import { Icon } from "../../../shared/icons";
 import { EmptyState } from "../../../shared/ui";
 import type { ClientDetailVm } from "./model";
+import { t } from "../../../i18n";
 
 // Вкладка «Диалоги» (кадр K4): тема и превью · агент · канал · группа ·
 // статус · дата. Клик открывает диалог в чате.
 export function SalesClientDialogsTab({ dialogs, openConversation }: { dialogs: ClientDetailVm["dialogs"]; openConversation: (conversationId: number) => void }) {
-  if (dialogs.length === 0) return <EmptyState title="У контакта ещё нет диалогов" />;
+  if (dialogs.length === 0) return <EmptyState title={t("sales.contact_has_no_conversations_yet")} />;
   return (
     <div className="sales-client-dialogs">
       {dialogs.map((dialog) => (
@@ -22,7 +23,7 @@ export function SalesClientDialogsTab({ dialogs, openConversation }: { dialogs:
             {dialog.channelLabel && <em>· {dialog.channelLabel}</em>}
           </span>
           <span className="sales-client-dialog-group">
-            {dialog.groupName ? <><i style={{ background: dialog.groupColor }} />{dialog.groupName}</> : <em>Без группы</em>}
+            {dialog.groupName ? <><i style={{ background: dialog.groupColor }} />{dialog.groupName}</> : <em>{t("common.no_group")}</em>}
           </span>
           <b style={{ background: dialog.modeBg, color: dialog.modeColor }}>{dialog.modeLabel}</b>
           <small>{dialog.time}</small>
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientHeader.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientHeader.tsx
index f777f78..a20c83b 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientHeader.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientHeader.tsx
@@ -7,6 +7,7 @@ import { Button, CopyButton } from "../../../shared/ui-controls";
 import { ContactAvatar } from "../../conversations/ContactAvatar";
 import { ContactEditForm, type ContactCardFields } from "../../conversations/ContactEditForm";
 import type { ClientDetailVm } from "./model";
+import { t } from "../../../i18n";
 
 // Шапка карточки контакта (кадр K3): аватар 64 · имя · CID · карандаш ·
 // описание · телефон/email/компания/город с «копировать» · бейджи каналов ·
@@ -24,7 +25,7 @@ export function SalesClientHeader({ client, canEdit = false, openConversation, o
   ].filter(Boolean) as Array<{ icon: "phone" | "mail" | "building" | "pin"; value: string }>;
 
   const menuItems = [
-    { key: "copy-cid", label: <button type="button" onClick={() => { setMenuOpen(false); void navigator.clipboard?.writeText(client.cid); }}><Icon name="copy" size={15} />Скопировать CID</button> },
+    { key: "copy-cid", label: <button type="button" onClick={() => { setMenuOpen(false); void navigator.clipboard?.writeText(client.cid); }}><Icon name="copy" size={15} />{t("sales.copy_cid")}</button> },
   ];
 
   return (
@@ -34,7 +35,7 @@ export function SalesClientHeader({ client, canEdit = false, openConversation, o
         <div className="sales-client-detail-name-row">
           <h2>{client.name}</h2>
           <code>{client.cid}</code>
-          {canEdit && onSave && !editing && <button className="sales-client-edit" type="button" title="Редактировать" aria-label="Редактировать контакт" onClick={() => setEditing(true)}><Icon name="edit" size={14} /></button>}
+          {canEdit && onSave && !editing && <button className="sales-client-edit" type="button" title={t("common.edit_item")} aria-label={t("sales.edit_contact")} onClick={() => setEditing(true)}><Icon name="edit" size={14} /></button>}
         </div>
         {editing && onSave ? (
           <ContactEditForm
@@ -67,9 +68,9 @@ export function SalesClientHeader({ client, canEdit = false, openConversation, o
       </div>
       {!editing && (
         <div className="sales-client-detail-actions">
-          <Button icon="message" variant="primary" disabled={!targetDialog} onClick={() => targetDialog && openConversation(targetDialog.id)}>Открыть диалог</Button>
+          <Button icon="message" variant="primary" disabled={!targetDialog} onClick={() => targetDialog && openConversation(targetDialog.id)}>{t("sales.open_conversation")}</Button>
           <Dropdown menu={{ items: menuItems }} open={menuOpen} onOpenChange={setMenuOpen} trigger={["click"]} overlayClassName="app-dropdown is-wide">
-            <button className="sales-client-more" type="button" aria-label="Действия контакта"><Icon name="more" size={17} /></button>
+            <button className="sales-client-more" type="button" aria-label={t("sales.contact_actions")}><Icon name="more" size={17} /></button>
           </Dropdown>
         </div>
       )}
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientIdentitiesTab.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientIdentitiesTab.tsx
index 6155b6a..335ed2a 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientIdentitiesTab.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientIdentitiesTab.tsx
@@ -6,6 +6,7 @@ import { Button } from "../../../shared/ui-controls";
 import { EmptyState } from "../../../shared/ui";
 import { SalesClientMergeDialog } from "./SalesClientMergeDialog";
 import type { ClientDetailVm } from "./model";
+import { t } from "../../../i18n";
 
 // Вкладка «Идентификаторы» (кадр K5): идентичности по подключениям и, справа,
 // предложение объединения. Объединять может только владелец (ADR-CHATBALLS-0006) —
@@ -28,14 +29,14 @@ export function SalesClientIdentitiesTab({ client, canMerge, openClient, onMerge
       await action();
       done();
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось выполнить операцию");
+      setError(caught instanceof Error ? caught.message : t("sales.could_not_complete_operation"));
     } finally {
       setSaving(false);
     }
   }
 
   if (client.identities.length === 0) {
-    return <EmptyState title="Нет идентификаторов подключений" />;
+    return <EmptyState title={t("sales.no_connection_identities")} />;
   }
 
   const rail = Boolean(client.duplicate);
@@ -55,17 +56,17 @@ export function SalesClientIdentitiesTab({ client, canMerge, openClient, onMerge
             <b className={identity.confirmed ? "is-ok" : ""}>{identity.status}</b>
           </div>
         ))}
-        <p>Идентичности разных подключений не объединяются автоматически. Подтверждённой считается только та, что подключение отдало с проверенным телефоном.</p>
+        <p>{t("sales.identities_from_different_connections_not")}</p>
       </div>
       {rail && (
         <div className="sales-client-ids-rail">
           {client.duplicate && (
             <section className="sales-client-section-card sales-client-duplicate">
               <div className="sales-client-duplicate-head">
-                <h3>Возможный дубликат</h3>
-                <b>предложение</b>
+                <h3>{t("sales.possible_duplicate")}</h3>
+                <b>{t("sales.suggestion")}</b>
               </div>
-              <p>Совпадает телефон{client.duplicate.phoneVerified ? ", подтверждённый подключением" : " (не подтверждён подключением)"}. Объединение перенесёт идентичности и диалоги; операция аудируется и требует причины.</p>
+              <p>{t("sales.phone_matches", { confirmed: client.duplicate.phoneVerified ? t("sales.confirmed_by_connection") : ` ${t("sales.not_confirmed_by_connection")}` })}. Объединение перенесёт идентичности и диалоги; операция аудируется и требует причины.</p>
               <div className="sales-client-duplicate-row">
                 <ContactAvatar avatarUrl={client.duplicate.avatarUrl || undefined} initials={client.duplicate.initials} background="var(--n-4)" className="sales-client-duplicate-avatar" />
                 <span>
@@ -75,11 +76,11 @@ export function SalesClientIdentitiesTab({ client, canMerge, openClient, onMerge
               </div>
               <div className="sales-client-duplicate-actions">
                 {canMerge
-                  ? <Button variant="primary" onClick={() => { setError(""); setMerging(true); }}>Сравнить и объединить</Button>
-                  : <Button variant="primary" onClick={() => openClient(client.duplicate!.id)}>Открыть и сравнить</Button>}
-                <Button variant="secondary" onClick={() => openClient(client.duplicate!.id)}>Не то</Button>
+                  ? <Button variant="primary" onClick={() => { setError(""); setMerging(true); }}>{t("sales.compare_merge")}</Button>
+                  : <Button variant="primary" onClick={() => openClient(client.duplicate!.id)}>{t("sales.open_compare")}</Button>}
+                <Button variant="secondary" onClick={() => openClient(client.duplicate!.id)}>{t("sales.not_match")}</Button>
               </div>
-              {!canMerge && <small className="sales-client-duplicate-note">Объединять контакты может только владелец.</small>}
+              {!canMerge && <small className="sales-client-duplicate-note">{t("sales.only_owner_can_merge_contacts")}</small>}
             </section>
           )}
         </div>
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientMergeDialog.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientMergeDialog.tsx
index 75932a4..57c4267 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientMergeDialog.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientMergeDialog.tsx
@@ -3,6 +3,7 @@ import { useState } from "react";
 import { DecisionDialog } from "../../../shared/DecisionDialog";
 import { Button } from "../../../shared/ui-controls";
 import type { ClientDetailVm } from "./model";
+import { t } from "../../../i18n";
 
 // Сравнение и объединение контактов (ADR-CHATBALLS-0006, кадр K5): владелец видит,
 // что именно переедет, и обязан указать причину — она попадёт в журнал.
@@ -25,41 +26,41 @@ export function SalesClientMergeDialog({ client, open, saving, error, onClose, o
       onClose={onClose}
       tone="warning"
       icon="transfer"
-      title="Объединить контакты"
-      description="Идентичности и диалоги перейдут к контакту, который останется. Операция записывается в журнал действий и может быть разъединена обратно."
+      title={t("sales.merge_contacts")}
+      description={t("sales.identities_conversations_move_contact_stays")}
       className="sales-client-merge-dialog"
       width={620}
       actions={(
         <>
-          <Button variant="secondary" onClick={onClose}>Отмена</Button>
+          <Button variant="secondary" onClick={onClose}>{t("common.cancel")}</Button>
           <Button variant="primary" disabled={saving || reason.trim().length < 5} onClick={() => onMerge(reason)}>
-            {saving ? "Объединение" : "Объединить"}
+            {saving ? t("sales.merging") : t("sales.merge")}
           </Button>
         </>
       )}
     >
       <div className="sales-client-merge-compare">
         <div>
-          <small>Останется</small>
+          <small>{t("sales.stays")}</small>
           <strong>{client.name}</strong>
           <span>{client.cid}</span>
-          <span>{client.phone || "телефон не указан"}</span>
-          <span>{client.identities.length} идентичн. · {client.totalDialogs} диал.</span>
+          <span>{client.phone || t("sales.no_phone_number")}</span>
+          <span>{t("sales.identities_and_dialogs", { identities: client.identities.length, dialogs: client.totalDialogs })}</span>
         </div>
         <div className="is-source">
-          <small>Присоединяется</small>
+          <small>{t("sales.merged")}</small>
           <strong>{duplicate.name}</strong>
           <span>{duplicate.cid}</span>
-          <span>{duplicate.phone || "телефон не указан"}</span>
+          <span>{duplicate.phone || t("sales.no_phone_number")}</span>
           <span>{duplicate.sourceLabel}</span>
         </div>
       </div>
       <label className="sales-client-merge-reason">
-        <span>Причина объединения</span>
+        <span>{t("sales.reason_merging")}</span>
         <textarea
           rows={3}
           maxLength={2000}
-          placeholder="Например: один и тот же клиент, совпал подтверждённый телефон"
+          placeholder={t("sales.example_same_customer_confirmed_phone")}
           value={reason}
           onChange={(event) => setReason(event.target.value)}
         />
diff --git a/apps/internal-ui/src/features/sales/client-detail/SalesClientOverviewTab.tsx b/apps/internal-ui/src/features/sales/client-detail/SalesClientOverviewTab.tsx
index 429a7bd..67dd47f 100644
--- a/apps/internal-ui/src/features/sales/client-detail/SalesClientOverviewTab.tsx
+++ b/apps/internal-ui/src/features/sales/client-detail/SalesClientOverviewTab.tsx
@@ -3,6 +3,7 @@ import { Button } from "../../../shared/ui-controls";
 import { ContactAvatar } from "../../conversations/ContactAvatar";
 import { initialsOf } from "../clients/model";
 import type { ClientDetailVm } from "./model";
+import { t } from "../../../i18n";
 
 // Вкладка «Обзор» (кадр K3): слева сводка и активность, справа — текущий
 // диалог, ответственный и заметка (те же поля, что в контекст-панели чата).
@@ -27,7 +28,7 @@ export function SalesClientOverviewTab({ client, openConversation }: { client: C
         {current && (
           <section className="sales-client-section-card">
             <div className="sales-client-section-head">
-              <h3>Текущий диалог</h3>
+              <h3>{t("sales.current_conversation")}</h3>
               <span className="sales-client-mode" style={{ color: current.modeColor }}><i style={{ background: current.dot }} />{current.modeLabel}</span>
             </div>
             <p className="sales-client-current-title">«{current.title}»</p>
@@ -37,22 +38,22 @@ export function SalesClientOverviewTab({ client, openConversation }: { client: C
               {current.groupName && <><i /><span className="sales-client-group"><em style={{ background: current.groupColor }} />{current.groupName}</span></>}
               <i /><span>{current.time}</span>
             </p>
-            <Button className="sales-client-outline-action" variant="secondary" onClick={() => openConversation(current.id)}>Открыть диалог</Button>
+            <Button className="sales-client-outline-action" variant="secondary" onClick={() => openConversation(current.id)}>{t("sales.open_conversation")}</Button>
           </section>
         )}
         {current?.assignee && (
           <section className="sales-client-section-card">
-            <h3>Ответственный</h3>
+            <h3>{t("common.assignee")}</h3>
             <div className="sales-client-assignee">
               <ContactAvatar avatarUrl={current.assigneeAvatarUrl || undefined} initials={initialsOf(current.assignee)} background="var(--n-6)" className="sales-client-assignee-avatar" />
-              <span><strong>{current.assignee}</strong><small>по текущему диалогу</small></span>
+              <span><strong>{current.assignee}</strong><small>{t("sales.current_conversation_2")}</small></span>
             </div>
           </section>
         )}
         {noteDialog && (
           <section className="sales-client-note">
             <div>
-              <h3>Заметка</h3>
+              <h3>{t("conversations.note")}</h3>
               {(noteDialog.noteAuthor || noteDialog.noteAt) && <small>{[noteDialog.noteAuthor, noteDialog.noteAt].filter(Boolean).join(" · ")}</small>}
             </div>
             <p>{noteDialog.note}</p>
@@ -66,9 +67,9 @@ export function SalesClientOverviewTab({ client, openConversation }: { client: C
 function ActivityList({ activity }: { activity: ClientDetailVm["activity"] }) {
   return (
     <section className="sales-client-section-card">
-      <h3>Последняя активность</h3>
+      <h3>{t("sales.last_activity")}</h3>
       {activity.length === 0 ? (
-        <div className="sales-client-related-empty">Нет событий</div>
+        <div className="sales-client-related-empty">{t("sales.no_events")}</div>
       ) : (
         <div className="sales-client-timeline">
           {activity.map((item, index) => (
diff --git a/apps/internal-ui/src/features/sales/client-detail/model.ts b/apps/internal-ui/src/features/sales/client-detail/model.ts
index 741b8aa..ddf03d1 100644
--- a/apps/internal-ui/src/features/sales/client-detail/model.ts
+++ b/apps/internal-ui/src/features/sales/client-detail/model.ts
@@ -1,6 +1,7 @@
 import { agentColorOf, groupColorOf } from "../../conversations/model";
 import { shortDate, shortDateTime } from "../../../shared/utils";
 import { avatarColor, channelMap, contactTime, initialsOf, type ClientChannelCode } from "../clients/model";
+import { t } from "../../../i18n";
 
 // Карточка контакта (дизайн-базлайн v2, кадры K3–K5). Вкладка «Согласия»
 // убрана — журнал согласий отдельной сущностью не ведётся; блока «Связанные
@@ -9,14 +10,14 @@ import { avatarColor, channelMap, contactTime, initialsOf, type ClientChannelCod
 export type ClientDetailTab = "overview" | "dialogs" | "ids" | "audit";
 
 const PROVIDER_TO_CHANNEL: Record<string, ClientChannelCode> = { EMAIL: "EMAIL", MAX: "MAX", TELEGRAM: "TG", WEB: "WEB" };
-const PROVIDER_LABEL: Record<string, string> = { EMAIL: "Email", MAX: "MAX", TELEGRAM: "Telegram", WEB: "Web-виджет" };
+const PROVIDER_LABEL: Record<string, string> = { EMAIL: "Email", MAX: "MAX", TELEGRAM: "Telegram", WEB: t("common.web_widget") };
 
 // Подпись и цвет режима диалога — те же, что в чате и в списке контактов.
 const MODE_META: Record<ClientDialogMode, { label: string; color: string; bg: string; dot: string }> = {
-  ai: { label: "AI отвечает", color: "var(--ai)", bg: "color-mix(in srgb, var(--ai) 14%, var(--surface-card))", dot: "var(--ai)" },
-  wait: { label: "Ждёт", color: "var(--warning-text)", bg: "var(--warning-bg)", dot: "#faad14" },
-  operator: { label: "Ведёт человек", color: "var(--primary-text)", bg: "var(--primary-bg)", dot: "var(--primary)" },
-  closed: { label: "Закрыт", color: "var(--n-4)", bg: "var(--n-9)", dot: "var(--n-5)" },
+  ai: { label: t("conversations.ai_replying"), color: "var(--ai)", bg: "color-mix(in srgb, var(--ai) 14%, var(--surface-card))", dot: "var(--ai)" },
+  wait: { label: t("sales.waiting"), color: "var(--warning-text)", bg: "var(--warning-bg)", dot: "#faad14" },
+  operator: { label: t("sales.person_handling"), color: "var(--primary-text)", bg: "var(--primary-bg)", dot: "var(--primary)" },
+  closed: { label: t("sales.closed"), color: "var(--n-4)", bg: "var(--n-9)", dot: "var(--n-5)" },
 };
 
 export type ClientDialogMode = "ai" | "wait" | "operator" | "closed";
@@ -25,6 +26,9 @@ export type ApiClientDetail = {
   id: number;
   cid: string;
   name: string;
+  // Признак анонимного посетителя приходит от сервера, а не угадывается по
+  // подписи: на английском слова «Гость» в ней уже не будет.
+  isGuest?: boolean;
   avatarUrl?: string;
   description?: string;
   company?: string;
@@ -111,14 +115,14 @@ export type ClientDetailVm = {
 };
 
 export const clientDetailTabsOf = (client: ClientDetailVm): Array<{ key: ClientDetailTab; label: string; count?: number }> => [
-  { key: "overview", label: "Обзор" },
-  { key: "dialogs", label: "Диалоги", count: client.totalDialogs },
-  { key: "ids", label: "Идентификаторы", count: client.identities.length },
-  { key: "audit", label: "Аудит" },
+  { key: "overview", label: t("sales.overview") },
+  { key: "dialogs", label: t("common.conversations"), count: client.totalDialogs },
+  { key: "ids", label: t("sales.identities"), count: client.identities.length },
+  { key: "audit", label: t("common.audit") },
 ];
 
 export function toClientDetailVm(api: ApiClientDetail): ClientDetailVm {
-  const isGuest = /гость/i.test(api.name);
+  const isGuest = Boolean(api.isGuest);
   const duplicate = api.duplicate;
   return {
     id: api.id,
@@ -136,10 +140,10 @@ export function toClientDetailVm(api: ApiClientDetail): ClientDetailVm {
     channels: api.channels.map((code) => ({ code, ...channelMap[code] })),
     totalDialogs: api.totalDialogs,
     summary: [
-      { label: "Диалогов", value: String(api.totalDialogs) },
-      { label: "Открытых", value: String(api.openDialogs), accent: api.openDialogs > 0 },
-      { label: "Первый контакт", value: shortDate(api.firstContactAt), compact: true },
-      { label: "Последняя активность", value: contactTime(api.lastActivityAt), compact: true },
+      { label: t("sales.conversations"), value: String(api.totalDialogs) },
+      { label: t("sales.open"), value: String(api.openDialogs), accent: api.openDialogs > 0 },
+      { label: t("sales.first_contact"), value: shortDate(api.firstContactAt), compact: true },
+      { label: t("sales.last_activity"), value: contactTime(api.lastActivityAt), compact: true },
     ],
     dialogs: api.dialogs.map((dialog) => {
       const meta = MODE_META[dialog.mode];
@@ -174,8 +178,8 @@ export function toClientDetailVm(api: ApiClientDetail): ClientDetailVm {
         code,
         name: PROVIDER_LABEL[identity.provider] ?? identity.provider,
         value: [identity.externalUserId, identity.username ? `@${identity.username}` : ""].filter(Boolean).join(" · "),
-        since: `с ${shortDate(identity.createdAt)}`,
-        status: confirmed ? "Подтверждён телефоном" : "Не подтверждён",
+        since: t("sales.identity_since", { date: shortDate(identity.createdAt) }),
+        status: confirmed ? t("sales.confirmed_by_phone") : t("sales.not_confirmed"),
         confirmed,
         color: meta.color,
         bg: meta.bg,
@@ -199,7 +203,7 @@ export function toClientDetailVm(api: ApiClientDetail): ClientDetailVm {
         initials: initialsOf(duplicate.name),
         sourceLabel: [
           duplicate.sources.map((provider) => PROVIDER_LABEL[provider] ?? provider).join(", "),
-          `${duplicate.dialogs} диал.`,
+          t("sales.duplicate_dialogs", { count: duplicate.dialogs }),
           maskPhone(duplicate.phone),
         ].filter(Boolean).join(" · "),
       }
diff --git a/apps/internal-ui/src/features/sales/clients/SalesClientRow.tsx b/apps/internal-ui/src/features/sales/clients/SalesClientRow.tsx
index 59929d8..2fd2c62 100644
--- a/apps/internal-ui/src/features/sales/clients/SalesClientRow.tsx
+++ b/apps/internal-ui/src/features/sales/clients/SalesClientRow.tsx
@@ -4,12 +4,13 @@ import { ChannelGlyph } from "../../../shared/badges";
 import { Icon } from "../../../shared/icons";
 import { ContactAvatar } from "../../conversations/ContactAvatar";
 import type { SalesClientRowVm } from "./model";
+import { t } from "../../../i18n";
 
 // Строка контакта (кадр K1). Вся строка кликабельна — открывает карточку.
 export function SalesClientRow({ client, menu, openClient, setMenu }: { client: SalesClientRowVm; menu: string | null; openClient: (id: number) => void; setMenu: (menu: string | null) => void }) {
   const menuOpen = menu === client.cid;
   const menuItems = [
-    { key: "open", label: <button type="button" onClick={() => { setMenu(null); openClient(client.id); }}><Icon name="external" size={15} />Открыть карточку</button> },
+    { key: "open", label: <button type="button" onClick={() => { setMenu(null); openClient(client.id); }}><Icon name="external" size={15} />{t("admin.open_card")}</button> },
   ];
   return (
     <div className="sales-client-row" role="button" tabIndex={0} onClick={() => openClient(client.id)} onKeyDown={(event) => { if (event.key === "Enter") openClient(client.id); }}>
@@ -41,7 +42,7 @@ export function SalesClientRow({ client, menu, openClient, setMenu }: { client:
       <div className="sales-client-open" style={{ color: client.openColor }}>{client.openDialogs}</div>
       <div className="sales-client-menu" onClick={(event) => event.stopPropagation()}>
         <Dropdown menu={{ items: menuItems }} open={menuOpen} onOpenChange={(open) => setMenu(open ? client.cid : null)} trigger={["click"]} overlayClassName="app-dropdown is-wide">
-          <button className="row-menu-button" type="button" aria-label="Действия контакта"><Icon name="more" /></button>
+          <button className="row-menu-button" type="button" aria-label={t("sales.contact_actions")}><Icon name="more" /></button>
         </Dropdown>
       </div>
     </div>
diff --git a/apps/internal-ui/src/features/sales/clients/SalesClientsEmpty.tsx b/apps/internal-ui/src/features/sales/clients/SalesClientsEmpty.tsx
index 46a16e8..5d7ac54 100644
--- a/apps/internal-ui/src/features/sales/clients/SalesClientsEmpty.tsx
+++ b/apps/internal-ui/src/features/sales/clients/SalesClientsEmpty.tsx
@@ -1,4 +1,5 @@
 import { Icon } from "../../../shared/icons";
+import { t } from "../../../i18n";
 
 // Пустой список (кадр S1, §5.2): что это, зачем и что нажать.
 export function SalesClientsEmpty({ onOpenIntegrations }: { onOpenIntegrations: () => void }) {
@@ -6,10 +7,10 @@ export function SalesClientsEmpty({ onOpenIntegrations }: { onOpenIntegrations:
     <div className="sales-clients-blank">
       <span><Icon name="user" size={22} /></span>
       <div>
-        <strong>Контакты появятся, когда клиенты напишут вашему агенту</strong>
-        <p>Каждый, кто написал через Telegram, MAX, почту или виджет, становится контактом с историей диалогов.</p>
+        <strong>{t("sales.contacts_appear_once_customers_write")}</strong>
+        <p>{t("sales.everyone_who_writes_through_telegram")}</p>
       </div>
-      <button type="button" onClick={onOpenIntegrations}>Настроить подключения</button>
+      <button type="button" onClick={onOpenIntegrations}>{t("sales.set_up_connections")}</button>
     </div>
   );
 }
diff --git a/apps/internal-ui/src/features/sales/clients/SalesClientsFilters.tsx b/apps/internal-ui/src/features/sales/clients/SalesClientsFilters.tsx
index fc8b14f..d82e664 100644
--- a/apps/internal-ui/src/features/sales/clients/SalesClientsFilters.tsx
+++ b/apps/internal-ui/src/features/sales/clients/SalesClientsFilters.tsx
@@ -4,6 +4,7 @@ import { channelOptions } from "./model";
 /** Агент в фильтре: только то, что рисует выпадающий список. */
 export type AgentFilterOption = { id: number; name: string };
 import type { SalesClientsState } from "./useSalesClients";
+import { t } from "../../../i18n";
 
 // Фильтры списка (кадры K1/K2): поиск, «Все каналы», «Все агенты», чип
 // «С открытым диалогом»; «Сбросить» появляется только когда фильтр применён.
@@ -18,11 +19,11 @@ export function SalesClientsFilters({ clients, agents }: { clients: SalesClients
         value={clients.query}
         onChange={clients.setQuery}
         hotkey="/"
-        placeholder="Имя, email, телефон или логин…"
+        placeholder={t("sales.name_email_phone_or_username")}
       />
       <FilterDropdown
         icon="message"
-        label={clients.channelFilter.length ? "Каналы" : "Все каналы"}
+        label={clients.channelFilter.length ? t("common.channels") : t("sales.all_channels")}
         multiple
         open={clients.dropdown === "channels"}
         options={channelOptions.map((option) => ({ value: String(option.code), label: option.name, dot: option.color }))}
@@ -32,7 +33,7 @@ export function SalesClientsFilters({ clients, agents }: { clients: SalesClients
       />
       <FilterDropdown
         icon="robot"
-        label={clients.agentFilter.length ? "Агенты" : "Все агенты"}
+        label={clients.agentFilter.length ? t("common.agents") : t("sales.all_agents")}
         multiple
         open={clients.dropdown === "agents"}
         options={agents.map((agent) => ({ value: String(agent.id), label: agent.name }))}
@@ -41,10 +42,9 @@ export function SalesClientsFilters({ clients, agents }: { clients: SalesClients
         onSelect={(value) => clients.toggleAgent(Number(value))}
       />
       <button className={`sales-clients-chip ${clients.openOnly ? "active" : ""}`} type="button" onClick={clients.toggleOpenOnly}>
-        <i />С открытым диалогом
-      </button>
+        <i />{t("sales.with_open_conversation")}</button>
       <div className="sales-clients-filter-spacer" />
-      {clients.filtered && <button className="sales-clients-reset" type="button" onClick={clients.reset}>Сбросить</button>}
+      {clients.filtered && <button className="sales-clients-reset" type="button" onClick={clients.reset}>{t("common.reset")}</button>}
     </div>
   );
 }
diff --git a/apps/internal-ui/src/features/sales/clients/SalesClientsHeader.tsx b/apps/internal-ui/src/features/sales/clients/SalesClientsHeader.tsx
index a82bd16..26737a8 100644
--- a/apps/internal-ui/src/features/sales/clients/SalesClientsHeader.tsx
+++ b/apps/internal-ui/src/features/sales/clients/SalesClientsHeader.tsx
@@ -1,16 +1,16 @@
 import { Icon } from "../../../shared/icons";
+import { t } from "../../../i18n";
 
 // Шапка списка (кадр K1): «Контакты» и счётчик; при фильтре — «6 из 128».
 export function SalesClientsHeader({ shownCount, totalCount, filtered, onExport }: { shownCount: number; totalCount: number; filtered: boolean; onExport: () => void }) {
   return (
     <div className="sales-clients-header">
       <div>
-        <h2>Контакты</h2>
-        <span>{filtered ? `${shownCount} из ${totalCount}` : totalCount}</span>
+        <h2>{t("common.contacts")}</h2>
+        <span>{filtered ? t("common.n_of_m", { selected: shownCount, total: totalCount }) : totalCount}</span>
       </div>
       <button className="sales-clients-export" type="button" disabled={shownCount === 0} onClick={onExport}>
-        <Icon name="download" size={15} strokeWidth={2} />Экспорт CSV
-      </button>
+        <Icon name="download" size={15} strokeWidth={2} />{t("sales.export_csv")}</button>
     </div>
   );
 }
diff --git a/apps/internal-ui/src/features/sales/clients/SalesClientsTable.tsx b/apps/internal-ui/src/features/sales/clients/SalesClientsTable.tsx
index 7997247..c6d4142 100644
--- a/apps/internal-ui/src/features/sales/clients/SalesClientsTable.tsx
+++ b/apps/internal-ui/src/features/sales/clients/SalesClientsTable.tsx
@@ -2,6 +2,7 @@ import { Icon } from "../../../shared/icons";
 import { SalesClientRow } from "./SalesClientRow";
 import { Pagination } from "../../../shared/Pagination";
 import type { SalesClientsState } from "./useSalesClients";
+import { t } from "../../../i18n";
 
 // Таблица контактов (кадр K1): шапка · строки 60px · подвал со страницами.
 // Колонки: Контакт · Как связаться · Каналы · Последний диалог · Открытые · ⋯
@@ -9,19 +10,17 @@ import type { SalesClientsState } from "./useSalesClients";
 export function SalesClientsTable({ clients, openClient }: { clients: SalesClientsState; openClient: (id: number) => void }) {
   const from = (clients.page - 1) * clients.pageSize + 1;
   const to = from + clients.rows.length - 1;
-  const shown = clients.total === 0 ? "Ничего не найдено" : `${from}–${to} из ${clients.total}`;
+  const shown = clients.total === 0 ? t("common.nothing_found") : t("common.range_of", { from, to, total: clients.total });
   return (
     <div className="sales-clients-card">
       <div className="sales-clients-head">
-        <span>Контакт</span>
-        <span>Как связаться</span>
-        <span>Каналы</span>
-        <button className={clients.sortKey === "last" ? "is-active" : ""} type="button" onClick={() => clients.sortBy("last")}>
-          Последний диалог
-          <i className={`sales-clients-sort ${clients.sortKey === "last" && clients.sortDir === "desc" ? "is-up" : ""}`}><Icon name="arrowDown" size={11} strokeWidth={2.5} /></i>
+        <span>{t("common.contact")}</span>
+        <span>{t("sales.how_reach_them")}</span>
+        <span>{t("common.channels")}</span>
+        <button className={clients.sortKey === "last" ? "is-active" : ""} type="button" onClick={() => clients.sortBy("last")}>{t("sales.last_conversation")}<i className={`sales-clients-sort ${clients.sortKey === "last" && clients.sortDir === "desc" ? "is-up" : ""}`}><Icon name="arrowDown" size={11} strokeWidth={2.5} /></i>
         </button>
         <button className={`is-numeric ${clients.sortKey === "open" ? "is-active" : ""}`} type="button" onClick={() => clients.sortBy("open")}>
-          Открытые
+          {t("sales.open_column")}
           {clients.sortKey === "open" && <i className={`sales-clients-sort ${clients.sortDir === "desc" ? "is-up" : ""}`}><Icon name="arrowDown" size={11} strokeWidth={2.5} /></i>}
         </button>
         <span />
@@ -32,8 +31,8 @@ export function SalesClientsTable({ clients, openClient }: { clients: SalesClien
       {clients.rows.length === 0 && (
         <div className="sales-clients-empty">
           <Icon name="search" size={20} />
-          <strong>Контакты не найдены</strong>
-          <span>Измените условия фильтра или сбросьте их.</span>
+          <strong>{t("sales.no_contacts_found")}</strong>
+          <span>{t("sales.change_filter_conditions_or_clear")}</span>
         </div>
       )}
       <Pagination
diff --git a/apps/internal-ui/src/features/sales/clients/exportClientsCsv.ts b/apps/internal-ui/src/features/sales/clients/exportClientsCsv.ts
index 215dc93..0464dad 100644
--- a/apps/internal-ui/src/features/sales/clients/exportClientsCsv.ts
+++ b/apps/internal-ui/src/features/sales/clients/exportClientsCsv.ts
@@ -1,14 +1,15 @@
 import type { SalesClientRowVm } from "./model";
+import { t } from "../../../i18n";
 
 const HEADERS = [
-  "Контакт",
-  "Телефон",
+  t("common.contact"),
+  t("common.phone"),
   "Email",
-  "Логин",
-  "Каналы",
-  "Последний диалог",
-  "Когда",
-  "Открытые диалоги",
+  t("sales.username"),
+  t("common.channels"),
+  t("sales.last_conversation"),
+  t("sales.when"),
+  t("sales.open_conversations"),
 ];
 
 function csvCell(value: string | number): string {
diff --git a/apps/internal-ui/src/features/sales/clients/model.ts b/apps/internal-ui/src/features/sales/clients/model.ts
index dc9b38b..4bd8115 100644
--- a/apps/internal-ui/src/features/sales/clients/model.ts
+++ b/apps/internal-ui/src/features/sales/clients/model.ts
@@ -5,6 +5,7 @@
 import { waitLabelOf } from "../../conversations/model";
 import { channelMap } from "../../../shared/providers";
 import { shortDate } from "../../../shared/utils";
+import { t } from "../../../i18n";
 
 export { channelMap };
 
@@ -48,7 +49,7 @@ export const channelOptions: Array<{ code: ClientChannelCode; name: string; colo
   { code: "EMAIL", name: "Email", color: channelMap.EMAIL.color },
   { code: "MAX", name: "MAX", color: channelMap.MAX.color },
   { code: "TG", name: "Telegram", color: channelMap.TG.color },
-  { code: "WEB", name: "Web-виджет", color: channelMap.WEB.color },
+  { code: "WEB", name: t("common.web_widget"), color: channelMap.WEB.color },
 ];
 
 
@@ -65,6 +66,9 @@ export type ApiClient = {
   avatarUrl?: string;
   cid: string;
   name: string;
+  // Признак анонимного посетителя приходит от сервера. Раньше он выводился
+  // регуляркой по слову «Гость» в подписи — на английском не сработало бы.
+  isGuest?: boolean;
   phone: string;
   email: string;
   username: string;
@@ -95,10 +99,10 @@ export function avatarColor(seed: string): string {
 
 export function relativeTime(iso: string): { minutes: number; label: string } {
   const minutes = Math.max(0, Math.round((Date.now() - new Date(iso).getTime()) / 60000));
-  if (minutes < 60) return { minutes, label: `${minutes} мин назад` };
+  if (minutes < 60) return { minutes, label: t("time.minutes_ago", { count: minutes }) };
   const hours = Math.floor(minutes / 60);
-  if (hours < 24) return { minutes, label: `${hours} ч назад` };
-  return { minutes, label: `${Math.floor(hours / 24)} д назад` };
+  if (hours < 24) return { minutes, label: t("time.hours_ago", { count: hours }) };
+  return { minutes, label: t("time.days_ago_short", { count: Math.floor(hours / 24) }) };
 }
 
 // «17:10 · сегодня» · «вчера, 18:02» · «3 сен» (кадр K1).
@@ -107,8 +111,8 @@ export function contactTime(iso: string, now = new Date()): string {
   if (Number.isNaN(date.getTime())) return "";
   const time = date.toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" });
   const days = Math.round((startOfDay(now).getTime() - startOfDay(date).getTime()) / 86400000);
-  if (days === 0) return `${time} · сегодня`;
-  if (days === 1) return `вчера, ${time}`;
+  if (days === 0) return t("time.today_at", { time });
+  if (days === 1) return t("time.yesterday_comma", { time });
   return shortDate(date);
 }
 
@@ -120,13 +124,13 @@ function startOfDay(date: Date): Date {
 // таймером, сотрудник по имени, закрытый — кем закрыт.
 export function lastDialogWho(client: SalesClient): string {
   if (client.mode === "ai") return `AI · ${client.lastAgentName}`;
-  if (client.mode === "wait") return `Ждёт человека · ${waitLabelOf(client.lastAt)}`;
-  if (client.mode === "operator") return client.lastAssignee || "Ведёт сотрудник";
-  return `Закрыт · ${client.lastAssignee || "AI"}`;
+  if (client.mode === "wait") return t("conversations.waiting_for_person_since", { waited: waitLabelOf(client.lastAt) });
+  if (client.mode === "operator") return client.lastAssignee || t("sales.operator_handling");
+  return t("conversations.closed_by", { name: client.lastAssignee || "AI" });
 }
 
 export function toSalesClient(api: ApiClient): SalesClient {
-  const isGuest = /гость/i.test(api.name);
+  const isGuest = Boolean(api.isGuest);
   const { minutes } = relativeTime(api.lastActivityAt);
   return {
     id: api.id,
@@ -159,7 +163,7 @@ export function toSalesClientRow(client: SalesClient): SalesClientRowVm {
     : client.username
       ? `@${client.username}`
       : client.anon
-        ? "анонимная сессия виджета"
+        ? t("sales.anonymous_widget_session")
         : "";
   return {
     ...client,
diff --git a/apps/internal-ui/src/features/sales/clients/useSalesClients.ts b/apps/internal-ui/src/features/sales/clients/useSalesClients.ts
index fc1b375..91ff0f6 100644
--- a/apps/internal-ui/src/features/sales/clients/useSalesClients.ts
+++ b/apps/internal-ui/src/features/sales/clients/useSalesClients.ts
@@ -5,6 +5,7 @@ import { usePagedResource } from "../../../shared/usePagedResource";
 import { fetchClients, type ClientsQuery } from "./api";
 import type { ClientChannelCode, ClientDropdown, ClientSortKey } from "./model";
 import { toSalesClient, toSalesClientRow } from "./model";
+import { t } from "../../../i18n";
 
 export type SalesClientsState = ReturnType<typeof useSalesClients>;
 
@@ -28,7 +29,7 @@ export function useSalesClients() {
     [agentFilter, channelFilter, openOnly, settledQuery, sortDir, sortKey],
   );
   const load = useCallback((page: number) => fetchClients(request, page), [request]);
-  const page = usePagedResource(load, request, "Не удалось загрузить контакты");
+  const page = usePagedResource(load, request, t("sales.could_not_load_contacts"));
   const rows = useMemo(
     () => page.items.map((item) => toSalesClientRow(toSalesClient(item))),
     [page.items],
diff --git a/apps/internal-ui/src/features/sales/dialogs/context/ClientContext.tsx b/apps/internal-ui/src/features/sales/dialogs/context/ClientContext.tsx
index 322242a..c3355fa 100644
--- a/apps/internal-ui/src/features/sales/dialogs/context/ClientContext.tsx
+++ b/apps/internal-ui/src/features/sales/dialogs/context/ClientContext.tsx
@@ -9,6 +9,7 @@ import { DialogControls } from "../../../conversations/DialogControls";
 import { requestContact, updateContactCard, type ApiConversation } from "../../../conversations/model";
 import type { ConversationListItem } from "../../../conversations/types";
 import type { EmployeeGroupRef } from "../../../../types";
+import { t } from "../../../../i18n";
 
 // Карточка контакта (дизайн-базлайн v2, решение 5): аватар 64 · канал · имя ·
 // описание · поля с иконками и «копировать» · «Позвонить» / «Видеозвонок» под
@@ -43,7 +44,7 @@ export function ClientContext({
   }, [detail?.id]);
 
   if (!dialog) {
-    return <div className="sales-client-context"><p className="sales-context-muted">Выберите диалог</p></div>;
+    return <div className="sales-client-context"><p className="sales-context-muted">{t("conversations.pick_conversation")}</p></div>;
   }
   const channel = providerMeta[dialog.channel];
   const contact = detail?.contact ?? null;
@@ -74,11 +75,11 @@ export function ClientContext({
   if (phone) fields.push({ key: "phone", icon: "phone", text: phone, copy: phone });
   if (dialog.channel === "EMAIL" && email) fields.push({ key: "email", icon: "mail", text: email, copy: email });
   if (username) fields.push({ key: "username", icon: "send", text: `@${username} · ${channel.label}`, copy: `@${username}` });
-  if (isGuest) fields.push({ key: "guest", icon: "message", text: `${channel.label} · ${detail?.connection?.name ?? "виджет"}, анонимная сессия`, muted: true });
+  if (isGuest) fields.push({ key: "guest", icon: "message", text: t("sales.anonymous_session", { channel: channel.label, connection: detail?.connection?.name ?? t("sales.widget") }), muted: true });
   if (fields.length === 0 && detail?.connection) fields.push({ key: "connection", icon: "plug", text: `${channel.label} · ${detail.connection.name}`, muted: true });
   // Компания и город — из карточки контакта (решение 5), без «копировать».
   if (contact?.company) fields.push({ key: "company", icon: "building", text: contact.company });
-  if (contact?.city) fields.push({ key: "city", icon: "pin", text: `${contact.city}, Россия` });
+  if (contact?.city) fields.push({ key: "city", icon: "pin", text: t("sales.city_country", { city: contact.city, country: t("sales.country_russia") }) });
   const canEdit = Boolean(detail && contact && applyConversation);
 
   return (
@@ -98,9 +99,9 @@ export function ClientContext({
           <>
             <div className="ctx-contact-name">
               <strong>{dialog.name}</strong>
-              {canEdit && <button className="ctx-edit-contact" type="button" title="Редактировать контакт" aria-label="Редактировать контакт" onClick={() => setEditing(true)}><Icon name="edit" size={14} /></button>}
+              {canEdit && <button className="ctx-edit-contact" type="button" title={t("sales.edit_contact")} aria-label={t("sales.edit_contact")} onClick={() => setEditing(true)}><Icon name="edit" size={14} /></button>}
             </div>
-            <p className={`ctx-contact-description ${contact?.description ? "" : "is-empty"}`}>{contact?.description || "Описания нет"}</p>
+            <p className={`ctx-contact-description ${contact?.description ? "" : "is-empty"}`}>{contact?.description || t("sales.no_description")}</p>
           </>
         )}
         <div className="ctx-contact-fields">
@@ -114,16 +115,16 @@ export function ClientContext({
         </div>
         {startCall && (
           <div className="ctx-call-buttons">
-            {detail?.connection?.audioCalls && <button type="button" onClick={() => startCall("AUDIO")}><Icon name="phone" size={15} />Позвонить</button>}
-            {detail?.connection?.videoCalls && <button type="button" onClick={() => startCall("VIDEO")}><Icon name="video" size={15} />Видеозвонок</button>}
+            {detail?.connection?.audioCalls && <button type="button" onClick={() => startCall("AUDIO")}><Icon name="phone" size={15} />{t("sales.call")}</button>}
+            {detail?.connection?.videoCalls && <button type="button" onClick={() => startCall("VIDEO")}><Icon name="video" size={15} />{t("sales.video_call")}</button>}
           </div>
         )}
         {contact && !phone && (
           <>
             <button className="ctx-request-contact" type="button" onClick={() => void onRequestContact()} disabled={!canRequest || requesting || alreadyRequested}>
-              {requesting ? "Отправка…" : alreadyRequested ? "Контакт запрошен" : "Запросить контакт"}
+              {requesting ? t("common.sending") : alreadyRequested ? t("sales.contact_details_requested") : t("sales.request_contact_details")}
             </button>
-            {requestError && <p className="ctx-error">Не удалось отправить запрос — попробуйте ещё раз</p>}
+            {requestError && <p className="ctx-error">{t("sales.could_not_send_request_try")}</p>}
           </>
         )}
       </div>
diff --git a/apps/internal-ui/src/features/sales/dialogs/context/HistoryContext.tsx b/apps/internal-ui/src/features/sales/dialogs/context/HistoryContext.tsx
index fbaf50d..f782bf8 100644
--- a/apps/internal-ui/src/features/sales/dialogs/context/HistoryContext.tsx
+++ b/apps/internal-ui/src/features/sales/dialogs/context/HistoryContext.tsx
@@ -1,22 +1,12 @@
 import type { ApiConversation } from "../../../conversations/model";
 import { providerKey, providerLabel, providerMeta } from "../../../../shared/providers";
+import { t, tn } from "../../../../i18n";
+import { shortDate } from "../../../../shared/utils";
 
 // Вкладка «История» (дизайн-базлайн v2, кадр F): диалоги контакта карточками,
 // текущий выделен акцентом; в каждой — канал-плашка, агент · статус, превью.
 
-const LIFECYCLE: Record<string, string> = { OPEN: "открыт", CLOSED: "закрыт", SPAM: "спам" };
-
-function fmtDate(value: string): string {
-  return new Date(value).toLocaleDateString("ru-RU", { day: "numeric", month: "short" }).replace(".", "");
-}
-
-function pluralDialogs(count: number): string {
-  const mod10 = count % 10;
-  const mod100 = count % 100;
-  if (mod10 === 1 && mod100 !== 11) return `${count} диалог`;
-  if (mod10 >= 2 && mod10 <= 4 && (mod100 < 10 || mod100 >= 20)) return `${count} диалога`;
-  return `${count} диалогов`;
-}
+const LIFECYCLE: Record<string, string> = { OPEN: t("sales.open_2"), CLOSED: t("sales.closed_2"), SPAM: t("sales.spam") };
 
 function ChannelPill({ provider }: { provider: string | null }) {
   const key = provider ? providerKey(provider) : null;
@@ -35,27 +25,27 @@ export function HistoryContext({ detail }: { detail: ApiConversation | null }) {
   return (
     <div className="sales-history-context">
       <div className="history-head">
-        <h4>Диалоги контакта</h4>
-        <span>{pluralDialogs(total)}</span>
+        <h4>{t("sales.contact_conversations")}</h4>
+        <span>{tn("plural.conversations", total)}</span>
       </div>
       {detail && (
         <div className="history-card is-current">
-          <div className="history-card-title"><strong>Текущий диалог</strong><span className="is-open">{LIFECYCLE[detail.lifecycle] ?? detail.lifecycle}</span></div>
+          <div className="history-card-title"><strong>{t("sales.current_conversation")}</strong><span className="is-open">{LIFECYCLE[detail.lifecycle] ?? detail.lifecycle}</span></div>
           <div className="history-card-meta">
             <ChannelPill provider={detail.connection?.provider ?? null} />
-            <span>{detail.channel.name} · {detail.group ? detail.group.name : "без группы"}</span>
+            <span>{detail.channel.name} · {detail.group ? detail.group.name : t("sales.no_group")}</span>
           </div>
           {detail.lastMessage?.text && <p>{detail.lastMessage.text.replace(/\s+/g, " ").slice(0, 120)}</p>}
         </div>
       )}
-      {history.length === 0 && <p className="sales-context-muted">Других диалогов с этим контактом нет</p>}
+      {history.length === 0 && <p className="sales-context-muted">{t("sales.there_no_other_conversations_with")}</p>}
       {history.map((item, index) => (
         <div className="history-card" key={item.id}>
           {/* Кадр F: тема — первая реплика клиента, последнее — «Первое обращение»; мета: агент · статус · кто вёл. */}
-          <div className="history-card-title"><strong>{index === history.length - 1 ? "Первое обращение" : (item.topic || item.channelName)}</strong><span>{fmtDate(item.lastActivityAt)}</span></div>
+          <div className="history-card-title"><strong>{index === history.length - 1 ? t("sales.first_enquiry") : (item.topic || item.channelName)}</strong><span>{shortDate(item.lastActivityAt)}</span></div>
           <div className="history-card-meta">
             <ChannelPill provider={item.provider} />
-            <span>{item.channelName} · {LIFECYCLE[item.lifecycle] ?? item.lifecycle} · {item.handledBy ? `${handledVerb(item.handledBy)} ${item.handledBy}` : "AI"}{item.provider && !providerKey(item.provider) ? ` · ${providerLabel(item.provider)}` : ""}</span>
+            <span>{item.channelName} · {LIFECYCLE[item.lifecycle] ?? item.lifecycle} · {item.handledBy ? `${t(handledVerbKey(item.handledBy), { name: item.handledBy })}` : "AI"}{item.provider && !providerKey(item.provider) ? ` · ${providerLabel(item.provider)}` : ""}</span>
           </div>
           {item.preview && <p>{item.preview}</p>}
         </div>
@@ -64,8 +54,13 @@ export function HistoryContext({ detail }: { detail: ApiConversation | null }) {
   );
 }
 
-// «вела Анна Ким» / «вёл Игорь Савельев» — по окончанию имени (женские имена на -а/-я).
-function handledVerb(name: string): string {
+// «вела Анна Ким» / «вёл Игорь Савельев» — по окончанию имени (женские имена
+// на -а/-я). Правило остаётся русским: в английском обе формы дают одно и то
+// же «handled by», и убирать согласование ради этого значило бы испортить
+// русский интерфейс ради языка, которому оно безразлично.
+function handledVerbKey(name: string): "sales.handled_by_f" | "sales.handled_by_m" {
   const first = name.trim().split(/\s+/)[0] ?? "";
-  return /[ая]$/i.test(first) && !/^(Никита|Илья|Кузьма|Савва|Лука|Фома)$/i.test(first) ? "вела" : "вёл";
+  return /[ая]$/i.test(first) && !/^(Никита|Илья|Кузьма|Савва|Лука|Фома)$/i.test(first)
+    ? "sales.handled_by_f"
+    : "sales.handled_by_m";
 }
diff --git a/apps/internal-ui/src/features/settings/CallsRelayCard.tsx b/apps/internal-ui/src/features/settings/CallsRelayCard.tsx
index bea104e..f5f9031 100644
--- a/apps/internal-ui/src/features/settings/CallsRelayCard.tsx
+++ b/apps/internal-ui/src/features/settings/CallsRelayCard.tsx
@@ -4,6 +4,7 @@ import { FormField, TextAreaField } from "../../shared/form-controls";
 import { Button } from "../../shared/ui-controls";
 import { shortDateTime } from "../../shared/utils";
 import { instanceError, loadInstance, patchInstance, type InstancePayload } from "./instance";
+import { t } from "../../i18n";
 
 // Relay для звонков (раздел «Голосовые и звонки»): TURN нужен, только когда
 // прямое ICE-соединение не проходит — сети со строгим NAT. Настройка живёт
@@ -27,7 +28,7 @@ export function CallsRelayCard({ canManage }: { canManage: boolean }) {
   }
 
   useEffect(() => {
-    loadInstance().then(apply).catch(() => setErrorText("Не удалось загрузить настройки relay"));
+    loadInstance().then(apply).catch(() => setErrorText(t("settings.could_not_load_relay_settings")));
   }, []);
 
   if (!current) return null;
@@ -47,7 +48,7 @@ export function CallsRelayCard({ canManage }: { canManage: boolean }) {
         },
       });
       apply(payload);
-      setMessage("Сохранено. Звонки будут использовать эти адреса relay.");
+      setMessage(t("settings.saved_calls_will_use_these"));
     } catch (error) {
       const { detail, errors } = instanceError(error);
       setErrorText(detail);
@@ -66,27 +67,26 @@ export function CallsRelayCard({ canManage }: { canManage: boolean }) {
     <form className="administration-card" onSubmit={submit}>
       <div className="settings-card-head">
         <div>
-          <strong>TURN для звонков</strong>
-          <small>Relay на случай, когда прямое соединение не проходит</small>
+          <strong>{t("settings.turn_calls")}</strong>
+          <small>{t("settings.relay_when_direct_connection_does")}</small>
         </div>
       </div>
       <p className="settings-section-note">
-        Нужен, только если звонки идут через сети со строгим NAT. Общий секрет с сервером
-        relay {current.turn.secretReady
-          ? "уже создан установкой — вводить его не нужно."
-          : "будет создан при следующем запуске стека."}
+        {t("settings.turn_note_prefix")} {current.turn.secretReady
+          ? t("settings.was_already_created_by_installation")
+          : t("settings.will_created_next_time_stack")}
       </p>
       <div className="administration-fields">
         <TextAreaField
           disabled={!canManage}
-          label="Адреса TURN — по одному в строке"
+          label={t("settings.turn_addresses_one_per_line")}
           value={urls}
           onChange={(value) => { setUrls(value); touch(); }}
         />
         <FormField
           disabled={!canManage}
           error={fieldErrors.turnTtlSeconds}
-          label="Время жизни доступа, секунд"
+          label={t("settings.access_lifetime_seconds")}
           mono
           value={ttl}
           onChange={(value) => { setTtl(value); touch(); }}
@@ -97,10 +97,10 @@ export function CallsRelayCard({ canManage }: { canManage: boolean }) {
       {canManage && (
         <div className="administration-actions">
           <small className="administration-saved">
-            {current.updatedAt ? `Сохранено ${shortDateTime(current.updatedAt)}` : "Ещё не сохранялось"}
+            {current.updatedAt ? t("time.saved_at", { time: shortDateTime(current.updatedAt) }) : t("common.never_saved_yet")}
           </small>
           <Button type="submit" variant="primary" disabled={busy}>
-            {busy ? "Сохранение" : "Сохранить"}
+            {busy ? t("common.saving") : t("common.save")}
           </Button>
         </div>
       )}
diff --git a/apps/internal-ui/src/features/settings/CommunicationSettingsCard.tsx b/apps/internal-ui/src/features/settings/CommunicationSettingsCard.tsx
index 75d3f62..996d6ea 100644
--- a/apps/internal-ui/src/features/settings/CommunicationSettingsCard.tsx
+++ b/apps/internal-ui/src/features/settings/CommunicationSettingsCard.tsx
@@ -4,6 +4,7 @@ import { api } from "../../api/client";
 import { ChannelGlyph } from "../../shared/badges";
 import { SwitchButton } from "../../shared/form-controls";
 import { CallsRelayCard } from "./CallsRelayCard";
+import { t } from "../../i18n";
 
 // «Голосовые и звонки» (Настройки): матрица точек входа × функции. Что
 // разрешено клиенту и сотруднику в диалогах через каждую интеграцию —
@@ -26,7 +27,7 @@ type EntryPoint = {
 type Flag = "voiceMessages" | "audioCalls" | "videoCalls";
 
 const BASE = "/api/v1/company/administration/communication/";
-const COLUMNS: Array<[Flag, string]> = [["voiceMessages", "Голосовые"], ["audioCalls", "Аудиозвонки"], ["videoCalls", "Видеозвонки"]];
+const COLUMNS: Array<[Flag, string]> = [["voiceMessages", t("settings.voice_messages")], ["audioCalls", t("settings.audio_calls")], ["videoCalls", t("settings.video_calls")]];
 
 export function CommunicationSettingsCard({ canManage }: { canManage: boolean }) {
   const [items, setItems] = useState<EntryPoint[] | null>(null);
@@ -34,7 +35,7 @@ export function CommunicationSettingsCard({ canManage }: { canManage: boolean })
   const [errorText, setErrorText] = useState("");
 
   useEffect(() => {
-    api<{ items: EntryPoint[] }>(BASE).then((payload) => setItems(payload.items)).catch(() => setErrorText("Не удалось загрузить точки входа"));
+    api<{ items: EntryPoint[] }>(BASE).then((payload) => setItems(payload.items)).catch(() => setErrorText(t("settings.could_not_load_entry_points")));
   }, []);
 
   if (!items) return null;
@@ -47,7 +48,7 @@ export function CommunicationSettingsCard({ canManage }: { canManage: boolean })
       const payload = await api<{ items: EntryPoint[] }>(BASE, { method: "PATCH", body: JSON.stringify({ items: [{ id: item.id, [flag]: !item[flag] }] }) });
       setItems(payload.items);
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось сохранить");
+      setErrorText(error instanceof Error ? error.message : t("common.could_not_save"));
     } finally {
       setBusyId(null);
     }
@@ -55,11 +56,11 @@ export function CommunicationSettingsCard({ canManage }: { canManage: boolean })
 
   return (
     <>
-      {items.length === 0 && <p className="settings-section-note">Точек входа пока нет — подключите бота, почту или Web-виджет в «Интеграциях».</p>}
+      {items.length === 0 && <p className="settings-section-note">{t("settings.there_no_entry_points_yet")}</p>}
       {items.length > 0 && (
         <div className="table-card communication-matrix">
           <div className="communication-row is-head">
-            <span>Точка входа</span>
+            <span>{t("settings.entry_point")}</span>
             {COLUMNS.map(([flag, label]) => <span key={flag}>{label}</span>)}
           </div>
           {items.map((item) => (
@@ -67,13 +68,13 @@ export function CommunicationSettingsCard({ canManage }: { canManage: boolean })
               <span className="communication-entry">
                 <ChannelGlyph provider={item.provider} size={16} />
                 <strong>{item.name}</strong>
-                <small>{item.agentName || "без агента"}{item.isActive ? "" : " · выключена"}</small>
+                <small>{item.agentName || t("settings.no_agent")}{item.isActive ? "" : t("settings.entry_point_off")}</small>
               </span>
               {COLUMNS.map(([flag, label]) => (
                 <span key={flag}>
                   {flag === "voiceMessages" || item.supportsCalls
                     ? <SwitchButton checked={item[flag]} className="ui-switch is-compact" label={`${label}: ${item.name}`} disabled={!canManage || busyId != null} onClick={() => void toggle(item, flag)} />
-                    : <small className="communication-na">недоступно</small>}
+                    : <small className="communication-na">{t("settings.unavailable")}</small>}
                 </span>
               ))}
             </div>
@@ -82,7 +83,7 @@ export function CommunicationSettingsCard({ canManage }: { canManage: boolean })
       )}
       {errorText && <div className="settings-section-error">{errorText}</div>}
       {items.length > 0 && (
-        <p className="settings-section-note">Голосовые, присланные клиентом из мессенджера, принимаются всегда. Почта звонки не поддерживает. Изменения применяются сразу.</p>
+        <p className="settings-section-note">{t("settings.voice_messages_sent_by_customer")}</p>
       )}
       <CallsRelayCard canManage={canManage} />
     </>
diff --git a/apps/internal-ui/src/features/settings/DemoDataCard.tsx b/apps/internal-ui/src/features/settings/DemoDataCard.tsx
index 6d8d71d..48c9113 100644
--- a/apps/internal-ui/src/features/settings/DemoDataCard.tsx
+++ b/apps/internal-ui/src/features/settings/DemoDataCard.tsx
@@ -4,6 +4,7 @@ import { useCallback, useEffect, useState } from "react";
 import { api } from "../../api/client";
 import { Button } from "../../shared/ui-controls";
 import { shortDate } from "../../shared/utils";
+import { fmt, t } from "../../i18n";
 
 // Секция «Демо-данные» экрана настроек: владелец или админ ставит и удаляет
 // вымышленную организацию «Ателье Норд» одной кнопкой. Работу выполняет
@@ -36,15 +37,15 @@ const POLL_INTERVAL_MS = 2000;
 export function demoStatusLabel(state: DemoState): string {
   switch (state.status) {
     case "INSTALLED":
-      return "Установлены";
+      return t("settings.installed");
     case "INSTALLING":
-      return "Устанавливаются";
+      return t("settings.installing");
     case "REMOVING":
-      return "Удаляются";
+      return t("settings.removing");
     case "FAILED":
-      return "Ошибка установки";
+      return t("settings.installation_failed");
     default:
-      return "Не установлены";
+      return t("settings.not_installed");
   }
 }
 
@@ -58,7 +59,7 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
     try {
       setState(await api<DemoState>("/api/v1/company/demo/"));
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось получить статус демо-данных");
+      setError(caught instanceof Error ? caught.message : t("settings.could_not_read_demo_data"));
     }
   }, []);
 
@@ -89,7 +90,7 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
     try {
       setState(await api<DemoState>("/api/v1/company/demo/", { method: "POST" }));
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось запустить установку");
+      setError(caught instanceof Error ? caught.message : t("settings.could_not_start_installation"));
     } finally {
       setSubmitting(false);
     }
@@ -102,7 +103,7 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
       setState(await api<DemoState>("/api/v1/company/demo/", { method: "DELETE" }));
       setConfirmRemove(false);
     } catch (caught) {
-      setError(caught instanceof Error ? caught.message : "Не удалось запустить удаление");
+      setError(caught instanceof Error ? caught.message : t("settings.could_not_start_removal"));
     } finally {
       setSubmitting(false);
     }
@@ -115,11 +116,11 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
     <div className="administration-card">
       <div className="settings-demo-head">
         <div className="settings-demo-title">
-        <strong>Ателье «Норд»</strong>
+        <strong>{t("settings.nord_atelier")}</strong>
         {label && <b className={`settings-demo-status is-${state?.status.toLowerCase()}`}>{label}</b>}
         {installed && state && (
           <small>
-            {state.recordsCount.toLocaleString("ru-RU")} записей
+            {t("settings.demo_records_count", { count: fmt.number(state.recordsCount) })}
             {state.finishedAt ? ` · ${shortDate(state.finishedAt)}` : ""}
           </small>
         )}
@@ -127,23 +128,22 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
         <div className="settings-demo-actions">
           {!installed && (
             <Button variant="primary" disabled={busy || submitting || state === null} onClick={() => void install()}>
-              {state?.status === "INSTALLING" ? "Устанавливаются…" : state?.status === "FAILED" ? "Повторить установку" : "Установить"}
+              {state?.status === "INSTALLING" ? t("settings.installing_2") : state?.status === "FAILED" ? t("settings.install_again") : t("settings.install")}
             </Button>
           )}
           {(installed || state?.status === "REMOVING") && (
             <Button variant="danger-outline" disabled={busy || submitting} onClick={() => setConfirmRemove(true)}>
-              {state?.status === "REMOVING" ? "Удаляются…" : "Удалить демо-данные"}
+              {state?.status === "REMOVING" ? t("settings.removing_2") : t("settings.remove_demo_data")}
             </Button>
           )}
         </div>
       </div>
       <p className="settings-section-note">
-        Сотрудники и группы, агенты с подключениями, знания, диалоги во всех состояниях, голосовые, шаблоны ответов,
-        портал поддержки, звонки и уведомления. Удаляются целиком — ваши данные не затрагиваются.
+        {t("settings.demo_contents")}
       </p>
       {state?.status === "INSTALLED" && (
         <div className="settings-demo-logins">
-          <small>Войдите под демо-сотрудником в приватном окне, чтобы увидеть систему его глазами:</small>
+          <small>{t("settings.sign_as_demo_operator_private")}</small>
           <div className="settings-demo-accounts">
             {state.accounts.map((account) => (
               <div className="settings-demo-account" key={account.email}>
@@ -153,7 +153,7 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
                     : <span className="settings-demo-avatar">{account.fullName.trim().slice(0, 1).toUpperCase()}</span>}
                   <span>
                     <strong>{account.fullName}</strong>
-                    <small>{account.role === "EMPLOYEE" ? "Сотрудник" : "Администратор"} · {account.groups.length ? account.groups.join(", ") : "без групп"}</small>
+                    <small>{account.role === "EMPLOYEE" ? t("common.operator") : t("common.administrator")} · {account.groups.length ? account.groups.join(", ") : t("settings.no_groups")}</small>
                   </span>
                 </div>
                 <code>{account.email}</code>
@@ -166,13 +166,13 @@ export function DemoDataCard({ reload }: { reload: () => void }) {
       {state?.status === "FAILED" && state.error && <div className="settings-section-error">{state.error}</div>}
       {error && <div className="settings-section-error">{error}</div>}
       {confirmRemove && (
-        <Modal open title="Удалить демо-данные?" onCancel={() => setConfirmRemove(false)} footer={null} destroyOnClose>
+        <Modal open title={t("settings.remove_demo_data_2")} onCancel={() => setConfirmRemove(false)} footer={null} destroyOnClose>
           <div className="integration-form">
-            <p>Будут удалены все записи демо-набора: сотрудники, агенты, диалоги, знания и файлы. Данные, созданные вами, останутся.</p>
+            <p>{t("settings.every_record_demo_set_will")}</p>
             {error && <div className="integration-form-error">{error}</div>}
             <div className="integration-form-actions">
-              <Button variant="secondary" onClick={() => setConfirmRemove(false)}>Отмена</Button>
-              <Button variant="danger-outline" disabled={submitting} onClick={() => void remove()}>Удалить</Button>
+              <Button variant="secondary" onClick={() => setConfirmRemove(false)}>{t("common.cancel")}</Button>
+              <Button variant="danger-outline" disabled={submitting} onClick={() => void remove()}>{t("common.delete")}</Button>
             </div>
           </div>
         </Modal>
diff --git a/apps/internal-ui/src/features/settings/DemoInstallBanner.tsx b/apps/internal-ui/src/features/settings/DemoInstallBanner.tsx
index b23fdc5..7e6530d 100644
--- a/apps/internal-ui/src/features/settings/DemoInstallBanner.tsx
+++ b/apps/internal-ui/src/features/settings/DemoInstallBanner.tsx
@@ -3,6 +3,7 @@ import { useCallback, useEffect, useRef, useState } from "react";
 import { api } from "../../api/client";
 import { Icon, LogoSpinner } from "../../shared/icons";
 import type { DemoState } from "./DemoDataCard";
+import { t } from "../../i18n";
 
 // Полоса поверх рабочей области, пока worker ставит демо-данные. Без неё
 // человек, поставивший галочку в мастере, видит пустую систему и не понимает,
@@ -47,7 +48,7 @@ export function DemoInstallBanner({ reload }: { reload: () => void }) {
     return (
       <div className="demo-install-banner">
         <LogoSpinner size={17} />
-        <span>Демо-данные устанавливаются — разделы наполнятся через несколько секунд.</span>
+        <span>{t("settings.demo_data_being_installed_sections")}</span>
       </div>
     );
   }
@@ -55,9 +56,9 @@ export function DemoInstallBanner({ reload }: { reload: () => void }) {
     return (
       <div className="demo-install-banner is-done">
         <Icon name="check" size={15} strokeWidth={2.2} />
-        <span>Демо-данные готовы.</span>
-        <button type="button" onClick={() => window.location.reload()}>Показать</button>
-        <button className="demo-install-close" type="button" onClick={() => setDismissed(true)} aria-label="Скрыть">
+        <span>{t("settings.demo_data_ready")}</span>
+        <button type="button" onClick={() => window.location.reload()}>{t("common.show")}</button>
+        <button className="demo-install-close" type="button" onClick={() => setDismissed(true)} aria-label={t("common.hide")}>
           <Icon name="close" size={14} strokeWidth={2} />
         </button>
       </div>
diff --git a/apps/internal-ui/src/features/settings/GroupsSettingsCard.tsx b/apps/internal-ui/src/features/settings/GroupsSettingsCard.tsx
index 20e371a..7f11ce3 100644
--- a/apps/internal-ui/src/features/settings/GroupsSettingsCard.tsx
+++ b/apps/internal-ui/src/features/settings/GroupsSettingsCard.tsx
@@ -3,24 +3,24 @@ import { useEffect, useState } from "react";
 
 import { api } from "../../api/client";
 import { Icon } from "../../shared/icons";
-import { pluralRu } from "../../shared/utils";
 import { fetchConversationCounters, groupColorOf } from "../conversations/model";
 import { Button } from "../../shared/ui-controls";
 import type { EmployeeGroup } from "../../types";
+import { t, tn } from "../../i18n";
 
 // Раздел «Группы» (дизайн-базлайн v2, кадр N2): строка — цветная точка · имя ·
 // состав · диалоги · изменить/удалить; создание — одно поле в подвале списка.
 // Состав группы редактируется на карточке сотрудника.
 
 const GROUP_COLORS: Array<[string, string]> = [
-  ["#1677ff", "Синий"],
-  ["#2aa876", "Зелёный"],
-  ["#eb2f96", "Розовый"],
-  ["#fa8c16", "Оранжевый"],
-  ["#722ed1", "Фиолетовый"],
-  ["#13c2c2", "Бирюзовый"],
-  ["#52c41a", "Салатовый"],
-  ["#f5222d", "Красный"],
+  ["#1677ff", t("shared.blue")],
+  ["#2aa876", t("settings.green")],
+  ["#eb2f96", t("settings.pink")],
+  ["#fa8c16", t("shared.orange")],
+  ["#722ed1", t("settings.purple")],
+  ["#13c2c2", t("shared.teal")],
+  ["#52c41a", t("settings.lime")],
+  ["#f5222d", t("settings.red")],
 ];
 
 export function GroupsSettingsCard({ groups, reload }: { groups: EmployeeGroup[]; reload: () => void }) {
@@ -51,7 +51,7 @@ export function GroupsSettingsCard({ groups, reload }: { groups: EmployeeGroup[]
       setName("");
       reload();
     } catch (caught) {
-      setErrorText(caught instanceof Error ? caught.message : "Не удалось создать группу");
+      setErrorText(caught instanceof Error ? caught.message : t("settings.could_not_create_group"));
     } finally {
       setCreating(false);
     }
@@ -65,7 +65,7 @@ export function GroupsSettingsCard({ groups, reload }: { groups: EmployeeGroup[]
       setRenaming(null);
       reload();
     } catch (caught) {
-      setModalError(caught instanceof Error ? caught.message : "Не удалось переименовать");
+      setModalError(caught instanceof Error ? caught.message : t("settings.could_not_rename"));
     }
   }
 
@@ -77,40 +77,40 @@ export function GroupsSettingsCard({ groups, reload }: { groups: EmployeeGroup[]
       setDeleting(null);
       reload();
     } catch (caught) {
-      setModalError(caught instanceof Error ? caught.message : "Не удалось удалить группу");
+      setModalError(caught instanceof Error ? caught.message : t("settings.could_not_delete_group"));
     }
   }
 
   return (
     <>
       <div className="table-card settings-groups-card">
-        {groups.length === 0 && <p className="settings-groups-empty">Групп пока нет — все сотрудники видят все диалоги.</p>}
+        {groups.length === 0 && <p className="settings-groups-empty">{t("admin.there_no_groups_yet_so_2")}</p>}
         {groups.map((group) => (
           <div className="settings-group-row" key={group.id}>
             <i className="chat-scope-dot" style={{ background: groupColorOf(group.id, group.color) }} />
             <strong>{group.name}</strong>
-            <small>{group.memberCount} чел.</small>
-            <small className="settings-group-dialogs">{pluralRu(dialogs[group.id] ?? 0, ["диалог", "диалога", "диалогов"])}</small>
+            <small>{t("admin.people_count", { count: group.memberCount })}</small>
+            <small className="settings-group-dialogs">{tn("plural.conversations", dialogs[group.id] ?? 0)}</small>
             <div className="settings-group-actions">
-              <button aria-label="Изменить" title="Изменить" type="button" onClick={() => { setModalError(""); setRenaming(group); setRenameValue(group.name); setRenameColor(group.color || groupColorOf(group.id)); }}><Icon name="edit" size={14} /></button>
-              <button aria-label="Удалить" title="Удалить" className="is-danger" type="button" onClick={() => { setModalError(""); setDeleting(group); }}><Icon name="trash" size={14} /></button>
+              <button aria-label={t("common.edit")} title={t("common.edit")} type="button" onClick={() => { setModalError(""); setRenaming(group); setRenameValue(group.name); setRenameColor(group.color || groupColorOf(group.id)); }}><Icon name="edit" size={14} /></button>
+              <button aria-label={t("common.delete")} title={t("common.delete")} className="is-danger" type="button" onClick={() => { setModalError(""); setDeleting(group); }}><Icon name="trash" size={14} /></button>
             </div>
           </div>
         ))}
         <div className="settings-group-create">
           <input
-            placeholder="Название новой группы"
+            placeholder={t("settings.new_group_name")}
             value={name}
             onChange={(event) => setName(event.target.value)}
             onKeyDown={(event) => { if (event.key === "Enter") void create(); }}
           />
-          <Button variant="secondary" icon="plus" disabled={!name.trim() || creating} onClick={() => void create()}>Создать</Button>
+          <Button variant="secondary" icon="plus" disabled={!name.trim() || creating} onClick={() => void create()}>{t("ai.create_2")}</Button>
         </div>
       </div>
       {errorText && <div className="settings-section-error">{errorText}</div>}
-      <p className="settings-section-note">Состав группы редактируется на карточке сотрудника. Диалоги без группы видят все сотрудники.</p>
+      <p className="settings-section-note">{t("settings.group_membership_edited_operator_card")}</p>
       {renaming && (
-        <Modal open title="Группа" onCancel={() => setRenaming(null)} footer={null} destroyOnClose>
+        <Modal open title={t("common.group")} onCancel={() => setRenaming(null)} footer={null} destroyOnClose>
           <div className="integration-form">
             <input className="settings-modal-input" value={renameValue} onChange={(event) => setRenameValue(event.target.value)} />
             {/* Цвет точки группы в чате (дизайн-базлайн v2) — тот же стандарт свотчей, что у акцента. */}
@@ -121,20 +121,20 @@ export function GroupsSettingsCard({ groups, reload }: { groups: EmployeeGroup[]
             </div>
             {modalError && <div className="integration-form-error">{modalError}</div>}
             <div className="integration-form-actions">
-              <Button variant="secondary" onClick={() => setRenaming(null)}>Отмена</Button>
-              <Button variant="primary" disabled={!renameValue.trim()} onClick={() => void rename()}>Сохранить</Button>
+              <Button variant="secondary" onClick={() => setRenaming(null)}>{t("common.cancel")}</Button>
+              <Button variant="primary" disabled={!renameValue.trim()} onClick={() => void rename()}>{t("common.save")}</Button>
             </div>
           </div>
         </Modal>
       )}
       {deleting && (
-        <Modal open title="Удалить группу?" onCancel={() => setDeleting(null)} footer={null} destroyOnClose>
+        <Modal open title={t("settings.delete_group")} onCancel={() => setDeleting(null)} footer={null} destroyOnClose>
           <div className="integration-form">
-            <p>{`«${deleting.name}» будет удалена; её диалоги станут «Без группы».`}</p>
+            <p>{t("admin.group_will_be_deleted", { name: deleting.name })}</p>
             {modalError && <div className="integration-form-error">{modalError}</div>}
             <div className="integration-form-actions">
-              <Button variant="secondary" onClick={() => setDeleting(null)}>Отмена</Button>
-              <Button variant="danger-outline" onClick={() => void remove()}>Удалить</Button>
+              <Button variant="secondary" onClick={() => setDeleting(null)}>{t("common.cancel")}</Button>
+              <Button variant="danger-outline" onClick={() => void remove()}>{t("common.delete")}</Button>
             </div>
           </div>
         </Modal>
diff --git a/apps/internal-ui/src/features/settings/PlatformSettingsCard.tsx b/apps/internal-ui/src/features/settings/PlatformSettingsCard.tsx
index baec683..269f57b 100644
--- a/apps/internal-ui/src/features/settings/PlatformSettingsCard.tsx
+++ b/apps/internal-ui/src/features/settings/PlatformSettingsCard.tsx
@@ -11,6 +11,7 @@ import {
   type EmailPayload,
   type InstancePayload,
 } from "./instance";
+import { t } from "../../i18n";
 
 // «Платформа» (Настройки): свойства инсталляции, а не организации. Адрес
 // запомнил мастер первого запуска — по нему человек и зашёл, поднимая докер на
@@ -42,8 +43,8 @@ function emailDraftOf(email: EmailPayload): EmailDraft {
 }
 
 function savedLabel(updatedAt: string | null): string {
-  if (!updatedAt) return "Ещё не сохранялось";
-  return `Сохранено ${shortDateTime(updatedAt)}`;
+  if (!updatedAt) return t("common.never_saved_yet");
+  return t("time.saved_at", { time: shortDateTime(updatedAt) });
 }
 
 export function PlatformSettingsCard({ canManage }: { canManage: boolean }) {
@@ -53,7 +54,7 @@ export function PlatformSettingsCard({ canManage }: { canManage: boolean }) {
   useEffect(() => {
     loadInstance()
       .then(setCurrent)
-      .catch(() => setLoadError("Не удалось загрузить настройки установки"));
+      .catch(() => setLoadError(t("settings.could_not_load_installation_settings")));
   }, []);
 
   if (loadError) return <div className="settings-section-error">{loadError}</div>;
@@ -62,11 +63,69 @@ export function PlatformSettingsCard({ canManage }: { canManage: boolean }) {
   return (
     <>
       <AddressCard canManage={canManage} current={current} onSaved={setCurrent} />
+      <LanguageCard canManage={canManage} current={current} onSaved={setCurrent} />
       <EmailCard canManage={canManage} current={current} onSaved={setCurrent} />
     </>
   );
 }
 
+// Язык установки — свойство инсталляции, а не организации: на нём открываются
+// экраны, где организации ещё нет. Отдельной карточкой рядом с адресом, потому
+// что и адрес, и язык здесь — про саму коробку.
+function LanguageCard({ canManage, current, onSaved }: {
+  canManage: boolean;
+  current: InstancePayload;
+  onSaved: (payload: InstancePayload) => void;
+}) {
+  const [busy, setBusy] = useState(false);
+  const [errorText, setErrorText] = useState("");
+
+  async function save(language: string) {
+    if (language === current.defaultLanguage) return;
+    setBusy(true);
+    setErrorText("");
+    try {
+      // Адрес уходит вместе с языком: PATCH проверяет его в любом случае, и
+      // без него сохранение языка упало бы на «Укажите адрес установки».
+      onSaved(await patchInstance({
+        publicHost: current.publicHost,
+        publicScheme: current.publicScheme,
+        defaultLanguage: language,
+      }));
+    } catch (error) {
+      setErrorText(instanceError(error).detail);
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  return (
+    <div className="administration-card">
+      <div className="settings-card-head">
+        <div>
+          <strong>{t("settings.language_instance")}</strong>
+          <small>{t("settings.language_instance_hint")}</small>
+        </div>
+        <div className="appearance-theme-options">
+          {current.languages.map((item) => (
+            <button
+              className={current.defaultLanguage === item.code ? "active" : ""}
+              disabled={!canManage || busy}
+              key={item.code}
+              lang={item.code}
+              type="button"
+              onClick={() => void save(item.code)}
+            >
+              {item.label}
+            </button>
+          ))}
+        </div>
+      </div>
+      {errorText && <div className="administration-message error" role="alert">{errorText}</div>}
+    </div>
+  );
+}
+
 function AddressCard({ canManage, current, onSaved }: {
   canManage: boolean;
   current: InstancePayload;
@@ -91,7 +150,7 @@ function AddressCard({ canManage, current, onSaved }: {
       onSaved(payload);
       setHost(payload.publicHost);
       setScheme(payload.publicScheme);
-      setMessage("Сохранено. Ссылки на файлы пойдут по этому адресу.");
+      setMessage(t("settings.saved_file_links_will_use"));
     } catch (error) {
       const { detail, errors } = instanceError(error);
       setErrorText(detail);
@@ -110,8 +169,8 @@ function AddressCard({ canManage, current, onSaved }: {
     <form className="administration-card" onSubmit={submit}>
       <div className="settings-card-head">
         <div>
-          <strong>Адрес установки</strong>
-          <small>По нему открывают систему и по нему строятся ссылки на файлы</small>
+          <strong>{t("settings.installation_address")}</strong>
+          <small>{t("settings.system_opened_at_file_links")}</small>
         </div>
         <div className="appearance-theme-options">
           {(["http", "https"] as const).map((value) => (
@@ -128,15 +187,13 @@ function AddressCard({ canManage, current, onSaved }: {
         </div>
       </div>
       <p className="settings-section-note">
-        Пока домена нет, здесь стоит адрес сервера — тот, на котором вы прошли первый запуск.
-        Заведёте домен и поставите перед установкой TLS — впишите его и переключите на https.
-        Ссылки будут вида <b>{scheme}://{host || "адрес"}/…</b>
+        {t("settings.address_hint")} <b>{scheme}://{host || t("settings.address_placeholder")}/…</b>
       </p>
       <div className="administration-fields">
         <FormField
           disabled={!canManage}
           error={fieldErrors.publicHost}
-          label="Домен или IP"
+          label={t("settings.domain_or_ip")}
           mono
           placeholder="crm.example.com"
           value={host}
@@ -149,7 +206,7 @@ function AddressCard({ canManage, current, onSaved }: {
         <div className="administration-actions">
           <small className="administration-saved">{message || savedLabel(current.updatedAt)}</small>
           <Button type="submit" variant="primary" disabled={busy || !host.trim()}>
-            {busy ? "Сохранение" : "Сохранить"}
+            {busy ? t("common.saving") : t("common.save")}
           </Button>
         </div>
       )}
@@ -189,7 +246,7 @@ function EmailCard({ canManage, current, onSaved }: {
       });
       onSaved(payload);
       setDraft(emailDraftOf(payload.email));
-      setMessage("Сохранено. Письма пойдут через этот сервер.");
+      setMessage(t("settings.saved_email_will_go_through"));
     } catch (error) {
       const { detail, errors } = instanceError(error);
       setErrorText(detail);
@@ -205,7 +262,7 @@ function EmailCard({ canManage, current, onSaved }: {
     setErrorText("");
     try {
       const sent = await checkInstanceEmail();
-      setMessage(`Письмо отправлено на ${sent}. Не пришло — проверьте папку «Спам».`);
+      setMessage(t("settings.email_sent_to", { email: sent }));
     } catch (error) {
       setErrorText(instanceError(error).detail);
     } finally {
@@ -222,8 +279,8 @@ function EmailCard({ canManage, current, onSaved }: {
     <form className="administration-card" onSubmit={submit}>
       <div className="settings-card-head">
         <div>
-          <strong>Исходящая почта</strong>
-          <small>Приглашения сотрудникам и сброс пароля</small>
+          <strong>{t("settings.outgoing_email")}</strong>
+          <small>{t("settings.operator_invitations_password_resets")}</small>
         </div>
         {/* Шифрование канала до SMTP — двоичный выбор, значит переключатель
             (тот же стандарт, что у точек входа в «Голосовых и звонках»). */}
@@ -233,21 +290,19 @@ function EmailCard({ canManage, current, onSaved }: {
             checked={draft.useTls}
             className="ui-switch is-compact"
             disabled={!canManage || Boolean(busy)}
-            label="Шифрование TLS до SMTP-сервера"
+            label={t("settings.tls_encryption_smtp_server")}
             onClick={() => { setDraft({ ...draft, useTls: !draft.useTls }); touch(); }}
           />
         </div>
       </div>
       {!current.email.configured && (
-        <p className="settings-section-note">
-          Почта не настроена: письма никуда не уходят, пригласить сотрудника не получится.
-        </p>
+        <p className="settings-section-note">{t("settings.email_not_configured_nothing_sent")}</p>
       )}
       <div className="administration-fields">
         <FormField
           disabled={!canManage}
           error={fieldErrors.emailHost}
-          label="SMTP-сервер"
+          label={t("settings.smtp_server")}
           mono
           placeholder="smtp.example.com"
           value={draft.host}
@@ -256,7 +311,7 @@ function EmailCard({ canManage, current, onSaved }: {
         <FormField
           disabled={!canManage}
           error={fieldErrors.emailPort}
-          label="Порт"
+          label={t("settings.port")}
           mono
           placeholder="587"
           value={draft.port}
@@ -264,7 +319,7 @@ function EmailCard({ canManage, current, onSaved }: {
         />
         <FormField
           disabled={!canManage}
-          label="Пользователь"
+          label={t("settings.user")}
           mono
           placeholder="robot@example.com"
           value={draft.user}
@@ -272,16 +327,16 @@ function EmailCard({ canManage, current, onSaved }: {
         />
         <FormField
           disabled={!canManage}
-          label="Пароль"
+          label={t("common.password")}
           mono
-          placeholder={current.email.hasPassword ? "•••••••• (сохранён)" : ""}
+          placeholder={current.email.hasPassword ? t("settings.saved") : ""}
           type="password"
           value={draft.password}
           onChange={set("password")}
         />
         <FormField
           disabled={!canManage}
-          label="Отправитель"
+          label={t("settings.sender")}
           placeholder="Chatballs <no-reply@example.com>"
           value={draft.from}
           wide
@@ -295,11 +350,11 @@ function EmailCard({ canManage, current, onSaved }: {
           <small className="administration-saved">{savedLabel(current.updatedAt)}</small>
           {current.email.configured && (
             <Button variant="secondary" disabled={Boolean(busy)} onClick={() => void check()}>
-              {busy === "check" ? "Отправляем…" : "Отправить тестовое письмо"}
+              {busy === "check" ? t("settings.sending") : t("settings.send_test_email")}
             </Button>
           )}
           <Button type="submit" variant="primary" disabled={Boolean(busy)}>
-            {busy === "save" ? "Сохранение" : "Сохранить"}
+            {busy === "save" ? t("common.saving") : t("common.save")}
           </Button>
         </div>
       )}
diff --git a/apps/internal-ui/src/features/settings/SettingsPage.tsx b/apps/internal-ui/src/features/settings/SettingsPage.tsx
index 4b095a8..46b48bb 100644
--- a/apps/internal-ui/src/features/settings/SettingsPage.tsx
+++ b/apps/internal-ui/src/features/settings/SettingsPage.tsx
@@ -19,6 +19,7 @@ import { StorageSettingsCard } from "./StorageSettingsCard";
 import { GroupsSettingsCard } from "./GroupsSettingsCard";
 import { DEFAULT_SETTINGS_SECTION, SETTINGS_SECTIONS, type SettingsSectionKey } from "./sections";
 import { useIntegrations } from "./useIntegrations";
+import { t } from "../../i18n";
 
 // «Настройки» (дизайн-базлайн v2, кадры N1–N7): субменю разделов 240px и один
 // раздел на экране; ниже субменю — переходы на отдельные экраны «База знаний» и
@@ -42,7 +43,7 @@ export function SettingsPage({ user, onUserUpdated, reload, groups = [], section
   // Кадр M: на узком экране субменю и раздел — два отдельных экрана.
   const mobile = useMediaQuery("(max-width: 900px)");
 
-  if (!manager) return <EmptyState title="Настройки доступны владельцу и администратору" />;
+  if (!manager) return <EmptyState title={t("settings.settings_available_owner_administrators")} />;
 
   const providers = integrations.items.filter((item) => item.kind === "LLM_PROVIDER");
   const connections = integrations.items.filter((item) => item.kind === "MESSENGER");
@@ -58,16 +59,16 @@ export function SettingsPage({ user, onUserUpdated, reload, groups = [], section
   const links = (
     <>
       <div className="settings-subnav-divider" />
-      <div className="settings-subnav-caption">Отдельные экраны</div>
+      <div className="settings-subnav-caption">{t("settings.separate_screens")}</div>
       <button className="settings-subnav-link" type="button" onClick={() => setRoute("administrationAudit")}>
-        <Icon name="list" size={16} strokeWidth={1.9} /><span>Аудит действий</span><Icon name="external" size={13} strokeWidth={2} />
+        <Icon name="list" size={16} strokeWidth={1.9} /><span>{t("settings.action_audit")}</span><Icon name="external" size={13} strokeWidth={2} />
       </button>
     </>
   );
 
   const subnav = (
     <nav className={`settings-subnav ${mobile && current ? "is-hidden" : ""}`}>
-      <div className="settings-subnav-head"><h2>Настройки</h2></div>
+      <div className="settings-subnav-head"><h2>{t("common.settings")}</h2></div>
       <div className="settings-subnav-list">
         {SETTINGS_SECTIONS.map((item) => (
           <button
@@ -79,7 +80,7 @@ export function SettingsPage({ user, onUserUpdated, reload, groups = [], section
             <Icon name={item.icon} size={16} strokeWidth={1.9} />
             <span>{item.label}</span>
             {counts[item.key] !== undefined && counts[item.key]! > 0 && <small>{counts[item.key]}</small>}
-            {item.key === "integrations" && connectionsFailed && item.key !== active && <i className="settings-subnav-warn" title="Есть ошибка" />}
+            {item.key === "integrations" && connectionsFailed && item.key !== active && <i className="settings-subnav-warn" title={t("settings.there_error")} />}
             {/* Кадр M: на узком экране у пункта — шеврон перехода. */}
             <span className="settings-subnav-chevron"><Icon name="chevronRight" size={16} strokeWidth={2} /></span>
           </button>
@@ -90,9 +91,9 @@ export function SettingsPage({ user, onUserUpdated, reload, groups = [], section
   );
 
   const headAction = current?.key === "ai"
-    ? <Button variant="primary" icon="plus" onClick={() => setForm({ kind: "LLM_PROVIDER", initial: null })}>Добавить провайдера</Button>
+    ? <Button variant="primary" icon="plus" onClick={() => setForm({ kind: "LLM_PROVIDER", initial: null })}>{t("settings.add_provider")}</Button>
     : current?.key === "integrations"
-      ? <Button variant="primary" icon="plus" onClick={() => setForm({ kind: "MESSENGER", initial: null })}>Добавить подключение</Button>
+      ? <Button variant="primary" icon="plus" onClick={() => setForm({ kind: "MESSENGER", initial: null })}>{t("settings.add_connection")}</Button>
       : null;
 
   return (
@@ -103,7 +104,7 @@ export function SettingsPage({ user, onUserUpdated, reload, groups = [], section
           <div className="settings-content-inner">
             <header className="settings-head">
               {mobile && (
-                <button className="settings-head-back" type="button" aria-label="К списку разделов" onClick={() => openSection(null)}>
+                <button className="settings-head-back" type="button" aria-label={t("settings.back_section_list")} onClick={() => openSection(null)}>
                   <Icon name="chevronLeft" size={18} />
                 </button>
               )}
@@ -157,7 +158,7 @@ function SectionBody({ section, user, onUserUpdated, reload, groups, integration
   if (section === "storage") return <StorageSettingsCard canManage={canManageSettings(user)} />;
   if (section === "demo") return <DemoDataCard reload={reload} />;
   if (integrations.loading) return <LoadingState />;
-  if (integrations.failed) return <EmptyState title="Не удалось загрузить интеграции" />;
+  if (integrations.failed) return <EmptyState title={t("settings.could_not_load_integrations")} />;
   return (
     <IntegrationsSection
       kind={section === "ai" ? "LLM_PROVIDER" : "MESSENGER"}
@@ -171,7 +172,7 @@ function SectionBody({ section, user, onUserUpdated, reload, groups, integration
 function OrganizationSection({ user, onUserUpdated }: { user: SessionUser; onUserUpdated: (user: SessionUser) => void }) {
   const page = useAdministration({ section: "organization", user, onUserUpdated });
   if (page.loading) return <LoadingState />;
-  if (!page.organization) return <EmptyState title={page.error || "Не удалось загрузить настройки"} />;
+  if (!page.organization) return <EmptyState title={page.error || t("settings.could_not_load_settings")} />;
   // Раздел равен кадру N1: одна карточка. Адрес установки, почта и relay —
   // свойства инсталляции и живут в «Платформе» и «Голосовых и звонках».
   return (
@@ -182,6 +183,7 @@ function OrganizationSection({ user, onUserUpdated }: { user: SessionUser; onUse
       message={page.message}
       error={page.error}
       timezones={page.timezones}
+      languages={page.languages}
       onChange={page.setOrganization}
       onSave={() => void page.save()}
       onUploadLogo={(file) => void page.uploadLogo(file)}
diff --git a/apps/internal-ui/src/features/settings/StorageSettingsCard.tsx b/apps/internal-ui/src/features/settings/StorageSettingsCard.tsx
index 6b8f8c1..aee4bab 100644
--- a/apps/internal-ui/src/features/settings/StorageSettingsCard.tsx
+++ b/apps/internal-ui/src/features/settings/StorageSettingsCard.tsx
@@ -5,6 +5,7 @@ import { FormField, SelectField } from "../../shared/form-controls";
 import { Icon } from "../../shared/icons";
 import { shortDateTime } from "../../shared/utils";
 import { Button } from "../../shared/ui-controls";
+import { fmt, t } from "../../i18n";
 
 // «Хранилище файлов» (Настройки): по умолчанию локальный диск установки, по
 // желанию — внешнее S3-совместимое хранилище. Секреты не возвращаются с сервера:
@@ -53,9 +54,9 @@ function draftOf(payload: StoragePayload): Draft {
 function errorMessage(error: unknown): { detail: string; errors: Record<string, string> } {
   if (error && typeof error === "object" && "payload" in error) {
     const payload = (error as { payload?: { detail?: string; errors?: Record<string, string> } }).payload;
-    return { detail: payload?.detail ?? "Не удалось сохранить", errors: payload?.errors ?? {} };
+    return { detail: payload?.detail ?? t("common.could_not_save"), errors: payload?.errors ?? {} };
   }
-  return { detail: error instanceof Error ? error.message : "Не удалось сохранить", errors: {} };
+  return { detail: error instanceof Error ? error.message : t("common.could_not_save"), errors: {} };
 }
 
 export function StorageSettingsCard({ canManage }: { canManage: boolean }) {
@@ -73,7 +74,7 @@ export function StorageSettingsCard({ canManage }: { canManage: boolean }) {
     return payload.storage;
   }
 
-  useEffect(() => { void load().catch(() => setErrorText("Не удалось загрузить настройки хранилища")); }, []);
+  useEffect(() => { void load().catch(() => setErrorText(t("settings.could_not_load_storage_settings"))); }, []);
 
   // Пока идёт перенос — опрашиваем прогресс.
   useEffect(() => {
@@ -98,14 +99,14 @@ export function StorageSettingsCard({ canManage }: { canManage: boolean }) {
         const payload = await api<{ storage: StoragePayload }>(BASE, { method: "PATCH", body: JSON.stringify(draft) });
         setCurrent(payload.storage);
         setDraft(draftOf(payload.storage));
-        setMessage(payload.storage.backend === "S3" ? "Сохранено. Новые файлы пишутся в S3, доступ проверен." : "Сохранено. Файлы хранятся на диске установки.");
+        setMessage(payload.storage.backend === "S3" ? t("settings.saved_new_files_go_s3") : t("settings.saved_files_kept_installation_disk"));
       } else if (kind === "check") {
         await api<{ ok: boolean }>(`${BASE}check/`, { method: "POST", body: JSON.stringify(draft) });
-        setMessage("Хранилище доступно: пробный объект записан и удалён.");
+        setMessage(t("settings.storage_reachable_test_object_was"));
       } else {
         const payload = await api<{ storage: StoragePayload }>(`${BASE}migrate/`, { method: "POST" });
         setCurrent(payload.storage);
-        setMessage("Перенос запущен — идёт в фоне.");
+        setMessage(t("settings.migration_has_started_runs_background"));
       }
     } catch (error) {
       const { detail, errors } = errorMessage(error);
@@ -123,45 +124,45 @@ export function StorageSettingsCard({ canManage }: { canManage: boolean }) {
 
   const migration = current.migration;
   const migrationLabel = migration.status === "RUNNING"
-    ? `Перенос: ${migration.done} из ${migration.total || "…"}`
+    ? t("settings.migration_progress", { done: migration.done, total: migration.total || "…" })
     : migration.status === "DONE"
-      ? `Перенос завершён: ${migration.done} файлов`
+      ? t("settings.migration_done", { done: migration.done })
       : migration.status === "FAILED"
-        ? `Перенос прерван: ${migration.error}`
+        ? t("settings.migration_failed", { error: migration.error })
         : "";
 
   return (
     <form className="administration-card storage-card" onSubmit={submit}>
       <div className="settings-card-head">
         <div>
-          <strong>Где хранить файлы</strong>
-          <small>Вложения знаний, голосовые, фото и логотипы</small>
+          <strong>{t("settings.where_keep_files")}</strong>
+          <small>{t("settings.knowledge_attachments_voice_messages_photos")}</small>
         </div>
         <div className="appearance-theme-options">
-          {([["LOCAL", "На диске установки"], ["S3", "Внешнее S3"]] as Array<[StorageBackend, string]>).map(([value, label]) => (
+          {([["LOCAL", t("settings.installation_disk")], ["S3", t("settings.external_s3")]] as Array<[StorageBackend, string]>).map(([value, label]) => (
             <button key={value} type="button" className={draft.backend === value ? "active" : ""} disabled={!canManage || Boolean(busy)} onClick={() => set("backend")(value)}>{label}</button>
           ))}
         </div>
       </div>
       <p className="settings-section-note">
         {isS3
-          ? "Вложения знаний, голосовые, фото и логотипы будут записываться в бакет под префиксами организаций. Уже загруженные файлы остаются доступны с диска, пока не перенесены."
-          : "Файлы лежат в каталоге data/media установки. Подходит для одного сервера; для нескольких экземпляров или резервирования включите S3."}
+          ? t("settings.knowledge_attachments_voice_messages_photos_2")
+          : t("settings.files_live_installation_s_data")}
       </p>
       {isS3 && (
         <div className="administration-fields storage-fields">
-          <FormField label="Бакет" value={draft.s3Bucket} error={fieldErrors.s3Bucket} disabled={!canManage} onChange={set("s3Bucket")} placeholder="chatballs-files" />
-          <FormField label="Регион" value={draft.s3Region} error={fieldErrors.s3Region} disabled={!canManage} onChange={set("s3Region")} placeholder="ru-central1" />
-          <FormField label="Endpoint (для не-AWS провайдеров)" value={draft.s3EndpointUrl} error={fieldErrors.s3EndpointUrl} disabled={!canManage} onChange={set("s3EndpointUrl")} placeholder="https://storage.example.com" wide />
-          <SelectField label="Адресация" value={draft.s3AddressingStyle} disabled={!canManage} onChange={set("s3AddressingStyle")} options={[["path", "path (bucket в пути)"], ["virtual", "virtual-host (bucket в домене)"]]} />
+          <FormField label={t("settings.bucket")} value={draft.s3Bucket} error={fieldErrors.s3Bucket} disabled={!canManage} onChange={set("s3Bucket")} placeholder="chatballs-files" />
+          <FormField label={t("settings.region")} value={draft.s3Region} error={fieldErrors.s3Region} disabled={!canManage} onChange={set("s3Region")} placeholder="ru-central1" />
+          <FormField label={t("settings.endpoint_non_aws_providers")} value={draft.s3EndpointUrl} error={fieldErrors.s3EndpointUrl} disabled={!canManage} onChange={set("s3EndpointUrl")} placeholder="https://storage.example.com" wide />
+          <SelectField label={t("settings.addressing")} value={draft.s3AddressingStyle} disabled={!canManage} onChange={set("s3AddressingStyle")} options={[["path", t("settings.path_bucket_path")], ["virtual", t("settings.virtual_host_bucket_domain")]]} />
           <FormField label="Access Key" value={draft.s3AccessKey} error={fieldErrors.s3AccessKey} disabled={!canManage} onChange={set("s3AccessKey")} placeholder={current.s3AccessKeyMasked || "AKIA…"} mono />
-          <FormField label="Secret Key" type="password" value={draft.s3SecretKey} error={fieldErrors.s3SecretKey} disabled={!canManage} onChange={set("s3SecretKey")} placeholder={current.s3HasSecretKey ? "•••••••• (сохранён)" : ""} mono />
+          <FormField label="Secret Key" type="password" value={draft.s3SecretKey} error={fieldErrors.s3SecretKey} disabled={!canManage} onChange={set("s3SecretKey")} placeholder={current.s3HasSecretKey ? t("settings.saved") : ""} mono />
         </div>
       )}
       {isS3 && current.s3VerifiedAt && !current.s3LastError && (
         <div className="settings-storage-status">
           <Icon name="check" size={15} />
-          <span>Доступ проверен {shortDateTime(current.s3VerifiedAt)}{migrationLabel ? ` · ${migrationLabel.toLocaleLowerCase("ru-RU")}` : ""}</span>
+          <span>{t("settings.access_checked_at", { date: shortDateTime(current.s3VerifiedAt) })}{migrationLabel ? ` · ${migrationLabel.toLocaleLowerCase(fmt.tag())}` : ""}</span>
         </div>
       )}
       {migrationLabel && (!isS3 || !current.s3VerifiedAt || Boolean(current.s3LastError)) && <p className="settings-section-note">{migrationLabel}</p>}
@@ -170,10 +171,10 @@ export function StorageSettingsCard({ canManage }: { canManage: boolean }) {
       {canManage && (
         <div className="administration-actions storage-actions">
           {isS3 && current.backend === "S3" && current.s3Configured && migration.status !== "RUNNING" && (
-            <Button variant="secondary" disabled={Boolean(busy)} onClick={() => void run("migrate")}>Перенести файлы с диска</Button>
+            <Button variant="secondary" disabled={Boolean(busy)} onClick={() => void run("migrate")}>{t("settings.migrate_files_from_disk")}</Button>
           )}
-          {isS3 && <Button variant="secondary" disabled={Boolean(busy)} onClick={() => void run("check")}>{busy === "check" ? "Проверяем…" : "Проверить доступ"}</Button>}
-          <Button type="submit" variant="primary" disabled={Boolean(busy)}>{busy === "save" ? "Сохранение" : "Сохранить"}</Button>
+          {isS3 && <Button variant="secondary" disabled={Boolean(busy)} onClick={() => void run("check")}>{busy === "check" ? t("settings.checking") : t("settings.check_access")}</Button>}
+          <Button type="submit" variant="primary" disabled={Boolean(busy)}>{busy === "save" ? t("common.saving") : t("common.save")}</Button>
         </div>
       )}
     </form>
diff --git a/apps/internal-ui/src/features/settings/instance.ts b/apps/internal-ui/src/features/settings/instance.ts
index c88462e..e9a3ba0 100644
--- a/apps/internal-ui/src/features/settings/instance.ts
+++ b/apps/internal-ui/src/features/settings/instance.ts
@@ -1,4 +1,5 @@
 import { api } from "../../api/client";
+import { t } from "../../i18n";
 
 // Настройки инсталляции (раздел «Платформа» и карточка relay в «Голосовых и
 // звонках»). Один эндпоинт на всю установку: адрес, исходящая почта и TURN.
@@ -20,6 +21,9 @@ export type InstancePayload = {
   publicScheme: "http" | "https";
   publicUrl: string;
   updatedAt: string | null;
+  // Язык экранов до входа и умолчание для организаций без своего языка.
+  defaultLanguage: string;
+  languages: Array<{ code: string; label: string }>;
   email: EmailPayload;
   turn: { urls: string[]; ttlSeconds: number; secretReady: boolean };
 };
@@ -47,7 +51,7 @@ export function checkInstanceEmail(): Promise<string> {
 export function instanceError(error: unknown): { detail: string; errors: Record<string, string> } {
   if (error && typeof error === "object" && "payload" in error) {
     const payload = (error as { payload?: { detail?: string; errors?: Record<string, string> } }).payload;
-    return { detail: payload?.detail ?? "Не удалось сохранить", errors: payload?.errors ?? {} };
+    return { detail: payload?.detail ?? t("common.could_not_save"), errors: payload?.errors ?? {} };
   }
-  return { detail: error instanceof Error ? error.message : "Не удалось сохранить", errors: {} };
+  return { detail: error instanceof Error ? error.message : t("common.could_not_save"), errors: {} };
 }
diff --git a/apps/internal-ui/src/features/settings/sections.ts b/apps/internal-ui/src/features/settings/sections.ts
index a521353..b95c76f 100644
--- a/apps/internal-ui/src/features/settings/sections.ts
+++ b/apps/internal-ui/src/features/settings/sections.ts
@@ -1,4 +1,5 @@
 import type { Icon } from "../../shared/icons";
+import { t } from "../../i18n";
 
 // Разделы «Настроек» (дизайн-базлайн v2, кадры N1–N7): субменю 240px и один
 // раздел на экране вместо сплошной ленты секций. Профиль пользователя сюда не
@@ -25,61 +26,61 @@ export type SettingsSection = {
 export const SETTINGS_SECTIONS: SettingsSection[] = [
   {
     key: "organization",
-    label: "Организация",
+    label: t("settings.organization"),
     icon: "building",
-    heading: "Организация",
-    lead: "Название, логотип и региональные параметры. Видны сотрудникам, в виджете и письмах.",
+    heading: t("settings.organization"),
+    lead: t("settings.name_logo_regional_settings_visible"),
     // Адрес установки и почта сюда не входят — это свойства инсталляции, а не
     // организации, и живут в разделе «Платформа». Раздел равен кадру N1.
   },
   {
     key: "groups",
-    label: "Группы",
+    label: t("common.groups"),
     icon: "team",
-    heading: "Группы",
-    lead: "Делят диалоги между сотрудниками: сотрудник видит диалоги своих групп, без группы и те, где он ответственный.",
+    heading: t("common.groups"),
+    lead: t("settings.they_split_conversations_between_operators"),
   },
   {
     key: "ai",
-    label: "AI-провайдер",
+    label: t("settings.ai_provider"),
     icon: "sparkles",
-    heading: "AI-провайдер",
-    lead: "Ключи вашей организации для ответов агентов и расшифровки голосовых. Модель выбирается на карточке агента.",
+    heading: t("settings.ai_provider"),
+    lead: t("settings.organization_s_keys_agent_replies"),
   },
   {
     key: "integrations",
-    label: "Интеграции",
+    label: t("common.integrations"),
     icon: "plug",
-    heading: "Интеграции",
-    lead: "Боты, почта и Web-виджет — точки входа диалогов. Каждая привязана к агенту, который отвечает первым.",
+    heading: t("common.integrations"),
+    lead: t("settings.bots_email_web_widget_entry"),
   },
   {
     key: "communication",
-    label: "Голосовые и звонки",
+    label: t("settings.voice_calls"),
     icon: "mic",
-    heading: "Голосовые и звонки",
-    lead: "Где клиент и сотрудник могут записывать голосовые и начинать аудио- и видеозвонки.",
+    heading: t("settings.voice_calls"),
+    lead: t("settings.where_customer_operator_can_record"),
   },
   {
     key: "storage",
-    label: "Хранилище файлов",
+    label: t("settings.file_storage"),
     icon: "database",
-    heading: "Хранилище файлов",
-    lead: "Вложения, голосовые, фото и логотипы — на диске установки или во внешнем S3-совместимом хранилище.",
+    heading: t("settings.file_storage"),
+    lead: t("settings.attachments_voice_messages_photos_logos"),
   },
   {
     key: "platform",
-    label: "Платформа",
+    label: t("settings.platform"),
     icon: "globe",
-    heading: "Платформа",
-    lead: "Свойства самой установки: адрес, по которому её открывают и по которому строятся ссылки на файлы, и почтовый сервер для приглашений и сброса пароля.",
+    heading: t("settings.platform"),
+    lead: t("settings.properties_installation_itself_address_opened"),
   },
   {
     key: "demo",
-    label: "Демо-данные",
+    label: t("settings.demo_data"),
     icon: "sun",
-    heading: "Демо-данные",
-    lead: "Посмотреть систему в работе на вымышленной организации.",
+    heading: t("settings.demo_data"),
+    lead: t("settings.see_system_at_work_fictional"),
   },
 ];
 
diff --git a/apps/internal-ui/src/features/support-portals/PortalAppearanceSettings.tsx b/apps/internal-ui/src/features/support-portals/PortalAppearanceSettings.tsx
index 89b6c45..86d4358 100644
--- a/apps/internal-ui/src/features/support-portals/PortalAppearanceSettings.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalAppearanceSettings.tsx
@@ -11,6 +11,7 @@ import {
 } from "../help-center/themes/registry";
 import type { PortalThemeManifest, PortalThemeSchemeSetting } from "../help-center/themes/types";
 import { portalErrorMessage, updateSupportPortal, type SupportPortal } from "./model";
+import { t } from "../../i18n";
 
 // Кадр PT6: тема выбирается карточкой с мини-превью на цветах манифеста. Ни
 // названия, ни описания, ни цвета в UI не придумываются — всё из манифеста
@@ -67,7 +68,7 @@ export function PortalAppearanceSettings({
       onChanged(payload.portal);
       setSavedAt(payload.portal.updatedAt);
     } catch (caught) {
-      setFeedback(portalErrorMessage(caught, "Не удалось сохранить оформление"));
+      setFeedback(portalErrorMessage(caught, t("portals.could_not_save_appearance")));
     } finally {
       setBusy(false);
     }
@@ -76,7 +77,7 @@ export function PortalAppearanceSettings({
   return (
     <div className="portal-settings-card">
       <div>
-        <span className="portal-field-label">Тема</span>
+        <span className="portal-field-label">{t("profile.theme")}</span>
         <div className="portal-theme-grid">
           {themes.map((item) => (
             <button
@@ -89,7 +90,7 @@ export function PortalAppearanceSettings({
               <ThemePreview theme={item} />
               <span className="portal-theme-name">
                 <strong>{item.name}</strong>
-                {item.id === theme && <small>выбрана</small>}
+                {item.id === theme && <small>{t("portals.selected")}</small>}
               </span>
               <small className="portal-theme-desc">{item.description}</small>
             </button>
@@ -98,15 +99,15 @@ export function PortalAppearanceSettings({
             // Темы больше нет в сборке: показываем как есть, чтобы сохранение
             // не подменило её молча.
             <span className="portal-theme-card is-missing">
-              <span className="portal-theme-name"><strong>{theme}</strong><small>недоступна</small></span>
-              <small className="portal-theme-desc">Темы нет в этой сборке установки. Выберите другую, чтобы сохранить оформление.</small>
+              <span className="portal-theme-name"><strong>{theme}</strong><small>{t("portals.unavailable")}</small></span>
+              <small className="portal-theme-desc">{t("portals.theme_not_installation_build_pick")}</small>
             </span>
           )}
         </div>
       </div>
 
       <div>
-        <span className="portal-field-label">Цветовая схема</span>
+        <span className="portal-field-label">{t("portals.colour_scheme")}</span>
         <Segmented
           className="portal-scheme-segment"
           items={schemes}
@@ -116,12 +117,11 @@ export function PortalAppearanceSettings({
       </div>
 
       <div className="portal-settings-actions">
-        {canManage && <Button variant="primary" disabled={busy} onClick={() => void save()}>Сохранить оформление</Button>}
+        {canManage && <Button variant="primary" disabled={busy} onClick={() => void save()}>{t("portals.save_appearance")}</Button>}
         <a className="secondary-button" href={portal.publicUrl} rel="noreferrer" target="_blank">
-          <Icon name="eye" size={15} strokeWidth={1.9} />Предпросмотр портала
-        </a>
+          <Icon name="eye" size={15} strokeWidth={1.9} />{t("portals.portal_preview")}</a>
         <span className="portal-settings-gap" />
-        {savedAt && <span className="portal-settings-note">сохранено {shortDateTime(savedAt)}</span>}
+        {savedAt && <span className="portal-settings-note">{t("portals.saved_at_lower", { date: shortDateTime(savedAt) })}</span>}
       </div>
       {feedback && <div className="portal-form-error">{feedback}</div>}
     </div>
diff --git a/apps/internal-ui/src/features/support-portals/PortalArticleEditor.tsx b/apps/internal-ui/src/features/support-portals/PortalArticleEditor.tsx
index 5ec17a2..7377fdd 100644
--- a/apps/internal-ui/src/features/support-portals/PortalArticleEditor.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalArticleEditor.tsx
@@ -29,6 +29,7 @@ import {
 } from "../../shared/markdown/markdownTools";
 import { MARKDOWN_TOOLS } from "./markdownTools";
 import { LOCALE_OPTIONS } from "./portalText";
+import { fmt, t } from "../../i18n";
 
 // Редактор статьи (дизайн-базлайн v2, кадры PT7/PT8): полноэкранный split —
 // слева текст с панелью Markdown, в центре живой предпросмотр в теме портала,
@@ -39,9 +40,9 @@ type Mode = "edit" | "split" | "view";
 type UploadingFile = { name: string; percent: number };
 
 const MODES: Array<[Mode, string, "edit" | "split" | "eye", string]> = [
-  ["edit", "Текст", "edit", "Только редактор"],
-  ["split", "Вместе", "split", "Текст и предпросмотр"],
-  ["view", "Просмотр", "eye", "Только предпросмотр"],
+  ["edit", t("ai.text"), "edit", t("ai.editor_only")],
+  ["split", t("ai.side_by_side"), "split", t("ai.text_preview")],
+  ["view", t("ai.preview"), "eye", t("ai.preview_only")],
 ];
 
 function draftKey(portalId: number, articleId: number | null): string {
@@ -111,7 +112,7 @@ export function PortalArticleEditor({
           content: revision?.content ?? "",
         });
       })
-      .catch((caught) => setError(portalErrorMessage(caught, "Не удалось загрузить статью")))
+      .catch((caught) => setError(portalErrorMessage(caught, t("portals.could_not_load_article"))))
       .finally(() => setBusy(false));
   }, [article, portalId]);
 
@@ -169,7 +170,7 @@ export function PortalArticleEditor({
 
   const upload = useCallback(async (list: FileList | File[], insert: boolean) => {
     if (!loaded) {
-      setError("Сначала создайте статью — файлы прикрепляются к существующей статье");
+      setError(t("portals.create_article_first_files_attach"));
       return;
     }
     setError("");
@@ -186,7 +187,7 @@ export function PortalArticleEditor({
           insertText(`\n${fileMarkdown(payload.file.name, payload.file.path, true)}\n`);
         }
       } catch (caught) {
-        setError(portalErrorMessage(caught, `Не удалось загрузить ${file.name}`));
+        setError(portalErrorMessage(caught, t("portals.could_not_upload_file", { name: file.name })));
       } finally {
         setUploading(null);
       }
@@ -199,7 +200,7 @@ export function PortalArticleEditor({
       if (loaded) await deleteArticleFile(portalId, loaded.id, file.id);
       setFiles((current) => current.filter((item) => item.id !== file.id));
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось удалить файл"));
+      setError(portalErrorMessage(caught, t("portals.could_not_delete_file")));
     }
   }
 
@@ -257,7 +258,7 @@ export function PortalArticleEditor({
         return createdRevisionId === null ? null : { article: created.article, revisionId: createdRevisionId };
       }
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось сохранить статью"));
+      setError(portalErrorMessage(caught, t("portals.could_not_save_article")));
       return null;
     } finally {
       setBusy(false);
@@ -293,27 +294,24 @@ export function PortalArticleEditor({
   const dirty = baseline !== null
     && (baseline.title !== title || baseline.summary !== summary || baseline.content !== content);
   const badge = loaded === null
-    ? { tone: "draft", text: "Новая статья · не сохранена" }
+    ? { tone: "draft", text: t("portals.new_article_not_saved") }
     : dirty
-      ? { tone: "draft", text: "Есть несохранённые правки — их ещё нет на портале" }
+      ? { tone: "draft", text: t("portals.there_unsaved_edits_they_not") }
       : draftPending
-        ? { tone: "draft", text: `Редакция ${latestRevision!.revision} · черновик` }
-        : { tone: "live", text: `Редакция ${loaded.publishedRevision?.revision ?? "—"} · опубликована` };
+        ? { tone: "draft", text: t("portals.revision_draft", { revision: latestRevision!.revision }) }
+        : { tone: "live", text: t("portals.revision_published", { revision: loaded.publishedRevision?.revision ?? "—" }) };
 
   return (
     <div className="portal-editor">
       <div className="portal-editor-head">
         <button className="portal-editor-back" type="button" onClick={onClose}>
-          <Icon name="chevronLeft" size={16} strokeWidth={2} />Материалы
-        </button>
+          <Icon name="chevronLeft" size={16} strokeWidth={2} />{t("portals.material")}</button>
         <span className="portal-editor-crumb">{category?.name ?? ""}</span>
         <span className="portal-editor-gap" />
         <span className={`portal-editor-badge is-${badge.tone}`}><i />{badge.text}</span>
         <Segmented className="portal-editor-modes" items={MODES} value={mode} setValue={setMode} />
         {canManage && (
-          <Button variant="secondary" className="portal-editor-save" disabled={busy || !ready} onClick={() => void save()}>
-            Сохранить черновик
-          </Button>
+          <Button variant="secondary" className="portal-editor-save" disabled={busy || !ready} onClick={() => void save()}>{t("portals.save_draft")}</Button>
         )}
         {canManage && (
           <Button
@@ -322,9 +320,7 @@ export function PortalArticleEditor({
             icon="check"
             disabled={busy || !ready}
             onClick={() => void publish()}
-          >
-            Опубликовать
-          </Button>
+          >{t("common.publish")}</Button>
         )}
       </div>
 
@@ -335,12 +331,12 @@ export function PortalArticleEditor({
           <div className="portal-editor-column">
             <div className="portal-editor-title">
               <input
-                placeholder="Заголовок статьи"
+                placeholder={t("portals.article_title")}
                 value={title}
                 onChange={(event) => setTitle(event.target.value)}
               />
               <div className="portal-editor-slug">
-                <span>Адрес:</span>
+                <span>{t("portals.address")}</span>
                 {editingSlug
                   ? <input
                       autoFocus
@@ -349,7 +345,7 @@ export function PortalArticleEditor({
                       onChange={(event) => setSlug(event.target.value.toLocaleLowerCase())}
                     />
                   : <code>/articles/{slug}</code>}
-                {!editingSlug && <button type="button" onClick={() => setEditingSlug(true)}>изменить</button>}
+                {!editingSlug && <button type="button" onClick={() => setEditingSlug(true)}>{t("portals.change")}</button>}
               </div>
             </div>
 
@@ -410,8 +406,8 @@ export function PortalArticleEditor({
               {dropping && (
                 <div className="portal-editor-drop">
                   <Icon name="upload" size={30} strokeWidth={1.8} />
-                  <strong>Отпустите, чтобы добавить в статью</strong>
-                  <span>Изображение встанет в текст, остальные файлы прикрепятся вложением к статье. PNG, JPG, WebP, PDF, DOCX · до 25 МБ</span>
+                  <strong>{t("portals.drop_add_article")}</strong>
+                  <span>{t("portals.image_goes_into_text_other")}</span>
                 </div>
               )}
             </div>
@@ -420,7 +416,7 @@ export function PortalArticleEditor({
               <span>{editorStats(content)}</span>
               <span>{cursorPosition(content, caret)}</span>
               <span className="portal-editor-gap" />
-              {autoSavedAt && <span>Черновик сохранён автоматически в {autoSavedAt.toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" })}</span>}
+              {autoSavedAt && <span>{t("portals.draft_autosaved_at", { time: fmt.time(autoSavedAt) })}</span>}
             </div>
           </div>
         )}
@@ -428,18 +424,17 @@ export function PortalArticleEditor({
         {mode !== "edit" && (
           <div className="portal-preview-column">
             <div className="portal-preview-head">
-              <span>ПРЕДПРОСМОТР · ТЕМА ПОРТАЛА {theme.name.toLocaleUpperCase()}</span>
+              <span>{t("portals.preview_theme", { theme: theme.name.toLocaleUpperCase() })}</span>
               <span className="portal-editor-gap" />
-              <a href={portal.publicUrl} rel="noreferrer" target="_blank" title="Открыть как посетитель">
-                <Icon name="external" size={13} strokeWidth={1.9} />Как у посетителя
-              </a>
+              <a href={portal.publicUrl} rel="noreferrer" target="_blank" title={t("portals.open_as_visitor")}>
+                <Icon name="external" size={13} strokeWidth={1.9} />{t("portals.visitor_s_view")}</a>
             </div>
             <div className="portal-preview-body">
               <article className="portal-preview-article">
                 <div className="portal-preview-crumbs">
-                  <span>Помощь</span><span>/</span><span>{category?.name ?? ""}</span>
+                  <span>{t("portals.help")}</span><span>/</span><span>{category?.name ?? ""}</span>
                 </div>
-                <h1>{title || "Без заголовка"}</h1>
+                <h1>{title || t("ai.untitled")}</h1>
                 {summary && <p className="portal-preview-lead">{summary}</p>}
                 <MarkdownContent content={content} />
               </article>
@@ -450,7 +445,7 @@ export function PortalArticleEditor({
         <aside className="portal-editor-rail">
           <div className="portal-rail-fields">
             <label>
-              <span>Раздел</span>
+              <span>{t("admin.section")}</span>
               <span className="portal-select">
                 <select value={categoryId} onChange={(event) => setCategoryId(event.target.value)}>
                   {categories.map((item) => <option key={item.id} value={item.id}>{item.name}</option>)}
@@ -459,7 +454,7 @@ export function PortalArticleEditor({
               </span>
             </label>
             <label>
-              <span>Язык</span>
+              <span>{t("portals.language")}</span>
               <span className="portal-select">
                 <select value={locale} onChange={(event) => setLocale(event.target.value)}>
                   {LOCALE_OPTIONS.map(([value, label]) => <option key={value} value={value}>{label}</option>)}
@@ -468,15 +463,15 @@ export function PortalArticleEditor({
               </span>
             </label>
             <label>
-              <span>Краткое описание <small>· показывается в списке и поиске</small></span>
+              <span>{t("ai.short_description")}<small>{t("portals.shown_list_search")}</small></span>
               <textarea value={summary} onChange={(event) => setSummary(event.target.value)} />
             </label>
           </div>
 
           <div className="portal-rail-block">
             <div className="portal-rail-head">
-              <span>ФАЙЛЫ СТАТЬИ</span>
-              <button type="button" onClick={() => fileInputRef.current?.click()}>Загрузить</button>
+              <span>{t("portals.article_files")}</span>
+              <button type="button" onClick={() => fileInputRef.current?.click()}>{t("common.upload")}</button>
             </div>
             {/* Два механизма и два поля выбора: скрепка и рейка прикрепляют
                 файл к статье, кнопка «изображение» ставит картинку в текст. */}
@@ -513,8 +508,8 @@ export function PortalArticleEditor({
               }}
             >
               <Icon name="upload" size={20} strokeWidth={1.8} />
-              <p>Перетащите файлы</p>
-              <p>или <button type="button" onClick={() => fileInputRef.current?.click()}>выберите на диске</button> · до 25 МБ</p>
+              <p>{t("ai.drag_files_here")}</p>
+              <p>{t("ai.or")}<button type="button" onClick={() => fileInputRef.current?.click()}>{t("ai.pick_them_from_disk")}</button>{t("ai.up_25_mb")}</p>
             </div>
 
             <div className="portal-rail-files">
@@ -523,7 +518,7 @@ export function PortalArticleEditor({
                   <i><Icon name="image" size={14} strokeWidth={1.8} /></i>
                   <span>
                     <strong>{uploading.name}</strong>
-                    <small className="is-progress">загружаем… {uploading.percent} %</small>
+                    <small className="is-progress">{t("common.uploading_percent", { percent: uploading.percent })}</small>
                     <span className="portal-rail-progress"><i style={{ width: `${uploading.percent}%` }} /></span>
                   </span>
                 </div>
@@ -536,14 +531,14 @@ export function PortalArticleEditor({
                     <i><Icon name={image ? "image" : "file"} size={14} strokeWidth={1.8} /></i>
                     <span>
                       <strong>{file.name}</strong>
-                      <small>{fileMeta(file.name, file.size)}{inserted ? " · вставлен в текст" : " · вложение статьи"}</small>
+                      <small>{fileMeta(file.name, file.size)}{inserted ? ` ${t("portals.inserted_into_text")}` : ` ${t("portals.article_attachment")}`}</small>
                     </span>
                     {/* В текст вставляется только картинка: документ — вложение
                         статьи, посетитель скачивает его списком под текстом. */}
                     {image && !inserted && (
                       <button
                         className="portal-rail-file-insert"
-                        title="Вставить в текст"
+                        title={t("portals.insert_into_text")}
                         type="button"
                         onClick={() => insertText(`\n${fileMarkdown(file.name, file.path, true)}\n`)}
                       >
@@ -551,14 +546,14 @@ export function PortalArticleEditor({
                       </button>
                     )}
                     <button
-                      title="Копировать Markdown"
+                      title={t("ai.copy_as_markdown")}
                       type="button"
                       onClick={() => void navigator.clipboard?.writeText(fileMarkdown(file.name, file.path, image))}
                     >
                       <Icon name="copy" size={13} strokeWidth={1.9} />
                     </button>
                     {canManage && (
-                      <button className="portal-rail-file-remove" title="Удалить файл" type="button" onClick={() => void removeFile(file)}>
+                      <button className="portal-rail-file-remove" title={t("portals.delete_file")} type="button" onClick={() => void removeFile(file)}>
                         <Icon name="trash" size={13} strokeWidth={1.9} />
                       </button>
                     )}
@@ -571,18 +566,18 @@ export function PortalArticleEditor({
           {loaded && (
             <div className="portal-rail-block">
               <div className="portal-rail-head">
-                <span>ОЦЕНКИ ЧИТАТЕЛЕЙ</span>
+                <span>{t("portals.reader_ratings")}</span>
               </div>
               <div className="portal-rail-votes">
                 <span className="is-helpful">
                   <Icon name="check" size={13} strokeWidth={2.4} />
                   {loaded.feedback?.helpful ?? 0}
-                  <small>полезно</small>
+                  <small>{t("portals.helpful")}</small>
                 </span>
                 <span className="is-unhelpful">
                   <Icon name="close" size={13} strokeWidth={2.4} />
                   {loaded.feedback?.unhelpful ?? 0}
-                  <small>не помогло</small>
+                  <small>{t("portals.did_not_help")}</small>
                 </span>
               </div>
             </div>
@@ -590,8 +585,8 @@ export function PortalArticleEditor({
 
           <div className="portal-rail-block">
             <div className="portal-rail-head">
-              <span>ВЕРСИИ</span>
-              <span className="portal-rail-hint">неизменяемые</span>
+              <span>{t("portals.versions")}</span>
+              <span className="portal-rail-hint">{t("portals.immutable")}</span>
             </div>
             <div className="portal-rail-revisions">
               {revisions.map((revision) => {
@@ -605,16 +600,16 @@ export function PortalArticleEditor({
                   >
                     <i className={published ? "is-published" : revision.id === selectedRevisionId ? "is-draft" : ""} />
                     <span>
-                      <strong>Редакция {revision.revision}</strong>
-                      <small>{published ? "" : "черновик · "}{shortDateTime(revision.createdAt)}{revision.authorName ? ` · ${revision.authorName}` : ""}</small>
+                      <strong>{t("portals.revision_number", { revision: revision.revision })}</strong>
+                      <small>{published ? "" : t("portals.draft_prefix")}{shortDateTime(revision.createdAt)}{revision.authorName ? ` · ${revision.authorName}` : ""}</small>
                     </span>
-                    {revision.id === selectedRevisionId && !published && <small className="portal-rail-tag is-current">текущая</small>}
-                    {published && <small className="portal-rail-tag is-published">опубликована</small>}
+                    {revision.id === selectedRevisionId && !published && <small className="portal-rail-tag is-current">{t("profile.current")}</small>}
+                    {published && <small className="portal-rail-tag is-published">{t("portals.published_2")}</small>}
                   </button>
                 );
               })}
             </div>
-            <p>Публикация выбирает одну редакцию. Посетители видят только опубликованную.</p>
+            <p>{t("portals.publishing_picks_one_revision_visitors")}</p>
           </div>
         </aside>
       </div>
diff --git a/apps/internal-ui/src/features/support-portals/PortalArticleImportModal.tsx b/apps/internal-ui/src/features/support-portals/PortalArticleImportModal.tsx
index d887805..ec20993 100644
--- a/apps/internal-ui/src/features/support-portals/PortalArticleImportModal.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalArticleImportModal.tsx
@@ -7,6 +7,7 @@ import type { ArticleImportReport } from "./api";
 import { downloadArticleTemplate } from "./downloadArticleTemplate";
 import { importPortalArticles, portalErrorMessage } from "./model";
 import { parseArticleYaml, type ParsedArticleYaml } from "./parseArticleYaml";
+import { t } from "../../i18n";
 
 type PortalArticleImportModalProps = {
   portalId: number;
@@ -29,7 +30,7 @@ export function PortalArticleImportModal({ portalId, onClose, onImported }: Port
       setParsed(parseArticleYaml(await file.text()));
     } catch (caught) {
       setParsed(null);
-      setError(caught instanceof Error ? caught.message : "Не удалось прочитать файл");
+      setError(caught instanceof Error ? caught.message : t("ai.could_not_read_file"));
     }
   }
 
@@ -42,33 +43,29 @@ export function PortalArticleImportModal({ portalId, onClose, onImported }: Port
       setParsed(null);
       onImported();
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось импортировать статьи"));
+      setError(portalErrorMessage(caught, t("portals.could_not_import_articles")));
     } finally {
       setBusy(false);
     }
   }
 
   return (
-    <Modal open title="Импорт статей из YAML" onCancel={onClose} footer={null} destroyOnClose>
+    <Modal open title={t("portals.import_articles_from_yaml")} onCancel={onClose} footer={null} destroyOnClose>
       <div className="integration-form">
         <label className="knowledge-import-file">
           <span>
-            Файл YAML · формат: articles: [{"{"} slug, categoryPath, locale?, title, summary?, content {"}"}]
+            {t("portals.yaml_format_note", { format: "{ slug, categoryPath, locale?, title, summary?, content }" })}
             <button className="link has-icon" type="button" onClick={downloadArticleTemplate}>
-              <Icon name="download" size={14} />Скачать шаблон
-            </button>
+              <Icon name="download" size={14} />{t("portals.download_template")}</button>
           </span>
           <input type="file" accept=".yaml,.yml" onChange={(event) => void onFile(event)} />
         </label>
         {parsed && (
-          <div className="ai-doc-import-preview">
-            К импорту: <b>{parsed.articles.length}</b> статей. Совпадение по адресу создаст новую версию.
-          </div>
+          <div className="ai-doc-import-preview">{t("portals.import")}<b>{parsed.articles.length}</b>{t("portals.articles_match_address_creates_new")}</div>
         )}
         {result && (
           <div className="ai-doc-import-report">
-            <div className="ai-doc-import-summary">
-              Создано: <b>{result.created}</b> · Обновлено: <b>{result.updated}</b> · Без изменений: <b>{result.unchanged}</b>
+            <div className="ai-doc-import-summary">{t("ai.created")}<b>{result.created}</b>{t("ai.updated")}<b>{result.updated}</b>{t("ai.unchanged")}<b>{result.unchanged}</b>
             </div>
             {result.failed.length > 0 && (
               <ul className="ai-doc-import-failed">
@@ -81,9 +78,9 @@ export function PortalArticleImportModal({ portalId, onClose, onImported }: Port
         )}
         {error && <div className="ai-doc-error">{error}</div>}
         <div className="integration-form-actions">
-          <Button variant="secondary" disabled={busy} onClick={onClose}>Закрыть</Button>
+          <Button variant="secondary" disabled={busy} onClick={onClose}>{t("common.close")}</Button>
           <Button variant="primary" icon="download" disabled={!parsed || busy} onClick={submit}>
-            {busy ? "Импорт…" : "Импорт"}
+            {busy ? t("portals.importing") : t("portals.import_2")}
           </Button>
         </div>
       </div>
diff --git a/apps/internal-ui/src/features/support-portals/PortalBasicsSettings.tsx b/apps/internal-ui/src/features/support-portals/PortalBasicsSettings.tsx
index 408feb0..76a6612 100644
--- a/apps/internal-ui/src/features/support-portals/PortalBasicsSettings.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalBasicsSettings.tsx
@@ -10,6 +10,7 @@ import {
   type SupportPortal,
 } from "./model";
 import { LOCALE_OPTIONS } from "./portalText";
+import { t } from "../../i18n";
 
 // Кадр PT4: имя, ключ портала на этой установке и язык. Базовый домен —
 // из ответа API (`address.baseDomain`), в UI он никогда не зашивается.
@@ -48,10 +49,10 @@ export function PortalBasicsSettings({
     try {
       const payload = await updateSupportPortal(portal.id, { name, slug, defaultLocale: locale });
       onChanged(payload.portal);
-      setFeedback("Настройки сохранены");
+      setFeedback(t("portals.settings_saved"));
     } catch (caught) {
       setFieldErrors(portalFieldErrors(caught));
-      setFeedback(portalErrorMessage(caught, "Не удалось сохранить настройки"));
+      setFeedback(portalErrorMessage(caught, t("portals.could_not_save_settings")));
     } finally {
       setBusy(false);
     }
@@ -60,18 +61,18 @@ export function PortalBasicsSettings({
   return (
     <div className="portal-settings-card">
       <label className="portal-field">
-        <span className="portal-field-label">Название портала</span>
+        <span className="portal-field-label">{t("portals.portal_name")}</span>
         <input
           disabled={!canManage}
           value={name}
           onChange={(event) => setName(event.target.value)}
         />
-        <small>Показывается в шапке публичных страниц и в заголовке браузера.</small>
+        <small>{t("portals.shown_header_public_pages_browser")}</small>
         {fieldErrors.name && <small className="portal-field-error">{fieldErrors.name}</small>}
       </label>
 
       <div className="portal-field">
-        <span className="portal-field-label">Адрес на этой установке</span>
+        <span className="portal-field-label">{t("portals.address_installation")}</span>
         <span className="portal-key-input">
           <input
             disabled={!canManage}
@@ -81,39 +82,35 @@ export function PortalBasicsSettings({
           />
           <b>.{address.baseDomain}</b>
         </span>
-        <small>
-          Строчные латинские буквы, цифры и дефис. Базовый домен <b>{address.baseDomain}</b> задан
-          администратором при установке и одинаков для всех порталов этой инсталляции. Адрес входит
-          в ссылки на статьи — после смены старые ссылки перестанут работать.
+        <small>{t("portals.lowercase_latin_letters_digits_hyphens")}<b>{address.baseDomain}</b> {t("portals.base_domain_hint")}
         </small>
         {fieldErrors.slug && <small className="portal-field-error">{fieldErrors.slug}</small>}
       </div>
 
       <label className="portal-field is-narrow">
-        <span className="portal-field-label">Основной язык</span>
+        <span className="portal-field-label">{t("portals.primary_language")}</span>
         <span className="portal-select">
           <select disabled={!canManage} value={locale} onChange={(event) => setLocale(event.target.value)}>
             {LOCALE_OPTIONS.map(([value, label]) => <option key={value} value={value}>{label}</option>)}
           </select>
           <Icon name="chevron" size={14} strokeWidth={2} />
         </span>
-        <small>Язык, который подставляется новым статьям. Статьи на других языках остаются как есть.</small>
+        <small>{t("portals.language_filled_new_articles_articles")}</small>
       </label>
 
       <div className="portal-final-link">
         <span>
-          <small>Итоговая ссылка</small>
+          <small>{t("portals.resulting_link")}</small>
           <code>{finalUrl}</code>
         </span>
-        <CopyButton className="portal-inline-button" label="Копировать" value={finalUrl} />
+        <CopyButton className="portal-inline-button" label={t("common.copy")} value={finalUrl} />
         <a className="portal-inline-button is-accent" href={finalUrl} rel="noreferrer" target="_blank">
-          <Icon name="external" size={13} strokeWidth={2} />Открыть
-        </a>
+          <Icon name="external" size={13} strokeWidth={2} />{t("portals.open")}</a>
       </div>
 
       {canManage && (
         <div className="portal-settings-actions">
-          <Button variant="primary" disabled={busy} onClick={() => void save()}>Сохранить настройки</Button>
+          <Button variant="primary" disabled={busy} onClick={() => void save()}>{t("portals.save_settings")}</Button>
           {feedback && <span className="portal-settings-note">{feedback}</span>}
         </div>
       )}
diff --git a/apps/internal-ui/src/features/support-portals/PortalCategoryManagement.tsx b/apps/internal-ui/src/features/support-portals/PortalCategoryManagement.tsx
index 9a4d19c..72635bb 100644
--- a/apps/internal-ui/src/features/support-portals/PortalCategoryManagement.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalCategoryManagement.tsx
@@ -5,6 +5,7 @@ import {
   updatePortalCategory,
   type PortalCategory,
 } from "./model";
+import { t } from "../../i18n";
 
 export function PortalCategoryManagement({
   categories,
@@ -26,11 +27,11 @@ export function PortalCategoryManagement({
         sortOrder: item.sortOrder,
         count: item.articleCount,
       }))}
-      createLabel="Создать раздел"
-      deleteDescription="Раздел можно удалить только после переноса вложенных разделов и статей."
-      errorMessage="Не удалось изменить разделы"
-      subtitle="Раздел определяет расположение статей в публичном портале"
-      title="Управление разделами"
+      createLabel={t("portals.create_section")}
+      deleteDescription={t("portals.section_can_only_deleted_once")}
+      errorMessage={t("portals.could_not_change_sections")}
+      subtitle={t("portals.section_decides_where_articles_sit")}
+      title={t("portals.manage_sections")}
       onChanged={onChanged}
       onClose={onClose}
       onCreate={(input) => createPortalCategory(portalId, input)}
diff --git a/apps/internal-ui/src/features/support-portals/PortalCreateDialog.tsx b/apps/internal-ui/src/features/support-portals/PortalCreateDialog.tsx
index 9637224..67cb49b 100644
--- a/apps/internal-ui/src/features/support-portals/PortalCreateDialog.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalCreateDialog.tsx
@@ -10,6 +10,7 @@ import {
   type PortalAddressConfig,
   type SupportPortal,
 } from "./model";
+import { t } from "../../i18n";
 
 function configuredAddress(config: PortalAddressConfig, slug: string): string {
   const port = config.port ? `:${config.port}` : "";
@@ -23,10 +24,10 @@ function validPortalKey(value: string): boolean {
 function creationError(caught: unknown): string {
   if (caught instanceof ApiError) {
     if (caught.status === 400) {
-      return "Проверьте название и адрес портала.";
+      return t("portals.check_portal_name_address");
     }
   }
-  return "Не удалось создать портал. Повторите попытку позже.";
+  return t("portals.could_not_create_portal_try");
 }
 
 export function PortalCreateDialog({
@@ -68,12 +69,12 @@ export function PortalCreateDialog({
   }
 
   return (
-    <Modal open={open} title="Новый портал поддержки" footer={null} onCancel={onClose}>
+    <Modal open={open} title={t("portals.new_support_portal")} footer={null} onCancel={onClose}>
       <div className="portal-dialog-form">
-        <p>Портал — это публичный центр помощи с инструкциями и ответами для клиентов.</p>
-        <FormField error={fieldErrors.name} label="Название портала" value={name} onChange={setName} placeholder="Например, Центр помощи" wide />
+        <p>{t("portals.portal_public_help_centre_with")}</p>
+        <FormField error={fieldErrors.name} label={t("portals.portal_name")} value={name} onChange={setName} placeholder={t("portals.example_help_centre")} wide />
         <label className={`portal-address-field${fieldErrors.slug ? " is-invalid" : ""}`}>
-          <span>Адрес портала</span>
+          <span>{t("portals.portal_address")}</span>
           <div>
             <input
               type="text"
@@ -86,21 +87,21 @@ export function PortalCreateDialog({
             />
             <b>.{address.baseDomain}</b>
           </div>
-          <small>Используйте строчные латинские буквы, цифры и дефисы.</small>
+          <small>{t("portals.use_lowercase_latin_letters_digits")}</small>
           {fieldErrors.slug && <small className="form-field-error" role="alert">{fieldErrors.slug}</small>}
           {slug.trim() && <code>{configuredAddress(address, slug.trim())}</code>}
         </label>
         <SelectField
-          label="Основной язык"
+          label={t("portals.primary_language")}
           value={locale}
           onChange={setLocale}
-          options={[["ru", "Русский"], ["en", "English"]]}
+          options={[["ru", t("portals.russian")], ["en", "English"]]}
         />
         {error && <div className="portal-form-error">{error}</div>}
         <div className="portal-dialog-actions">
-          <Button variant="secondary" onClick={onClose}>Отмена</Button>
+          <Button variant="secondary" onClick={onClose}>{t("common.cancel")}</Button>
           <Button variant="primary" disabled={busy || !name.trim() || !portalKeyValid} onClick={() => void submit()}>
-            {busy ? "Создаём…" : "Создать портал"}
+            {busy ? t("portals.creating") : t("portals.create_portal")}
           </Button>
         </div>
       </div>
diff --git a/apps/internal-ui/src/features/support-portals/PortalDomainSettings.tsx b/apps/internal-ui/src/features/support-portals/PortalDomainSettings.tsx
index a330b22..25ce90e 100644
--- a/apps/internal-ui/src/features/support-portals/PortalDomainSettings.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalDomainSettings.tsx
@@ -10,6 +10,7 @@ import {
   type SupportPortal,
 } from "./model";
 import { hostedHost } from "./portalText";
+import { t } from "../../i18n";
 
 // Кадр PT5. Подтверждения владения доменом нет: продукт self-hosted, домен и
 // установка принадлежат одному владельцу. Остаётся одна A-запись на IP
@@ -47,12 +48,12 @@ export function PortalDomainSettings({
         : await verifyPortalCustomDomain(portal.id);
       onChanged(payload.portal);
       setFeedback(action === "verify"
-        ? "Домен ведёт сюда"
-        : domain.trim() ? "Домен сохранён. Добавьте A-запись и проверьте DNS." : "Свой домен отключён");
+        ? t("portals.domain_points_here")
+        : domain.trim() ? t("portals.domain_saved_add_record_check") : t("portals.custom_domain_off"));
     } catch (caught) {
       setFailure(portalErrorMessage(
         caught,
-        action === "verify" ? "Не удалось проверить домен" : "Не удалось сохранить домен",
+        action === "verify" ? t("portals.could_not_check_domain") : t("portals.could_not_save_domain"),
       ));
     } finally {
       setBusy(false);
@@ -67,9 +68,9 @@ export function PortalDomainSettings({
     try {
       const payload = await setPortalCustomDomain(portal.id, "");
       onChanged(payload.portal);
-      setFeedback("Свой домен отключён");
+      setFeedback(t("portals.custom_domain_off"));
     } catch (caught) {
-      setFailure(portalErrorMessage(caught, "Не удалось отключить домен"));
+      setFailure(portalErrorMessage(caught, t("portals.could_not_turn_domain_off")));
     } finally {
       setBusy(false);
     }
@@ -79,7 +80,7 @@ export function PortalDomainSettings({
     <div className="portal-settings-card">
       <div className="portal-domain-row">
         <label className="portal-field">
-          <span className="portal-field-label">Домен</span>
+          <span className="portal-field-label">{t("portals.domain")}</span>
           <input
             className="is-mono"
             disabled={!canManage}
@@ -92,8 +93,8 @@ export function PortalDomainSettings({
           <span className={`portal-domain-state${verifiedAt ? " is-live" : " is-pending"}`}>
             <Icon name={verifiedAt ? "check" : "clock"} size={14} strokeWidth={2.4} />
             {verifiedAt
-              ? `Домен ведёт сюда · проверено ${shortDate(verifiedAt)}`
-              : "Домен ещё не проверялся"}
+              ? t("portals.domain_points_here_checked", { date: shortDate(verifiedAt) })
+              : t("portals.domain_has_not_been_checked")}
           </span>
         )}
       </div>
@@ -101,45 +102,44 @@ export function PortalDomainSettings({
       {portal.customDomain && (
         <div>
           <div className="portal-dns-head">
-            <strong>Запись у регистратора домена</strong>
-            <span>обновление DNS занимает до 24 часов</span>
+            <strong>{t("portals.record_at_domain_registrar")}</strong>
+            <span>{t("portals.dns_update_takes_up_24")}</span>
           </div>
           <table className="portal-dns-table">
             <thead>
-              <tr><th>ТИП</th><th>ИМЯ</th><th>ЗНАЧЕНИЕ</th><th /></tr>
+              <tr><th>{t("portals.type")}</th><th>{t("portals.name")}</th><th>{t("portals.value")}</th><th /></tr>
             </thead>
             <tbody>
               {record ? (
                 <tr>
                   <td className="portal-dns-type">{record.type}</td>
                   <td><code>{record.name}</code></td>
-                  <td><code>{record.value} · IP этой установки</code></td>
+                  <td><code>{t("portals.ip_of_installation", { value: record.value })}</code></td>
                   <td><CopyButton className="portal-dns-copy" label="" value={record.value} /></td>
                 </tr>
               ) : (
                 <tr>
                   <td className="portal-dns-type">A</td>
                   <td><code>{portal.customDomain}</code></td>
-                  <td><code>IP этой установки не задан администратором</code></td>
+                  <td><code>{t("portals.administrator_has_not_set_installation")}</code></td>
                   <td />
                 </tr>
               )}
             </tbody>
           </table>
           <p className="portal-dns-note">
-            Больше ничего добавлять не нужно: домен ваш, установка ваша — проверка лишь смотрит,
-            ведёт ли запись на этот сервер, и выписывает сертификат.
+            {t("portals.domain_no_extra_setup")}
           </p>
         </div>
       )}
 
       {canManage && (
         <div className="portal-settings-actions">
-          <Button variant="primary" disabled={busy} onClick={() => void run("save")}>Сохранить домен</Button>
-          <Button variant="secondary" disabled={busy || !portal.customDomain} onClick={() => void run("verify")}>Проверить DNS</Button>
+          <Button variant="primary" disabled={busy} onClick={() => void run("save")}>{t("portals.save_domain")}</Button>
+          <Button variant="secondary" disabled={busy || !portal.customDomain} onClick={() => void run("verify")}>{t("portals.check_dns")}</Button>
           <span className="portal-settings-gap" />
           {portal.customDomain && (
-            <Button variant="danger-outline" disabled={busy} onClick={() => void disconnect()}>Отключить домен</Button>
+            <Button variant="danger-outline" disabled={busy} onClick={() => void disconnect()}>{t("portals.turn_domain_off")}</Button>
           )}
         </div>
       )}
diff --git a/apps/internal-ui/src/features/support-portals/PortalHeader.tsx b/apps/internal-ui/src/features/support-portals/PortalHeader.tsx
index 554dfc4..c6ecde7 100644
--- a/apps/internal-ui/src/features/support-portals/PortalHeader.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalHeader.tsx
@@ -5,6 +5,7 @@ import { StatusPill } from "../../shared/ui";
 import { Button, CopyButton } from "../../shared/ui-controls";
 import { PORTAL_STATUS_LABEL, type PortalStatus, type SupportPortal } from "./model";
 import { contentSummary, hostedHost, localeName, publicHost } from "./portalText";
+import { t } from "../../i18n";
 
 // Шапка карточки портала (дизайн-базлайн v2, кадр PT3): публичный адрес —
 // постоянный элемент, а не текст в подзаголовке: копирование, открытие,
@@ -41,20 +42,20 @@ export function PortalHeader({
   const menuItems = [
     ...(canManage && portal.status === "DRAFT" ? [{
       key: "publish",
-      label: <button type="button" onClick={() => onChangeStatus("PUBLISHED")}><Icon name="check" size={15} strokeWidth={2.2} />Опубликовать портал</button>,
+      label: <button type="button" onClick={() => onChangeStatus("PUBLISHED")}><Icon name="check" size={15} strokeWidth={2.2} />{t("portals.publish_portal")}</button>,
     }] : []),
     ...(canManage && portal.status === "PUBLISHED" ? [{
       key: "unpublish",
-      label: <button type="button" onClick={() => onChangeStatus("DRAFT")}><Icon name="undo" size={15} strokeWidth={1.9} />Снять с публикации</button>,
+      label: <button type="button" onClick={() => onChangeStatus("DRAFT")}><Icon name="undo" size={15} strokeWidth={1.9} />{t("portals.unpublish")}</button>,
     }] : []),
     ...(canManage && archived ? [{
       key: "restore",
-      label: <button type="button" onClick={() => onChangeStatus("DRAFT")}><Icon name="undo" size={15} strokeWidth={1.9} />Вернуть из архива</button>,
+      label: <button type="button" onClick={() => onChangeStatus("DRAFT")}><Icon name="undo" size={15} strokeWidth={1.9} />{t("portals.restore_from_archive")}</button>,
     }] : []),
-    { key: "open", label: <button type="button" onClick={() => window.open(portal.publicUrl, "_blank", "noreferrer")}><Icon name="external" size={15} strokeWidth={1.9} />Открыть портал</button> },
+    { key: "open", label: <button type="button" onClick={() => window.open(portal.publicUrl, "_blank", "noreferrer")}><Icon name="external" size={15} strokeWidth={1.9} />{t("portals.open_portal")}</button> },
     ...(canManage && !archived ? [
       { key: "divider", type: "divider" as const },
-      { key: "archive", label: <button className="danger" type="button" onClick={() => onChangeStatus("ARCHIVED")}><Icon name="trash" size={15} strokeWidth={1.9} />Перенести в архив</button> },
+      { key: "archive", label: <button className="danger" type="button" onClick={() => onChangeStatus("ARCHIVED")}><Icon name="trash" size={15} strokeWidth={1.9} />{t("common.move_archive")}</button> },
     ] : []),
   ];
 
@@ -62,10 +63,10 @@ export function PortalHeader({
     <div className="portal-card-head">
       <div className="portal-card-head-inner">
         <nav className="portal-breadcrumbs">
-          <button className="link is-strong" type="button" onClick={onOpenPortals}>Порталы</button>
+          <button className="link is-strong" type="button" onClick={onOpenPortals}>{t("common.portals")}</button>
           <span>/</span>
           {settingsActive
-            ? <><button className="link is-muted" type="button" onClick={onOpenContent}>{portal.name}</button><span>/</span><b>Настройки</b></>
+            ? <><button className="link is-muted" type="button" onClick={onOpenContent}>{portal.name}</button><span>/</span><b>{t("common.settings")}</b></>
             : <span>{portal.name}</span>}
         </nav>
 
@@ -83,7 +84,7 @@ export function PortalHeader({
                 <code>{publicHost(portal)}</code>
                 {ownDomain && (
                   <span className={`portal-domain-tag${domainLive ? "" : " is-pending"}`}>
-                    свой домен · {domainLive ? "работает" : "не проверен"}
+                    {t("portals.custom_domain_state", { state: domainLive ? t("portals.working") : t("portals.not_checked") })}
                   </span>
                 )}
                 <CopyButton className="portal-address-copy" label="" value={portal.publicUrl} />
@@ -92,14 +93,13 @@ export function PortalHeader({
                   href={portal.publicUrl}
                   rel="noreferrer"
                   target="_blank"
-                  title="Открыть портал в новой вкладке"
+                  title={t("portals.open_portal_new_tab")}
                 >
                   <Icon name="external" size={14} strokeWidth={2} />
                 </a>
               </span>
               {ownDomain && (
-                <span className="portal-hosted-note">
-                  адрес на этой установке <code>{hostedHost(portal)}</code>
+                <span className="portal-hosted-note">{t("portals.address_installation_2")}<code>{hostedHost(portal)}</code>
                 </span>
               )}
             </div>
@@ -111,15 +111,12 @@ export function PortalHeader({
               type="button"
               onClick={onOpenSettings}
             >
-              <Icon name="settings" size={15} strokeWidth={1.9} />Настройки
-            </button>
+              <Icon name="settings" size={15} strokeWidth={1.9} />{t("common.settings")}</button>
             {canManage && !archived && (
-              <Button variant="primary" className="portal-primary-action" icon="plus" onClick={onCreateArticle}>
-                Новая статья
-              </Button>
+              <Button variant="primary" className="portal-primary-action" icon="plus" onClick={onCreateArticle}>{t("portals.new_article")}</Button>
             )}
             <Dropdown menu={{ items: menuItems }} overlayClassName="app-dropdown is-portal-menu" placement="bottomRight" trigger={["click"]}>
-              <button aria-label="Ещё" className="portal-more-button" title="Ещё" type="button">
+              <button aria-label={t("common.more")} className="portal-more-button" title={t("common.more")} type="button">
                 <Icon name="more" size={16} strokeWidth={2} />
               </button>
             </Dropdown>
diff --git a/apps/internal-ui/src/features/support-portals/PortalLibrary.tsx b/apps/internal-ui/src/features/support-portals/PortalLibrary.tsx
index 0ebb45a..44192a0 100644
--- a/apps/internal-ui/src/features/support-portals/PortalLibrary.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalLibrary.tsx
@@ -10,7 +10,6 @@ import { DecisionDialog } from "../../shared/DecisionDialog";
 import { Icon } from "../../shared/icons";
 import { StatusPill } from "../../shared/ui";
 import { Button, FilterDropdown, SearchInput } from "../../shared/ui-controls";
-import { pluralRu } from "../../shared/utils";
 import { agentLinkOptions } from "../ai/agentOptions";
 import { linkPortalArticlesToAgent } from "../ai/knowledge/model";
 import { Pagination } from "../../shared/Pagination";
@@ -29,11 +28,11 @@ import {
 import { PortalArticleImportModal } from "./PortalArticleImportModal";
 import { PortalCategoryManagement } from "./PortalCategoryManagement";
 import { LOCALE_OPTIONS, revisionSummary, updatedAt } from "./portalText";
+import { t, tn } from "../../i18n";
 
 // Библиотека материалов портала (дизайн-базлайн v2, кадр PT3): дерево разделов
 // 260px с вложенностью и счётчиками, тулбар и таблица статей — без вкладок.
 
-const ARTICLE_FORMS: [string, string, string] = ["статья", "статьи", "статей"];
 
 const STATUS_FILTER = [
   { value: "PUBLISHED", label: ARTICLE_STATUS_LABEL.PUBLISHED },
@@ -118,7 +117,7 @@ export function PortalLibrary({
     (page: number) => listPortalArticles(portalId, request, page),
     [portalId, request],
   );
-  const articles = usePagedResource(loadArticles, request, "Не удалось загрузить статьи");
+  const articles = usePagedResource(loadArticles, request, t("portals.could_not_load_articles"));
   const reloadAll = useCallback(async () => {
     await Promise.all([reload(), articles.reload()]);
   }, [articles, reload]);
@@ -131,7 +130,7 @@ export function PortalLibrary({
       const result = await linkPortalArticlesToAgent({ agentId, action, articleIds: [linking.id] });
       setLinkOutcome({ action, changed: result.changed, skipped: result.skippedIds.length });
     } catch (caught) {
-      setLinkError(portalErrorMessage(caught, "Не удалось изменить статьи агента"));
+      setLinkError(portalErrorMessage(caught, t("portals.could_not_change_agent_s")));
     } finally {
       setBusy(false);
     }
@@ -146,7 +145,7 @@ export function PortalLibrary({
       setArchiving(null);
       await reloadAll();
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось изменить статью"));
+      setError(portalErrorMessage(caught, t("portals.could_not_change_article")));
       setArchiving(null);
     } finally {
       setBusy(false);
@@ -157,8 +156,8 @@ export function PortalLibrary({
     <div className="portal-library">
       <aside className="portal-sections">
         <header>
-          <span>РАЗДЕЛЫ</span>
-          {canManage && <button type="button" onClick={() => setManagingCategories(true)}>Управлять</button>}
+          <span>{t("portals.sections")}</span>
+          {canManage && <button type="button" onClick={() => setManagingCategories(true)}>{t("ai.manage")}</button>}
         </header>
         <nav>
           <button
@@ -168,7 +167,7 @@ export function PortalLibrary({
             onClick={() => { setSelectedCategory(undefined); }}
           >
             <Icon name="folder" size={15} strokeWidth={1.8} />
-            <span>Все материалы</span>
+            <span>{t("portals.all_material")}</span>
             <small>{total}</small>
           </button>
           {rows.map(({ category, depth, count }) => (
@@ -187,8 +186,7 @@ export function PortalLibrary({
         {canManage && (
           <div className="portal-sections-foot">
             <button type="button" onClick={() => setManagingCategories(true)}>
-              <Icon name="plus" size={14} strokeWidth={2} />Добавить раздел
-            </button>
+              <Icon name="plus" size={14} strokeWidth={2} />{t("portals.add_section")}</button>
           </div>
         )}
       </aside>
@@ -198,13 +196,13 @@ export function PortalLibrary({
           <div className="portal-library-toolbar">
             <SearchInput
               className="portal-library-search"
-              placeholder="Поиск по статьям"
+              placeholder={t("portals.search_articles")}
               value={query}
               onChange={setQuery}
             />
             <FilterDropdown
-              caption="Язык:"
-              label={language.length === 1 ? LOCALE_OPTIONS.find(([value]) => value === language[0])![1] : "Все"}
+              caption={t("portals.language_2")}
+              label={language.length === 1 ? LOCALE_OPTIONS.find(([value]) => value === language[0])![1] : t("common.all")}
               multiple
               open={languageOpen}
               options={LOCALE_OPTIONS.map(([value, label]) => ({ value, label }))}
@@ -217,8 +215,8 @@ export function PortalLibrary({
               }}
             />
             <FilterDropdown
-              caption="Статус:"
-              label={status.length === 1 ? STATUS_FILTER.find((item) => item.value === status[0])!.label : "Все"}
+              caption={t("portals.status")}
+              label={status.length === 1 ? STATUS_FILTER.find((item) => item.value === status[0])!.label : t("common.all")}
               multiple
               open={statusOpen}
               options={STATUS_FILTER}
@@ -232,9 +230,7 @@ export function PortalLibrary({
             />
             <span className="portal-library-toolbar-gap" />
             {canManage && (
-              <Button variant="secondary" className="portal-import-button" icon="import" onClick={() => setImportOpen(true)}>
-                Импорт статей
-              </Button>
+              <Button variant="secondary" className="portal-import-button" icon="import" onClick={() => setImportOpen(true)}>{t("portals.article_import")}</Button>
             )}
           </div>
 
@@ -243,13 +239,13 @@ export function PortalLibrary({
           <table className="portal-articles-table">
             <thead>
               <tr>
-                <th>СТАТЬЯ</th>
-                <th>РАЗДЕЛ</th>
-                <th>ЯЗЫК</th>
-                <th>РЕДАКЦИЯ</th>
-                <th>ОЦЕНКИ</th>
-                <th>СТАТУС</th>
-                <th>ОБНОВЛЕНО</th>
+                <th>{t("portals.article")}</th>
+                <th>{t("portals.section")}</th>
+                <th>{t("portals.language_3")}</th>
+                <th>{t("portals.revision")}</th>
+                <th>{t("portals.ratings")}</th>
+                <th>{t("common.status_2")}</th>
+                <th>{t("ai.updated_2")}</th>
                 <th />
               </tr>
             </thead>
@@ -261,14 +257,14 @@ export function PortalLibrary({
                 const unhelpful = article.feedback?.unhelpful ?? 0;
                 const votes = { helpful, unhelpful, total: helpful + unhelpful };
                 const menuItems = [
-                  { key: "edit", label: <button type="button" onClick={() => onEditArticle(article)}><Icon name="edit" size={15} strokeWidth={1.9} />Изменить</button> },
+                  { key: "edit", label: <button type="button" onClick={() => onEditArticle(article)}><Icon name="edit" size={15} strokeWidth={1.9} />{t("common.edit")}</button> },
                   ...(canLinkAgents ? [{
                     key: "agent",
-                    label: <button type="button" onClick={() => { setLinking(article); setLinkOutcome(null); setLinkError(null); }}><Icon name="robot" size={15} strokeWidth={1.9} />Прикрепить к агенту</button>,
+                    label: <button type="button" onClick={() => { setLinking(article); setLinkOutcome(null); setLinkError(null); }}><Icon name="robot" size={15} strokeWidth={1.9} />{t("ai.attach_agent")}</button>,
                   }] : []),
                   ...(canManage && article.status !== "ARCHIVED" ? [
                     { key: "divider", type: "divider" as const },
-                    { key: "archive", label: <button className="danger" type="button" onClick={() => setArchiving(article)}><Icon name="trash" size={15} strokeWidth={1.9} />В архив</button> },
+                    { key: "archive", label: <button className="danger" type="button" onClick={() => setArchiving(article)}><Icon name="trash" size={15} strokeWidth={1.9} />{t("common.archive")}</button> },
                   ] : []),
                 ];
                 return (
@@ -285,7 +281,7 @@ export function PortalLibrary({
                           <small>/{article.slug}</small>
                         </span>
                         {article.fileCount > 0 && (
-                          <small className="portal-article-files" title="Файлы в статье">
+                          <small className="portal-article-files" title={t("portals.files_article")}>
                             <Icon name="attach" size={12} strokeWidth={1.9} />{article.fileCount}
                           </small>
                         )}
@@ -299,9 +295,9 @@ export function PortalLibrary({
                     </td>
                     <td className="portal-article-votes">
                       {votes.total === 0 ? (
-                        <span className="portal-votes-empty" title="Читатели ещё не оценивали">—</span>
+                        <span className="portal-votes-empty" title={t("portals.no_reader_ratings_yet")}>—</span>
                       ) : (
-                        <span className="portal-votes" title={`Полезно ${votes.helpful} · не помогло ${votes.unhelpful}`}>
+                        <span className="portal-votes" title={t("portals.votes_summary", { helpful: votes.helpful, unhelpful: votes.unhelpful })}>
                           <b className="is-up"><Icon name="thumbUp" size={13} strokeWidth={1.9} />{votes.helpful}</b>
                           <b className="is-down"><Icon name="thumbDown" size={13} strokeWidth={1.9} />{votes.unhelpful}</b>
                         </span>
@@ -311,7 +307,7 @@ export function PortalLibrary({
                     <td className="portal-article-updated">{updatedAt(article.updatedAt)}</td>
                     <td className="row-actions" onClick={(event) => event.stopPropagation()}>
                       <Dropdown menu={{ items: menuItems }} overlayClassName="app-dropdown is-portal-menu" placement="bottomRight" trigger={["click"]}>
-                        <button aria-label={`Действия: ${title}`} className="row-menu-button" type="button"><Icon name="more" size={16} strokeWidth={2} /></button>
+                        <button aria-label={t("common.actions_for", { name: title })} className="row-menu-button" type="button"><Icon name="more" size={16} strokeWidth={2} /></button>
                       </Dropdown>
                     </td>
                   </tr>
@@ -321,7 +317,7 @@ export function PortalLibrary({
           </table>
 
           <Pagination
-            note={`${pluralRu(articles.total, ARTICLE_FORMS)} · показаны ${articles.items.length} · агент отвечает только по опубликованным`}
+            note={t("portals.library_note", { count: tn("plural.articles", articles.total), shown: articles.items.length })}
             page={articles.page}
             pageCount={articles.pageCount}
             onPage={articles.setPage}
@@ -334,9 +330,9 @@ export function PortalLibrary({
           agents={agentLinkOptions(agents)}
           busy={busy}
           error={linkError}
-          forms={ARTICLE_FORMS}
+          countKey="plural.articles"
           outcome={linkOutcome}
-          title="Статьи агента поддержки"
+          title={t("portals.support_agent_articles")}
           onCancel={() => setLinking(null)}
           onSubmit={(agentId, action) => void submitAgentLink(agentId, action)}
         />
@@ -361,11 +357,11 @@ export function PortalLibrary({
         onClose={() => setArchiving(null)}
         tone="danger"
         icon="trash"
-        title="Перенести статью в архив?"
-        description="Статья исчезнет с публичного портала."
+        title={t("portals.move_article_archive")}
+        description={t("portals.article_will_disappear_from_public")}
         actions={<>
-          <Button variant="secondary" onClick={() => setArchiving(null)}>Отмена</Button>
-          <Button variant="danger-outline" disabled={busy} onClick={() => void archive()}>В архив</Button>
+          <Button variant="secondary" onClick={() => setArchiving(null)}>{t("common.cancel")}</Button>
+          <Button variant="danger-outline" disabled={busy} onClick={() => void archive()}>{t("common.archive")}</Button>
         </>}
       />
     </div>
diff --git a/apps/internal-ui/src/features/support-portals/PortalPublishSettings.tsx b/apps/internal-ui/src/features/support-portals/PortalPublishSettings.tsx
index 71eb5aa..8e92826 100644
--- a/apps/internal-ui/src/features/support-portals/PortalPublishSettings.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalPublishSettings.tsx
@@ -11,22 +11,23 @@ import {
   type PortalStatus,
   type SupportPortal,
 } from "./model";
+import { t } from "../../i18n";
 
 // Раздел «Публикация и архив» субменю настроек (кадры PT4–PT6): здесь живут
 // действия, которые в шапке карточки спрятаны в ⋯.
 
 const COPY: Record<Exclude<PortalStatus, "ARCHIVED"> | "ARCHIVED", { title: string; description: string }> = {
   PUBLISHED: {
-    title: "Опубликовать портал?",
-    description: "Опубликованные статьи станут доступны по публичному адресу.",
+    title: t("portals.publish_portal_2"),
+    description: t("portals.published_articles_will_become_available"),
   },
   DRAFT: {
-    title: "Снять портал с публикации?",
-    description: "Посетители перестанут видеть материалы, адрес останется за порталом.",
+    title: t("portals.unpublish_portal"),
+    description: t("portals.visitors_will_stop_seeing_material"),
   },
   ARCHIVED: {
-    title: "Перенести портал в архив?",
-    description: "Портал и его материалы станут недоступны посетителям до восстановления.",
+    title: t("portals.move_portal_archive"),
+    description: t("portals.portal_its_material_become_unavailable"),
   },
 };
 
@@ -51,7 +52,7 @@ export function PortalPublishSettings({
       onChanged(payload.portal);
       setPending(null);
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось изменить статус портала"));
+      setError(portalErrorMessage(caught, t("portals.could_not_change_portal_status")));
       setPending(null);
     } finally {
       setBusy(false);
@@ -63,27 +64,26 @@ export function PortalPublishSettings({
     <div className="portal-settings-card">
       <div className="portal-status-row">
         <span>
-          <small>Текущее состояние</small>
+          <small>{t("portals.current_state")}</small>
           <StatusPill
             status={portal.status === "PUBLISHED" ? "published" : archived ? "archived" : "draft"}
             label={PORTAL_STATUS_LABEL[portal.status]}
           />
         </span>
-        {portal.publishedAt && <span className="portal-settings-note">опубликован {shortDateTime(portal.publishedAt)}</span>}
+        {portal.publishedAt && <span className="portal-settings-note">{t("portals.published_at_lower", { date: shortDateTime(portal.publishedAt) })}</span>}
       </div>
 
       {canManage && (
         <div className="portal-settings-actions">
-          {portal.status === "DRAFT" && <Button variant="primary" disabled={busy} onClick={() => setPending("PUBLISHED")}>Опубликовать портал</Button>}
-          {portal.status === "PUBLISHED" && <Button variant="secondary" disabled={busy} onClick={() => setPending("DRAFT")}>Снять с публикации</Button>}
-          {archived && <Button variant="secondary" disabled={busy} onClick={() => void apply("DRAFT")}>Вернуть из архива</Button>}
+          {portal.status === "DRAFT" && <Button variant="primary" disabled={busy} onClick={() => setPending("PUBLISHED")}>{t("portals.publish_portal")}</Button>}
+          {portal.status === "PUBLISHED" && <Button variant="secondary" disabled={busy} onClick={() => setPending("DRAFT")}>{t("portals.unpublish")}</Button>}
+          {archived && <Button variant="secondary" disabled={busy} onClick={() => void apply("DRAFT")}>{t("portals.restore_from_archive")}</Button>}
           <span className="portal-settings-gap" />
-          {!archived && <Button variant="danger-outline" disabled={busy} onClick={() => setPending("ARCHIVED")}>Перенести в архив</Button>}
+          {!archived && <Button variant="danger-outline" disabled={busy} onClick={() => setPending("ARCHIVED")}>{t("common.move_archive")}</Button>}
         </div>
       )}
       <p className="portal-dns-note">
-        Архивный портал перестаёт открываться по публичному адресу, а его материалы исчезают из
-        ответов агента. Ничего не удаляется: портал можно вернуть из архива.
+        {t("portals.archive_note")}
       </p>
       {error && <div className="portal-form-error">{error}</div>}
 
@@ -95,13 +95,13 @@ export function PortalPublishSettings({
         title={pending ? COPY[pending].title : ""}
         description={pending ? COPY[pending].description : ""}
         actions={<>
-          <Button variant="secondary" onClick={() => setPending(null)}>Отмена</Button>
+          <Button variant="secondary" onClick={() => setPending(null)}>{t("common.cancel")}</Button>
           <Button
             variant={pending === "ARCHIVED" ? "danger-outline" : "primary"}
             disabled={busy}
             onClick={() => pending && void apply(pending)}
           >
-            {pending === "ARCHIVED" ? "В архив" : pending === "DRAFT" ? "Снять" : "Опубликовать"}
+            {pending === "ARCHIVED" ? t("common.archive") : pending === "DRAFT" ? t("portals.unpublish_2") : t("common.publish")}
           </Button>
         </>}
       />
diff --git a/apps/internal-ui/src/features/support-portals/PortalSettings.tsx b/apps/internal-ui/src/features/support-portals/PortalSettings.tsx
index dd8e005..6916f93 100644
--- a/apps/internal-ui/src/features/support-portals/PortalSettings.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalSettings.tsx
@@ -16,6 +16,7 @@ import {
   PORTAL_SETTINGS_SECTIONS,
   type PortalSettingsSectionKey,
 } from "./sections";
+import { t } from "../../i18n";
 
 // Настройки портала (дизайн-базлайн v2, кадры PT4–PT6): не модалка на 960px с
 // пятью секциями подряд, а страница с субменю разделов 250px.
@@ -47,7 +48,7 @@ export function PortalSettings({
     ?? PORTAL_SETTINGS_SECTIONS[0];
   const domainLive = Boolean(portal.customDomain && portal.customDomainVerifiedAt);
   const hints: Partial<Record<PortalSettingsSectionKey, { text: string; tone: "ok" | "muted" }>> = {
-    domain: domainLive ? { text: "работает", tone: "ok" } : undefined,
+    domain: domainLive ? { text: t("portals.working"), tone: "ok" } : undefined,
   };
 
   return (
@@ -70,7 +71,7 @@ export function PortalSettings({
           </span>
         ))}
         <span className="portal-settings-nav-gap" />
-        <p>Изменения применяются к публичным страницам сразу после сохранения.</p>
+        <p>{t("portals.changes_reach_public_pages_as")}</p>
       </nav>
 
       <div className="portal-settings-content">
diff --git a/apps/internal-ui/src/features/support-portals/PortalWidgetSettings.tsx b/apps/internal-ui/src/features/support-portals/PortalWidgetSettings.tsx
index b3d648a..77b8379 100644
--- a/apps/internal-ui/src/features/support-portals/PortalWidgetSettings.tsx
+++ b/apps/internal-ui/src/features/support-portals/PortalWidgetSettings.tsx
@@ -8,6 +8,7 @@ import {
   type PortalWidgetOption,
   type SupportPortal,
 } from "./model";
+import { t } from "../../i18n";
 
 export function PortalWidgetSettings({
   canManage,
@@ -32,9 +33,9 @@ export function PortalWidgetSettings({
     try {
       const payload = await updateSupportPortal(portal.id, { widgetId });
       onChanged(payload.portal);
-      setFeedback("Веб-виджет обновлён");
+      setFeedback(t("portals.web_widget_updated"));
     } catch (caught) {
-      setFeedback(portalErrorMessage(caught, "Не удалось сохранить веб-виджет"));
+      setFeedback(portalErrorMessage(caught, t("portals.could_not_save_web_widget")));
     } finally {
       setBusy(false);
     }
@@ -43,23 +44,23 @@ export function PortalWidgetSettings({
   return (
     <div className="portal-settings-card">
       <label className="portal-field is-narrow">
-        <span className="portal-field-label">Веб-виджет</span>
+        <span className="portal-field-label">{t("common.web_widget_2")}</span>
         <span className="portal-select">
           <select
             disabled={!canManage}
             value={String(widgetId ?? "")}
             onChange={(event) => setWidgetId(event.target.value ? Number(event.target.value) : null)}
           >
-            <option value="">Не показывать</option>
+            <option value="">{t("portals.do_not_show")}</option>
             {widgets.map((widget) => <option key={widget.id} value={widget.id}>{widget.name}</option>)}
           </select>
           <Icon name="chevron" size={14} strokeWidth={2} />
         </span>
-        <small>Виджет доступен только анонимным посетителям портала.</small>
+        <small>{t("portals.widget_available_anonymous_portal_visitors")}</small>
       </label>
       {canManage && (
         <div className="portal-settings-actions">
-          <Button variant="primary" disabled={busy} onClick={() => void save()}>Сохранить виджет</Button>
+          <Button variant="primary" disabled={busy} onClick={() => void save()}>{t("portals.save_widget")}</Button>
           {feedback && <span className="portal-settings-note">{feedback}</span>}
         </div>
       )}
diff --git a/apps/internal-ui/src/features/support-portals/SupportPortalDetailPage.tsx b/apps/internal-ui/src/features/support-portals/SupportPortalDetailPage.tsx
index 6c25a12..0a6a4e1 100644
--- a/apps/internal-ui/src/features/support-portals/SupportPortalDetailPage.tsx
+++ b/apps/internal-ui/src/features/support-portals/SupportPortalDetailPage.tsx
@@ -24,6 +24,7 @@ import { PortalLibrary } from "./PortalLibrary";
 import { PortalSettings } from "./PortalSettings";
 import type { PortalSettingsSectionKey } from "./sections";
 import "./styles";
+import { t } from "../../i18n";
 
 // Карточка портала (дизайн-базлайн v2, кадры PT3–PT8): общая шапка с публичным
 // адресом, под ней — библиотека материалов, настройки или редактор статьи.
@@ -87,7 +88,7 @@ export function SupportPortalDetailPage({
       setPortal(payload.portal);
       setPendingStatus(null);
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось изменить статус портала"));
+      setError(portalErrorMessage(caught, t("portals.could_not_change_portal_status")));
       setPendingStatus(null);
     } finally {
       setBusy(false);
@@ -104,7 +105,7 @@ export function SupportPortalDetailPage({
       setEditing(undefined);
       await load();
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось опубликовать статью"));
+      setError(portalErrorMessage(caught, t("portals.could_not_publish_article")));
       setPublishing(null);
     } finally {
       setBusy(false);
@@ -133,11 +134,11 @@ export function SupportPortalDetailPage({
           onClose={() => setPublishing(null)}
           tone="warning"
           icon="check"
-          title="Опубликовать выбранную версию?"
-          description="Эта версия станет доступна посетителям портала."
+          title={t("portals.publish_selected_version")}
+          description={t("portals.version_will_become_available_portal")}
           actions={<>
-            <Button variant="secondary" onClick={() => setPublishing(null)}>Отмена</Button>
-            <Button variant="primary" disabled={busy} onClick={() => void publish()}>Опубликовать</Button>
+            <Button variant="secondary" onClick={() => setPublishing(null)}>{t("common.cancel")}</Button>
+            <Button variant="primary" disabled={busy} onClick={() => void publish()}>{t("common.publish")}</Button>
           </>}
         />
       </>
@@ -184,11 +185,11 @@ export function SupportPortalDetailPage({
         onClose={() => setPendingStatus(null)}
         tone="danger"
         icon="trash"
-        title="Перенести портал в архив?"
-        description="Портал и его материалы станут недоступны посетителям до восстановления."
+        title={t("portals.move_portal_archive")}
+        description={t("portals.portal_its_material_become_unavailable")}
         actions={<>
-          <Button variant="secondary" onClick={() => setPendingStatus(null)}>Отмена</Button>
-          <Button variant="danger-outline" disabled={busy} onClick={() => pendingStatus && void setStatus(pendingStatus)}>В архив</Button>
+          <Button variant="secondary" onClick={() => setPendingStatus(null)}>{t("common.cancel")}</Button>
+          <Button variant="danger-outline" disabled={busy} onClick={() => pendingStatus && void setStatus(pendingStatus)}>{t("common.archive")}</Button>
         </>}
       />
     </section>
diff --git a/apps/internal-ui/src/features/support-portals/SupportPortalsPage.tsx b/apps/internal-ui/src/features/support-portals/SupportPortalsPage.tsx
index 9cb3afd..3033165 100644
--- a/apps/internal-ui/src/features/support-portals/SupportPortalsPage.tsx
+++ b/apps/internal-ui/src/features/support-portals/SupportPortalsPage.tsx
@@ -8,7 +8,6 @@ import { ErrorScreen, LoadingState, StatusPill } from "../../shared/ui";
 import { Button, CopyButton, FilterDropdown, SearchInput } from "../../shared/ui-controls";
 import { useDebounced } from "../../shared/useDebounced";
 import { usePagedResource } from "../../shared/usePagedResource";
-import { pluralRu } from "../../shared/utils";
 import type { SessionUser } from "../../types";
 import {
   changePortalStatus,
@@ -28,6 +27,7 @@ import {
 import { PortalCreateDialog } from "./PortalCreateDialog";
 import { DecisionDialog } from "../../shared/DecisionDialog";
 import "./styles";
+import { t, tn } from "../../i18n";
 
 // Список порталов (дизайн-базлайн v2, кадры PT1/PT2). Адрес — колонка со
 // ссылкой и копированием, действия строки — в меню ⋯, архивные приглушены и
@@ -75,7 +75,7 @@ export function SupportPortalsPage({
     setFailed(false);
     return payload;
   }, [query]);
-  const portals = usePagedResource(loadPage, query, "Не удалось загрузить порталы");
+  const portals = usePagedResource(loadPage, query, t("portals.could_not_load_portals"));
   const load = portals.reload;
 
 
@@ -87,7 +87,7 @@ export function SupportPortalsPage({
       setArchiving(null);
       await load();
     } catch (caught) {
-      setError(portalErrorMessage(caught, "Не удалось перенести портал в архив"));
+      setError(portalErrorMessage(caught, t("portals.could_not_move_portal_archive")));
       setArchiving(null);
     } finally {
       setBusy(false);
@@ -98,9 +98,7 @@ export function SupportPortalsPage({
   if (!address) return <LoadingState />;
 
   const createButton = canManage ? (
-    <Button variant="primary" icon="plus" iconSize={16} onClick={() => setCreating(true)}>
-      Создать портал
-    </Button>
+    <Button variant="primary" icon="plus" iconSize={16} onClick={() => setCreating(true)}>{t("portals.create_portal")}</Button>
   ) : null;
 
   const dialogs = (
@@ -121,11 +119,11 @@ export function SupportPortalsPage({
         onClose={() => setArchiving(null)}
         tone="danger"
         icon="trash"
-        title="Перенести портал в архив?"
-        description="Портал и его материалы станут недоступны посетителям до восстановления."
+        title={t("portals.move_portal_archive")}
+        description={t("portals.portal_its_material_become_unavailable")}
         actions={<>
-          <Button variant="secondary" onClick={() => setArchiving(null)}>Отмена</Button>
-          <Button variant="danger-outline" disabled={busy} onClick={() => archiving && void archive(archiving)}>В архив</Button>
+          <Button variant="secondary" onClick={() => setArchiving(null)}>{t("common.cancel")}</Button>
+          <Button variant="danger-outline" disabled={busy} onClick={() => archiving && void archive(archiving)}>{t("common.archive")}</Button>
         </>}
       />
     </>
@@ -138,16 +136,16 @@ export function SupportPortalsPage({
       <section className="portals-page is-empty">
         <header className="portals-head">
           <div>
-            <h2>Порталы</h2>
-            <p>Публичные базы знаний для клиентов.</p>
+            <h2>{t("common.portals")}</h2>
+            <p>{t("portals.public_knowledge_bases_customers")}</p>
           </div>
           {createButton}
         </header>
         <div className="portals-empty">
           <div>
             <span className="portals-empty-mark"><Icon name="globe" size={27} strokeWidth={1.7} /></span>
-            <h3>Создайте первый портал поддержки</h3>
-            <p>Портал — публичная страница с инструкциями и ответами на частые вопросы. Клиент читает статью и, если не нашёл ответ, пишет в чат прямо со страницы.</p>
+            <h3>{t("portals.create_first_support_portal")}</h3>
+            <p>{t("portals.portal_public_page_with_instructions")}</p>
             <div className="portals-empty-actions">
               {createButton}
               {/* Витрина посетителя — это и есть публичный help-контур установки:
@@ -157,9 +155,7 @@ export function SupportPortalsPage({
                 href={`${address.scheme}://${address.baseDomain}${address.port ? `:${address.port}` : ""}/`}
                 rel="noreferrer"
                 target="_blank"
-              >
-                Как это выглядит у клиента
-              </a>
+              >{t("portals.how_looks_customer")}</a>
             </div>
           </div>
         </div>
@@ -172,8 +168,8 @@ export function SupportPortalsPage({
     <section className="portals-page">
       <header className="portals-head">
         <div>
-          <h2>Порталы</h2>
-          <p>Публичные базы знаний для клиентов. Каждый портал — свой адрес, оформление и материалы.</p>
+          <h2>{t("common.portals")}</h2>
+          <p>{t("portals.public_knowledge_bases_customers_every")}</p>
         </div>
         {createButton}
       </header>
@@ -184,13 +180,13 @@ export function SupportPortalsPage({
         <div className="portals-card-head">
           <SearchInput
             className="portals-search"
-            placeholder="Поиск по названию и адресу"
+            placeholder={t("portals.search_by_name_address")}
             value={search}
             onChange={setSearch}
           />
           <FilterDropdown
-            caption="Статус:"
-            label={status.length === 1 ? STATUS_FILTER.find((item) => item.value === status[0])!.label : "Все"}
+            caption={t("portals.status")}
+            label={status.length === 1 ? STATUS_FILTER.find((item) => item.value === status[0])!.label : t("common.all")}
             multiple
             open={statusOpen}
             options={STATUS_FILTER}
@@ -208,11 +204,11 @@ export function SupportPortalsPage({
         <table className="portals-table">
           <thead>
             <tr>
-              <th>ПОРТАЛ</th>
-              <th>ПУБЛИЧНЫЙ АДРЕС</th>
-              <th>СТАТУС</th>
-              <th>МАТЕРИАЛЫ</th>
-              <th>ОБНОВЛЁН</th>
+              <th>{t("portals.portal")}</th>
+              <th>{t("portals.public_address")}</th>
+              <th>{t("common.status_2")}</th>
+              <th>{t("portals.material_2")}</th>
+              <th>{t("portals.updated")}</th>
               <th />
             </tr>
           </thead>
@@ -222,14 +218,14 @@ export function SupportPortalsPage({
               const ownDomain = Boolean(portal.customDomain && portal.customDomainVerifiedAt);
               const archived = portal.status === "ARCHIVED";
               const menuItems = [
-                { key: "content", label: <button type="button" onClick={() => openPortal(portal.id)}><Icon name="folder" size={15} strokeWidth={1.9} />Открыть материалы</button> },
-                { key: "settings", label: <button type="button" onClick={() => openPortalSettings(portal.id)}><Icon name="settings" size={15} strokeWidth={1.9} />Настройки портала</button> },
+                { key: "content", label: <button type="button" onClick={() => openPortal(portal.id)}><Icon name="folder" size={15} strokeWidth={1.9} />{t("portals.open_material")}</button> },
+                { key: "settings", label: <button type="button" onClick={() => openPortalSettings(portal.id)}><Icon name="settings" size={15} strokeWidth={1.9} />{t("shared.portal_settings")}</button> },
                 { key: "divider-1", type: "divider" as const },
-                { key: "copy", label: <button type="button" onClick={() => void navigator.clipboard?.writeText(portal.publicUrl)}><Icon name="copy" size={15} strokeWidth={1.9} />Копировать публичную ссылку</button> },
-                { key: "open", label: <button type="button" onClick={() => window.open(portal.publicUrl, "_blank", "noreferrer")}><Icon name="external" size={15} strokeWidth={1.9} />Открыть портал</button> },
+                { key: "copy", label: <button type="button" onClick={() => void navigator.clipboard?.writeText(portal.publicUrl)}><Icon name="copy" size={15} strokeWidth={1.9} />{t("portals.copy_public_link")}</button> },
+                { key: "open", label: <button type="button" onClick={() => window.open(portal.publicUrl, "_blank", "noreferrer")}><Icon name="external" size={15} strokeWidth={1.9} />{t("portals.open_portal")}</button> },
                 ...(canManage && !archived ? [
                   { key: "divider-2", type: "divider" as const },
-                  { key: "archive", label: <button className="danger" type="button" onClick={() => setArchiving(portal)}><Icon name="trash" size={15} strokeWidth={1.9} />Перенести в архив</button> },
+                  { key: "archive", label: <button className="danger" type="button" onClick={() => setArchiving(portal)}><Icon name="trash" size={15} strokeWidth={1.9} />{t("common.move_archive")}</button> },
                 ] : []),
               ];
               return (
@@ -249,8 +245,7 @@ export function SupportPortalsPage({
                       <CopyButton className="portals-copy" label="" value={portal.publicUrl} />
                       {ownDomain && (
                         <small className="portals-domain-badge">
-                          <Icon name="check" size={11} strokeWidth={2.6} />свой домен
-                        </small>
+                          <Icon name="check" size={11} strokeWidth={2.6} />{t("portals.custom_domain_2")}</small>
                       )}
                     </span>
                   </td>
@@ -259,7 +254,7 @@ export function SupportPortalsPage({
                   <td className="portals-updated-cell">{updatedAt(portal.updatedAt)}</td>
                   <td className="row-actions" onClick={(event) => event.stopPropagation()}>
                     <Dropdown menu={{ items: menuItems }} overlayClassName="app-dropdown is-portal-menu" placement="bottomRight" trigger={["click"]}>
-                      <button aria-label={`Действия: ${portal.name}`} className="row-menu-button" type="button"><Icon name="more" size={16} strokeWidth={2} /></button>
+                      <button aria-label={t("common.actions_for", { name: portal.name })} className="row-menu-button" type="button"><Icon name="more" size={16} strokeWidth={2} /></button>
                     </Dropdown>
                   </td>
                 </tr>
@@ -269,7 +264,7 @@ export function SupportPortalsPage({
         </table>
 
         <Pagination
-          note={`${pluralRu(portals.total, ["портал", "портала", "порталов"])} · архивные показываются последними`}
+          note={t("portals.portals_note", { count: tn("plural.portals", portals.total) })}
           page={portals.page}
           pageCount={portals.pageCount}
           onPage={portals.setPage}
diff --git a/apps/internal-ui/src/features/support-portals/downloadArticleTemplate.ts b/apps/internal-ui/src/features/support-portals/downloadArticleTemplate.ts
index 0e1eef1..4068bb3 100644
--- a/apps/internal-ui/src/features/support-portals/downloadArticleTemplate.ts
+++ b/apps/internal-ui/src/features/support-portals/downloadArticleTemplate.ts
@@ -1,27 +1,36 @@
+import { t } from "../../i18n";
+
 // Каркас YAML-файла для импорта статей портала (формат parseArticleYaml):
 // articles: [{ slug, categoryPath: [..], locale?, title, summary?, content }].
 // summary необязателен — шаблон показывает оба варианта.
-const ARTICLE_TEMPLATE = `articles:
+//
+// Ключи YAML и slug не переводятся: первое читает парсер, второе — часть
+// публичного адреса статьи. Переводится то, что человек заменит своим:
+// названия разделов, заголовки и текст. Собирается функцией, а не константой:
+// константа посчиталась бы при импорте модуля, до выбора языка.
+function articleTemplate(): string {
+  return `articles:
   - slug: "kak-oformit-vozvrat"
     categoryPath:
-      - "Возврат"
-      - "Оформление"
-    title: "Как оформить возврат"
-    summary: "Короткое описание (необязательно)"
+      - "${t("portals.template_section_returns")}"
+      - "${t("common.appearance")}"
+    title: "${t("portals.template_title_return")}"
+    summary: "${t("ai.template_description")}"
     content: |
-      Текст статьи в Markdown.
+      ${t("portals.template_content")}
 
   - slug: "garantiya"
     categoryPath:
-      - "Возврат"
-    title: "Гарантия"
+      - "${t("portals.template_section_returns")}"
+    title: "${t("portals.template_title_warranty")}"
     content: |
-      Текст статьи без описания.
+      ${t("portals.template_content_no_summary")}
 `;
+}
 
 export function downloadArticleTemplate(): void {
   const url = URL.createObjectURL(
-    new Blob([`\uFEFF${ARTICLE_TEMPLATE}`], { type: "text/yaml;charset=utf-8" }),
+    new Blob([`\uFEFF${articleTemplate()}`], { type: "text/yaml;charset=utf-8" }),
   );
   const link = document.createElement("a");
   link.href = url;
diff --git a/apps/internal-ui/src/features/support-portals/markdownTools.ts b/apps/internal-ui/src/features/support-portals/markdownTools.ts
index f9414a9..f8c1f24 100644
--- a/apps/internal-ui/src/features/support-portals/markdownTools.ts
+++ b/apps/internal-ui/src/features/support-portals/markdownTools.ts
@@ -1,20 +1,21 @@
 import type { MarkdownTool } from "../../shared/markdown/markdownTools";
+import { t } from "../../i18n";
 
 // Панель Markdown редактора статьи (дизайн-базлайн v2, кадр PT7).
 export const MARKDOWN_TOOLS: MarkdownTool[] = [
-  { key: "h1", title: "Заголовок 1", text: "H1" },
-  { key: "h2", title: "Заголовок 2", text: "H2" },
+  { key: "h1", title: t("ai.heading_1"), text: "H1" },
+  { key: "h2", title: t("ai.heading_2"), text: "H2" },
   { key: "divider-1", title: "", divider: true },
-  { key: "bold", title: "Полужирный", icon: "bold" },
-  { key: "italic", title: "Курсив", icon: "italic" },
-  { key: "link", title: "Ссылка", icon: "link" },
-  { key: "code", title: "Код", icon: "code" },
+  { key: "bold", title: t("ai.bold"), icon: "bold" },
+  { key: "italic", title: t("ai.italic"), icon: "italic" },
+  { key: "link", title: t("ai.link"), icon: "link" },
+  { key: "code", title: t("ai.code"), icon: "code" },
   { key: "divider-2", title: "", divider: true },
-  { key: "list", title: "Список", icon: "list" },
-  { key: "numlist", title: "Нумерованный список", icon: "numlist" },
-  { key: "quote", title: "Цитата", icon: "quote" },
-  { key: "table", title: "Таблица", icon: "table" },
+  { key: "list", title: t("ai.list"), icon: "list" },
+  { key: "numlist", title: t("ai.numbered_list"), icon: "numlist" },
+  { key: "quote", title: t("ai.quote"), icon: "quote" },
+  { key: "table", title: t("ai.table"), icon: "table" },
   { key: "divider-3", title: "", divider: true },
-  { key: "image", title: "Вставить изображение", icon: "image", accent: true },
-  { key: "attach", title: "Прикрепить файл", icon: "attach" },
+  { key: "image", title: t("portals.insert_image"), icon: "image", accent: true },
+  { key: "attach", title: t("common.attach_file"), icon: "attach" },
 ];
diff --git a/apps/internal-ui/src/features/support-portals/model.ts b/apps/internal-ui/src/features/support-portals/model.ts
index be74cb5..4a4eac1 100644
--- a/apps/internal-ui/src/features/support-portals/model.ts
+++ b/apps/internal-ui/src/features/support-portals/model.ts
@@ -1,6 +1,7 @@
 import { ApiError } from "../../api/client";
 import type { PagedPayload } from "../../shared/usePagedResource";
 import type { PortalThemeSchemeSetting } from "../help-center/themes/types";
+import { t } from "../../i18n";
 
 export type PortalStatus = "DRAFT" | "PUBLISHED" | "ARCHIVED";
 export type ArticleStatus = "DRAFT" | "PUBLISHED" | "ARCHIVED";
@@ -143,15 +144,15 @@ export {
 } from "./api";
 
 export const PORTAL_STATUS_LABEL: Record<PortalStatus, string> = {
-  DRAFT: "Черновик",
-  PUBLISHED: "Опубликован",
-  ARCHIVED: "В архиве",
+  DRAFT: t("common.draft"),
+  PUBLISHED: t("shared.published"),
+  ARCHIVED: t("portals.archived"),
 };
 
 export const ARTICLE_STATUS_LABEL: Record<ArticleStatus, string> = {
-  DRAFT: "Черновик",
-  PUBLISHED: "Опубликована",
-  ARCHIVED: "В архиве",
+  DRAFT: t("common.draft"),
+  PUBLISHED: t("portals.published"),
+  ARCHIVED: t("portals.archived"),
 };
 
 type ValidationPayload = {
@@ -159,17 +160,28 @@ type ValidationPayload = {
   errors?: Record<string, string[]>;
 };
 
+/** Сообщение написано для человека, а не для кода.
+ *
+ *  DRF отдаёт в ошибках и машинные коды («invalid», «unique»), и готовые
+ *  фразы. Раньше человеческие отличались по наличию кириллицы — на английском
+ *  этот признак отбросил бы как раз то, что нужно показать. Признак теперь
+ *  языконезависимый: во фразе есть пробел, в коде — нет.
+ */
+function isReadable(message: string): boolean {
+  return message.trim().includes(" ");
+}
+
 export function portalErrorMessage(error: unknown, fallback: string): string {
   if (!(error instanceof ApiError)) return fallback;
   const payload = error.payload as ValidationPayload;
   const first = payload.errors
     ? Object.values(payload.errors).flat().find(Boolean)
     : undefined;
-  if (first && /[А-Яа-яЁё]/.test(first)) return first;
-  if (error.status === 403) return "Недостаточно прав для этого действия";
-  if (error.status === 404) return "Запись не найдена";
-  if (error.status === 409) return "Изменение конфликтует с текущими данными";
-  if (error.status === 429) return "Слишком много запросов. Повторите позже";
+  if (first && isReadable(first)) return first;
+  if (error.status === 403) return t("portals.not_enough_rights_action");
+  if (error.status === 404) return t("portals.record_not_found");
+  if (error.status === 409) return t("portals.change_conflicts_with_current_data");
+  if (error.status === 429) return t("portals.too_many_requests_try_again");
   return fallback;
 }
 
@@ -179,7 +191,7 @@ export function portalFieldErrors(error: unknown): Record<string, string> {
   return Object.fromEntries(
     Object.entries(payload.errors ?? {}).map(([field, messages]) => [
       field,
-      messages.find((message) => /[А-Яа-яЁё]/.test(message)) ?? "Проверьте значение",
+      messages.find(isReadable) ?? t("portals.check_value"),
     ]),
   );
 }
diff --git a/apps/internal-ui/src/features/support-portals/parseArticleYaml.ts b/apps/internal-ui/src/features/support-portals/parseArticleYaml.ts
index 60a9c35..b436aa5 100644
--- a/apps/internal-ui/src/features/support-portals/parseArticleYaml.ts
+++ b/apps/internal-ui/src/features/support-portals/parseArticleYaml.ts
@@ -1,4 +1,5 @@
 import { load as parseYaml } from "js-yaml";
+import { t } from "../../i18n";
 
 export type ArticleImportDocument = {
   slug: string;
@@ -22,40 +23,40 @@ export function parseArticleYaml(text: string): ParsedArticleYaml {
   try {
     data = parseYaml(text);
   } catch (error) {
-    throw new Error(error instanceof Error ? `Невалидный YAML: ${error.message}` : "Невалидный YAML");
+    throw new Error(error instanceof Error ? t("ai.invalid_yaml_reason", { reason: error.message }) : t("portals.invalid_yaml"));
   }
   if (!data || typeof data !== "object") {
-    throw new Error("Ожидается объект верхнего уровня с ключом articles");
+    throw new Error(t("portals.top_level_object_with_articles"));
   }
   const root = data as { articles?: unknown };
   if (!Array.isArray(root.articles) || root.articles.length === 0) {
-    throw new Error("articles должен быть непустым списком");
+    throw new Error(t("portals.articles_must_non_empty_list"));
   }
   const articles: ArticleImportDocument[] = [];
   root.articles.forEach((item, index) => {
     if (!item || typeof item !== "object") {
-      throw new Error(`Статья #${index + 1}: должна быть объектом`);
+      throw new Error(t("portals.article_must_be_object", { index: index + 1 }));
     }
     const record = item as Record<string, unknown>;
     const slug = record.slug === undefined || record.slug === null ? "" : String(record.slug).trim().toLowerCase();
     if (!slug) {
-      throw new Error(`Статья #${index + 1}: обязательное поле «slug» пустое`);
+      throw new Error(t("portals.article_slug_empty", { index: index + 1 }));
     }
     const title = record.title === undefined || record.title === null ? "" : String(record.title).trim();
     if (!title) {
-      throw new Error(`Статья #${index + 1}: обязательное поле «title» пустое`);
+      throw new Error(t("portals.article_title_empty", { index: index + 1 }));
     }
     const content = record.content === undefined || record.content === null ? "" : String(record.content);
     if (!content.trim()) {
-      throw new Error(`Статья #${index + 1}: обязательное поле «content» пустое`);
+      throw new Error(t("portals.article_content_empty", { index: index + 1 }));
     }
     if (!Array.isArray(record.categoryPath) || record.categoryPath.length === 0) {
-      throw new Error(`Статья #${index + 1}: обязательное поле «categoryPath» — непустой список разделов`);
+      throw new Error(t("portals.article_category_path_required", { index: index + 1 }));
     }
     const categoryPath: string[] = [];
     record.categoryPath.forEach((segment, segmentIndex) => {
       if (segment === undefined || segment === null || !String(segment).trim()) {
-        throw new Error(`Статья #${index + 1}: раздел #${segmentIndex + 1} пустой`);
+        throw new Error(t("portals.article_section_empty", { index: index + 1, segment: segmentIndex + 1 }));
       }
       categoryPath.push(String(segment).trim());
     });
diff --git a/apps/internal-ui/src/features/support-portals/portalText.ts b/apps/internal-ui/src/features/support-portals/portalText.ts
index 7049789..ff20796 100644
--- a/apps/internal-ui/src/features/support-portals/portalText.ts
+++ b/apps/internal-ui/src/features/support-portals/portalText.ts
@@ -1,13 +1,14 @@
-import { pluralRu, shortDateTime } from "../../shared/utils";
+import { shortDateTime } from "../../shared/utils";
 import type { PortalArticle, SupportPortal } from "./model";
+import { t, tn } from "../../i18n";
 
 const LOCALE_NAMES: Record<string, string> = {
-  ru: "русский",
-  en: "английский",
+  ru: t("portals.russian_2"),
+  en: t("portals.english"),
 };
 
 export const LOCALE_OPTIONS: Array<[string, string]> = [
-  ["ru", "Русский"],
+  ["ru", t("portals.russian")],
   ["en", "English"],
 ];
 
@@ -19,14 +20,14 @@ export function localeName(locale: string): string {
 export function portalSubtitle(portal: SupportPortal): string {
   const created = new Intl.DateTimeFormat("ru-RU", { day: "numeric", month: "long" })
     .format(new Date(portal.createdAt));
-  return `${localeName(portal.defaultLocale)} · создан ${created}`;
+  return t("portals.locale_created", { locale: localeName(portal.defaultLocale), date: created });
 }
 
 /** «6 разделов · 48 статей» — колонка «Материалы» и подзаголовок карточки. */
 export function contentSummary(portal: SupportPortal): string {
   return [
-    pluralRu(portal.categoryCount, ["раздел", "раздела", "разделов"]),
-    pluralRu(portal.articleCount, ["статья", "статьи", "статей"]),
+    tn("plural.sections", portal.categoryCount),
+    tn("plural.articles", portal.articleCount),
   ].join(" · ");
 }
 
@@ -51,10 +52,10 @@ export function revisionSummary(article: PortalArticle): {
   const published = article.publishedRevision?.revision ?? null;
   const latest = article.latestRevision?.revision ?? null;
   if (published === null) {
-    return { revision: latest === null ? "—" : String(latest), note: "не опубликована" };
+    return { revision: latest === null ? "—" : String(latest), note: t("portals.not_published") };
   }
   return {
     revision: String(published),
-    note: latest !== null && latest > published ? `черновая ${latest}` : "",
+    note: latest !== null && latest > published ? t("portals.draft_revision", { revision: latest }) : "",
   };
 }
diff --git a/apps/internal-ui/src/features/support-portals/sections.ts b/apps/internal-ui/src/features/support-portals/sections.ts
index f5583e7..0187bfc 100644
--- a/apps/internal-ui/src/features/support-portals/sections.ts
+++ b/apps/internal-ui/src/features/support-portals/sections.ts
@@ -1,4 +1,5 @@
 import type { Icon } from "../../shared/icons";
+import { t } from "../../i18n";
 
 type IconName = Parameters<typeof Icon>[0]["name"];
 
@@ -24,38 +25,38 @@ export type PortalSettingsSection = {
 export const PORTAL_SETTINGS_SECTIONS: PortalSettingsSection[] = [
   {
     key: "basics",
-    label: "Основные",
+    label: t("portals.basics"),
     icon: "settings",
-    heading: "Основные",
-    lead: "Название, публичный адрес и язык материалов портала.",
+    heading: t("portals.basics"),
+    lead: t("portals.portal_s_name_public_address"),
   },
   {
     key: "domain",
-    label: "Адрес и домен",
+    label: t("portals.address_domain"),
     icon: "globe",
-    heading: "Свой домен",
-    lead: "Портал будет открываться по адресу вашей компании. Адрес установки продолжит работать.",
+    heading: t("portals.custom_domain"),
+    lead: t("portals.portal_will_open_at_company"),
   },
   {
     key: "theme",
-    label: "Оформление",
+    label: t("common.appearance"),
     icon: "paint",
-    heading: "Оформление",
-    lead: "Тема публичных страниц и цветовая схема. Применяется до первого кадра — посетитель не видит смены оформления. Список тем — из сборки установки.",
+    heading: t("common.appearance"),
+    lead: t("portals.theme_colour_scheme_public_pages"),
   },
   {
     key: "widget",
-    label: "Веб-виджет",
+    label: t("common.web_widget_2"),
     icon: "widget",
-    heading: "Веб-виджет",
-    lead: "Публичный чат отображается на всех страницах портала.",
+    heading: t("common.web_widget_2"),
+    lead: t("portals.public_chat_appears_every_portal"),
   },
   {
     key: "danger",
-    label: "Публикация и архив",
+    label: t("portals.publishing_archive"),
     icon: "danger",
-    heading: "Публикация и архив",
-    lead: "Публикация открывает материалы посетителям, архив прячет портал целиком.",
+    heading: t("portals.publishing_archive"),
+    lead: t("portals.publishing_opens_material_visitors_archive"),
     divider: true,
   },
 ];
diff --git a/apps/internal-ui/src/i18n/catalog.test.ts b/apps/internal-ui/src/i18n/catalog.test.ts
new file mode 100644
index 0000000..90cc222
--- /dev/null
+++ b/apps/internal-ui/src/i18n/catalog.test.ts
@@ -0,0 +1,42 @@
+import { describe, expect, it } from "vitest";
+
+import { en } from "./en";
+import { ru } from "./ru";
+
+// Совпадение наборов ключей проверяет компилятор: en типизирован по ru, и
+// пропущенный перевод — ошибка сборки. А вот параметры фразы он не сверяет:
+// «{count} из {total}» и «{count} of {tota1}» для него одинаково валидны, и
+// разъехавшаяся подстановка выдала бы на экране «{tota1}» вместо числа.
+
+const PLACEHOLDER = /\{(\w+)\}/g;
+
+function names(message: unknown): Set<string> {
+  const forms = typeof message === "string" ? [message] : Object.values(message as Record<string, string>);
+  return new Set(forms.flatMap((form) => [...form.matchAll(PLACEHOLDER)].map((match) => match[1])));
+}
+
+describe("словарь рабочего места", () => {
+  it("держит одинаковые параметры в обоих языках", () => {
+    const mismatched: string[] = [];
+    for (const [key, russian] of Object.entries(ru)) {
+      const left = [...names(russian)].sort().join(",");
+      const right = [...names(en[key as keyof typeof ru])].sort().join(",");
+      if (left !== right) mismatched.push(`${key}: «${left}» ≠ «${right}»`);
+    }
+    expect(mismatched).toEqual([]);
+  });
+
+  it("не оставляет пустых строк", () => {
+    const empty = Object.entries(en).filter(([, value]) => typeof value === "string" && !value.trim());
+    expect(empty).toEqual([]);
+  });
+
+  it("держит одинаковый набор форм числа", () => {
+    const mismatched: string[] = [];
+    for (const [key, russian] of Object.entries(ru)) {
+      const english = en[key as keyof typeof ru];
+      if (typeof russian !== typeof english) mismatched.push(key);
+    }
+    expect(mismatched).toEqual([]);
+  });
+});
diff --git a/apps/internal-ui/src/i18n/en.ts b/apps/internal-ui/src/i18n/en.ts
new file mode 100644
index 0000000..508f381
--- /dev/null
+++ b/apps/internal-ui/src/i18n/en.ts
@@ -0,0 +1,1410 @@
+// English catalogue.
+//
+// Typed against the Russian one: a missing key fails `tsc`, so a screen cannot
+// quietly fall back to Russian for an English-speaking operator.
+
+import type { Message } from "@chatballs/shared";
+
+import type { MessageKey } from "./ru";
+
+export const en: Record<MessageKey, Message> = {
+  "admin.30_days": "30 days",
+  "admin.7_days": "7 days",
+  "admin.90_days": "90 days",
+  "admin.access": "Access",
+  "admin.access_block": "Access block",
+  "admin.access_recovery": "Access recovery",
+  "admin.account": "Account",
+  "admin.action_code": "Action code",
+  "admin.action_recorded_audit_log": "The action is recorded in the audit log",
+  "admin.activate": "Activate",
+  "admin.active_devices": "{count} devices",
+  "admin.active_sessions_ended": "Active sessions ended",
+  "admin.add_operator": "Add an operator",
+  "admin.all_operators": "All operators",
+  "admin.all_time": "All time",
+  "admin.atomic_operation_organization_keeps_exactly": "An atomic operation · the organization keeps exactly one owner",
+  "admin.audit_log_with_total": "Log of actions in the organization · {total}",
+  "admin.block": "Block",
+  "admin.block_operator": "Block the operator",
+  "admin.can_now_sign_with_new": "You can now sign in with the new password.",
+  "admin.cannot_scan_enter_key_manually": "Cannot scan it? Enter the key manually:",
+  "admin.change_address": "Change the address",
+  "admin.change_temporary_password": "Change the temporary password",
+  "admin.chat_only": "Chat only",
+  "admin.chatballs_mark_will_shown_menu": "The Chatballs mark will be shown in the menu again instead.",
+  "admin.check_email": "Check your email",
+  "admin.checking_link": "Checking the link",
+  "admin.checking_password_reset_link": "Checking the password reset link…",
+  "admin.close_form": "Close the form",
+  "admin.close_panel": "Close the panel",
+  "admin.code_did_not_match_try": "The code did not match. Try again",
+  "admin.code_from_authenticator_app": "Code from your authenticator app",
+  "admin.code_refreshes": "The code refreshes in",
+  "admin.confirm": "Confirm",
+  "admin.contact_support": "Contact support",
+  "admin.copied_close": "Copied, close",
+  "admin.could_not_create_organization": "Could not create the organization",
+  "admin.could_not_load_candidates": "Could not load the candidates",
+  "admin.could_not_load_data": "Could not load the data",
+  "admin.could_not_load_log": "Could not load the log",
+  "admin.could_not_load_operator_card": "Could not load the operator card",
+  "admin.could_not_load_operators": "Could not load the operators",
+  "admin.could_not_save_changes": "Could not save the changes",
+  "admin.could_not_save_password": "Could not save the password",
+  "admin.could_not_send_email": "Could not send the email",
+  "admin.create_operator": "Create the operator",
+  "admin.created": "Created",
+  "admin.creating": "Creating",
+  "admin.creation_failed": "Creation failed",
+  "admin.credentials": "Credentials",
+  "admin.credentials_role_groups": "Credentials · role · groups",
+  "admin.currency": "Currency",
+  "admin.danger_zone": "Danger zone",
+  "admin.e_g_operator": "e.g. Operator",
+  "admin.earlier": "Earlier",
+  "admin.elena_kuznetsova": "Elena Kuznetsova",
+  "admin.email_sent": "Email sent",
+  "admin.end_all": "End all",
+  "admin.end_sessions": "End the sessions",
+  "admin.ends_every_session_immediately_stops": "Ends every session immediately and stops HTTP and realtime actions. Audit records and authorship are kept. Requires confirmation.",
+  "admin.enter_6_digit_code_from": "Enter the 6-digit code from the authenticator app for",
+  "admin.enter_code_from_app": "Enter the code from the app",
+  "admin.enter_new_password": "Enter a new password",
+  "admin.enter_work_email_we_will": "Enter your work email and we will send a link to create a new password.",
+  "admin.fair_password": "Fair password",
+  "admin.first_access_password": "First-access password",
+  "admin.first_last_name": "First and last name",
+  "admin.first_password_goes_to": "The first-access password will be sent to {email}",
+  "admin.first_run_create_organization_owner": "First run: create the organization and the owner account",
+  "admin.follow_link_email_set_new": "Follow the link in the email to set a new password.",
+  "admin.former_owner_s_new_role": "The former owner's new role",
+  "admin.full_access_exactly_one_per": "Full access. Exactly one per organization. Changed only by transferring ownership.",
+  "admin.full_access_identical_owner_owner": "Full access, identical to the owner. The owner differs in one way only: they cannot be deleted.",
+  "admin.generate_show_me": "Generate and show it to me",
+  "admin.good_password": "Good password",
+  "admin.good_see": "Good to see you!",
+  "admin.group_decides_which_conversations_visible": "A group decides which conversations are visible and grants no rights.",
+  "admin.group_decides_which_conversations_visible_2": "A group decides which conversations are visible and grants no rights",
+  "admin.group_will_be_deleted": "“{name}” will be deleted; its conversations become “No group”.",
+  "admin.hide_password": "Hide the password",
+  "admin.i_understand_consequences_confirm_transfer": "I understand the consequences and confirm the transfer of organization ownership.",
+  "admin.if": "If",
+  "admin.if_address_registered_we_will": "If the address is registered, we will send a password reset link. The link is valid for 30 minutes.",
+  "admin.install_demo_data": "Install demo data",
+  "admin.last_password_change": "Last change: {date} · a new one can be emailed, or shown and copied",
+  "admin.last_sign": "Last sign-in",
+  "admin.link_does_not_work": "The link does not work",
+  "admin.link_has_expired_or_has": "The link has expired or has already been used.",
+  "admin.link_not_valid": "The link is not valid",
+  "admin.link_valid_30_minutes_one": "A link is valid for 30 minutes and for one use only. Request access recovery again.",
+  "admin.list_holds_active_administrators_only": "The list holds active administrators only. To transfer ownership to an operator, make them an administrator first.",
+  "admin.log_actions_organization": "Log of actions in the organization",
+  "admin.logo": "Logo",
+  "admin.logo_removed": "Logo removed",
+  "admin.logo_updated": "Logo updated",
+  "admin.main_details": "Main details",
+  "admin.mark_all_as_read": "Mark all as read",
+  "admin.member_count": "{count} staff",
+  "admin.name": "Your name",
+  "admin.name_email_or_position": "Name, email or position",
+  "admin.never_signed": "never signed in",
+  "admin.new_operator": "New operator",
+  "admin.new_owner_administrators_only": "New owner · administrators only",
+  "admin.new_owner_gains_full_access": "The new owner gains full access. You lose the owner's rights, including ownership transfer and administrator management. The operation is audited and can be undone only by another transfer.",
+  "admin.no_access_code": "No access to the code?",
+  "admin.no_email_after_couple_minutes": "No email after a couple of minutes? Check the spam folder or request again — the link is valid for 30 minutes.",
+  "admin.no_events_yet": "No events yet",
+  "admin.no_events_yet_2": "No events yet.",
+  "admin.no_notifications": "No notifications",
+  "admin.no_operators_found": "No operators found",
+  "admin.nord_atelier": "Nord Atelier",
+  "admin.nothing_matched_filters": "Nothing matched the filters",
+  "admin.notifications": "Notifications",
+  "admin.off_operator": "Off for this operator",
+  "admin.one_moment": "One moment.",
+  "admin.open_card": "Open the card",
+  "admin.operator_blocked": "Operator blocked",
+  "admin.operator_blocked_cannot_sign_unblocking": "The operator is blocked and cannot sign in. Unblocking restores access according to their active assignments.",
+  "admin.operator_created": "Operator created",
+  "admin.operator_details_changed": "Operator details changed",
+  "admin.operator_gets_email_with_first": "The operator gets an email with a first sign-in link. Use this when the organization's email is configured and working.",
+  "admin.operator_groups_changed": "Operator groups changed",
+  "admin.operator_password_reset": "Operator password reset",
+  "admin.operator_s_active_sessions_were": "The operator's active sessions were ended; they will set their own password at the next sign-in.",
+  "admin.operator_unblocked": "Operator unblocked",
+  "admin.operators_agents_conversations_knowledge_fictional": "Operators, agents, conversations and knowledge of a fictional atelier — to see the system at work. Removed under Settings with one button.",
+  "admin.organization_details_saved": "Organization details saved",
+  "admin.organization_logo_alt": "{name} logo",
+  "admin.organization_name": "Organization name",
+  "admin.organization_ownership_transferred": "Organization ownership transferred",
+  "admin.owner": "→ Owner",
+  "admin.owner_admin_have_identical_rights": "OWNER and ADMIN have identical rights; EMPLOYEE works in chat only.",
+  "admin.owner_cannot_blocked_or_deleted": "The owner cannot be blocked or deleted, so their card carries no other dangerous actions.",
+  "admin.owner_cannot_deleted_blocked_or": "The owner cannot be deleted, blocked or given another role — the only way to change the owner's role is to transfer ownership.",
+  "admin.owner_s_role_changes_only": "The owner's role changes only by transferring ownership.",
+  "admin.ownership_passes_administrator_only_they": "Ownership passes to an administrator only: they already have full access, and after the transfer they gain the owner's protected actions. The operation is atomic, audited and requires confirmation.",
+  "admin.ownership_transfer": "Ownership transfer",
+  "admin.ownership_transfer_failed": "Ownership transfer failed",
+  "admin.password_appears_right_after_creation": "The password appears right after creation — copy it",
+  "admin.password_reset": "Password reset",
+  "admin.password_shown_once_after_creation": "The password is shown once after creation — copy it and hand it over in person. Use this when email does not arrive or the mailbox is not working yet.",
+  "admin.password_shown_once_not_stored": "The password is shown once and is not stored in the clear on the server. Copy it and hand it over in person — the operator changes it at the first sign-in. Once this window is closed, the only way back is another reset.",
+  "admin.password_was_changed_sign_chatballs": "The password was changed. Sign in to Chatballs with the new one.",
+  "admin.password_was_generated_shown_once": "The password was generated and is shown once — copy it now.",
+  "admin.people_count": "{count} people",
+  "admin.period": "Period",
+  "admin.png_jpeg_or_webp_up": "PNG, JPEG or WebP · up to 2 MB. Shown in the sidebar, the widget and emails.",
+  "admin.position_groups": "Position and groups",
+  "admin.qr_code_setting_up_totp": "QR code for setting up TOTP",
+  "admin.recover_access": "Recover access",
+  "admin.registered_with_chatballs_email_with": "is registered with Chatballs, an email with a password reset link has been sent to it.",
+  "admin.rejected": "Rejected",
+  "admin.remove_logo": "Remove the logo?",
+  "admin.repeat_password": "Repeat the password",
+  "admin.required_at_every_sign": "On · required at every sign-in",
+  "admin.reset_password": "Reset the password",
+  "admin.result": "Result",
+  "admin.roles_groups_showing": "Roles and groups · showing",
+  "admin.roles_groups_shown": "Roles and groups · showing {shown} of {total}",
+  "admin.russian_rouble_rub": "Russian rouble (RUB)",
+  "admin.save_sign": "Save and sign in",
+  "admin.scan_qr_code": "Scan the QR code",
+  "admin.scan_qr_code_authenticator_app": "Scan the QR code in your authenticator app, then confirm with a code",
+  "admin.search_by_action_object_or": "Search by action, object or operator…",
+  "admin.search_by_name_email_or": "Search by name, email or position…",
+  "admin.section": "Section",
+  "admin.secure_connection": "Secure connection",
+  "admin.see_every_conversation_organization_operators": "You see every conversation in the organization. Operators see only conversations of their groups, those without a group and those they are assigned to.",
+  "admin.send_by_email_instead": "Send by email instead",
+  "admin.send_email_again": "Send the email again",
+  "admin.send_link": "Send the link",
+  "admin.send_work_email": "Send to the work email",
+  "admin.set_new_password_sign_chatballs": "Set a new password to sign in to Chatballs.",
+  "admin.setting_up_two_factor_authentication": "Setting up two-factor authentication",
+  "admin.show_password": "Show the password",
+  "admin.sign": "Sign in",
+  "admin.sign_confirmation": "Sign-in confirmation",
+  "admin.signed_with_temporary_password_set": "You signed in with a temporary password. Set a permanent one to continue.",
+  "admin.start": "Start",
+  "admin.status_security": "Status and security",
+  "admin.strong_password": "Strong password",
+  "admin.succeeded": "Succeeded",
+  "admin.system_role": "System role",
+  "admin.system_role_changed": "System role changed",
+  "admin.there_no_active_administrators_transfer": "There are no active administrators. To transfer ownership to an operator, make them an administrator first.",
+  "admin.there_no_groups_yet_so": "There are no groups yet, so the operator will see every conversation. Groups are created under Settings.",
+  "admin.there_no_groups_yet_so_2": "There are no groups yet, so every operator sees every conversation.",
+  "admin.time": "Time",
+  "admin.time_zone": "Time zone",
+  "admin.toggle_totp": "Toggle TOTP",
+  "admin.transfer_ownership": "Transfer ownership",
+  "admin.transferring": "Transferring…",
+  "admin.two_factor_authentication_totp": "Two-factor authentication (TOTP)",
+  "admin.unblock": "Unblock",
+  "admin.unblock_operator": "Unblock the operator",
+  "admin.view_only": "View only",
+  "admin.weak_password": "Weak password",
+  "admin.with_no_groups_operator_sees": "With no groups the operator sees only conversations without a group. Groups can be changed later.",
+  "admin.work_email": "the work email",
+  "admin.work_email_2": "Work email",
+  "admin.work_email_used_sign": "Work email · used to sign in",
+  "admin.works_chat_sees_conversations_their": "Works in chat. Sees conversations of their groups, conversations without a group and those assigned to them.",
+  "admin.wrong_code_attempts_left_2": "Wrong code. Attempts left: 2",
+  "admin.wrong_email_or_password_check": "Wrong email or password. Check the details and try again.",
+  "admin.yesterday": "Yesterday",
+  "ai.action": "ACTION",
+  "ai.active": "active",
+  "ai.add_category": "Add a category",
+  "ai.add_key_under_settings_ai": "Add a key under Settings → AI provider and pick a provider in the Model block. Until then the agent's conversations wait for a person.",
+  "ai.add_knowledge_item": "Add a knowledge item",
+  "ai.add_material_by_hand_or": "Add material by hand or load a batch from YAML. An empty category with nothing nested can be deleted under Manage.",
+  "ai.add_nested_one": "Add a nested one",
+  "ai.agent": "AGENT",
+  "ai.agent_2": "Agent:",
+  "ai.agent_actions": "Agent actions",
+  "ai.agent_answers_customers_first_collects": "The agent answers customers first and collects the conversations into a group",
+  "ai.agent_answers_customers_first_create": "The agent answers customers first. Create your first one",
+  "ai.agent_answers_only_from_selected": "The agent answers only from the selected material: library knowledge and published portal articles.",
+  "ai.agent_cannot_deleted_has_conversations": "This agent cannot be deleted: it has conversations or connections. Detach the connections and close the conversations.",
+  "ai.agent_not_found": "Agent not found",
+  "ai.agent_quotes_title_its_reply": "The agent quotes the title in its reply to the customer — write it as an answer, not as a folder name.",
+  "ai.agent_s_replies": "In the agent's replies",
+  "ai.agent_will_be_deleted": "The agent “{name}” will be deleted for good. Conversations and connections block deletion.",
+  "ai.ai_cannot_reply_no_provider": "AI cannot reply: no provider is selected",
+  "ai.ai_off_agent": "AI is off for this agent",
+  "ai.ai_replies_attached": "AI replies · {count} attached",
+  "ai.all_categories_shown": "all categories are shown",
+  "ai.all_knowledge": "All knowledge",
+  "ai.already_attached_agent": "is already attached to this agent",
+  "ai.any": "Any",
+  "ai.article_meta": "article",
+  "ai.assignment": "Assignment",
+  "ai.attach_agent": "Attach to an agent",
+  "ai.attach_detach_note": "Attaching and detaching happen only through “Attach to an agent”: the operation is atomic and written to the log.",
+  "ai.attachment_agent_hands_link_customer": "attachment · the agent hands the link to the customer",
+  "ai.attachments": "ATTACHMENTS",
+  "ai.attachments_2": "Attachments",
+  "ai.available": "available",
+  "ai.bind": "Bind",
+  "ai.bold": "Bold",
+  "ai.can_switched_off_without_deleting": "can be switched off without deleting",
+  "ai.cannot_delete_because": "Cannot be deleted: {reason}",
+  "ai.cannot_delete_named": "“{name}” cannot be deleted: {reason}. Move its contents out first.",
+  "ai.categories": "CATEGORIES",
+  "ai.categories_do_not_nest_deeper": "Categories do not nest deeper than three levels",
+  "ai.category": "Category",
+  "ai.category_cannot_moved_inside_itself": "A category cannot be moved inside itself.",
+  "ai.category_empty_will_delete": "The category “{name}” is empty and will be deleted.",
+  "ai.category_file_matches_current_one": "the category in the file matches the current one",
+  "ai.category_has_no_items": "The category “{name}” has no knowledge yet",
+  "ai.category_named": "category “{name}”",
+  "ai.category_not_empty": "the category is not empty",
+  "ai.changed_by_bulk_action": "changed by a bulk action",
+  "ai.characters_and_chunks": "{characters} characters · ≈{chunks}",
+  "ai.characters_count": "{count} characters",
+  "ai.chunks": "CHUNKS",
+  "ai.chunks_and_characters": "chunks · {characters} characters",
+  "ai.chunks_rebuilt_at": "{chunks} · rebuilt {date}",
+  "ai.chunks_rebuilt_save_while_rebuild": "Chunks are rebuilt on save. While the rebuild runs, the agent answers from the previous version.",
+  "ai.clear_filters_or_change_query": "Clear the filters or change the query — the material may sit in other categories.",
+  "ai.clear_selection": "Clear the selection",
+  "ai.code": "Code",
+  "ai.connection_already_bound_another_agent": "The connection is already bound to another agent",
+  "ai.copy_as_markdown": "Copy as Markdown",
+  "ai.copy_snippet": "Copy the snippet",
+  "ai.could_not_bind_connection": "Could not bind the connection",
+  "ai.could_not_change_agent_s": "Could not change the agent's knowledge",
+  "ai.could_not_change_ai_status": "Could not change the AI status",
+  "ai.could_not_change_participation_replies": "Could not change participation in replies",
+  "ai.could_not_create_agent": "Could not create the agent",
+  "ai.could_not_delete_agent": "Could not delete the agent",
+  "ai.could_not_delete_attachment": "Could not delete the attachment",
+  "ai.could_not_delete_knowledge_item": "Could not delete the knowledge item",
+  "ai.could_not_detach_connection": "Could not detach the connection",
+  "ai.could_not_import": "Could not import",
+  "ai.could_not_load_agents": "Could not load the agents",
+  "ai.could_not_load_categories": "Could not load the categories",
+  "ai.could_not_load_categories_knowledge": "Could not load the categories and knowledge",
+  "ai.could_not_load_knowledge": "Could not load the knowledge",
+  "ai.could_not_load_knowledge_item": "Could not load the knowledge item",
+  "ai.could_not_load_material_list": "Could not load the material list",
+  "ai.could_not_move_knowledge_item": "Could not move the knowledge item",
+  "ai.could_not_move_knowledge_items": "Could not move the knowledge items",
+  "ai.could_not_read_file": "Could not read the file",
+  "ai.could_not_reindex_knowledge_item": "Could not reindex the knowledge item",
+  "ai.could_not_save_knowledge_item": "Could not save the knowledge item",
+  "ai.could_not_save_selection": "Could not save the selection",
+  "ai.could_not_upload_file": "Could not upload {name}",
+  "ai.count_create": "create {count}",
+  "ai.count_error": "error {count}",
+  "ai.count_update": "update {count}",
+  "ai.create": "create",
+  "ai.create_2": "Create",
+  "ai.created": "Created:",
+  "ai.created_on": "created {date}",
+  "ai.creating": "Creating…",
+  "ai.customers_reach_agent_through_these": "Customers reach the agent through these. One connection, one agent.",
+  "ai.daily_limit": "Daily limit",
+  "ai.delete_agent": "Delete the agent",
+  "ai.delete_agent_2": "Delete the agent?",
+  "ai.delete_attachment": "Delete the attachment",
+  "ai.delete_category": "Delete the category",
+  "ai.delete_knowledge_item": "Delete the knowledge item",
+  "ai.delete_knowledge_item_2": "Delete the knowledge item?",
+  "ai.delete_selected_knowledge_items": "Delete the selected knowledge items?",
+  "ai.detach_from_agent": "Detach from the agent",
+  "ai.discard_edits": "Discard the edits",
+  "ai.document": "DOCUMENT",
+  "ai.document_category_path_empty_level": "Document #{index}: “categoryPath” has an empty level",
+  "ai.document_category_path_list": "Document #{index}: “categoryPath” must be a non-empty list",
+  "ai.document_content_empty": "Document #{index}: the required field “content” is empty",
+  "ai.document_must_be_object": "Document #{index}: must be an object",
+  "ai.document_title_empty": "Document #{index}: the required field “title” is empty",
+  "ai.documents_must_non_empty_list": "documents must be a non-empty list",
+  "ai.drag": "Drag",
+  "ai.drag_files_here": "Drag files here",
+  "ai.drop_attach_item": "Drop it to attach it to the item",
+  "ai.editor_only": "Editor only",
+  "ai.edits_not_saved_chunks_rebuilt": "The edits are not saved — chunks are rebuilt after you press Save",
+  "ai.empty": "empty",
+  "ai.empty_item_never_reaches_replies": "An empty item never reaches replies.",
+  "ai.error": "error",
+  "ai.everything_saved": "Everything is saved",
+  "ai.example_calmly_politely_formal_address": "For example: calmly and politely, formal address",
+  "ai.example_do_not_quote_prices": "For example: do not quote prices, refer to a consultant",
+  "ai.example_front_desk": "For example: Front desk",
+  "ai.file_becomes_attachment_link_text": "The file becomes an attachment and a link in the text, which the agent hands to the customer. PNG, JPG, PDF, DOCX, XLSX · up to 25 MB",
+  "ai.file_not_parsed": "{size} · the file was not parsed",
+  "ai.file_parsed_before_anything_applied": "The file is parsed before anything is applied: you see what will be created, what updated and where the error is.",
+  "ai.file_parsed_ok": "{size} · {count} · parsed with no format errors",
+  "ai.fragment_number": "Chunk {number}",
+  "ai.fragments_note": "The agent answers with matching chunks rather than the whole text. On save this item will be split into {chunks}.",
+  "ai.free": "Free",
+  "ai.free_connection": "Free connection",
+  "ai.give_title_category": "Give it a title and a category",
+  "ai.group_decides_which_operators_see": "The group decides which operators see the agent's conversations; without a group they are visible to everyone.",
+  "ai.has_nested_categories": "it has nested categories",
+  "ai.heading_1": "Heading 1",
+  "ai.heading_2": "Heading 2",
+  "ai.helps_search_agent": "· helps search and the agent",
+  "ai.how_agent_quotes": "How the agent quotes it",
+  "ai.how_agent_will_answer": "HOW THE AGENT WILL ANSWER",
+  "ai.how_agent_will_answer_2": "How the agent will answer",
+  "ai.how_should_speak": "How it should speak",
+  "ai.import_documents": "Import {count}",
+  "ai.import_finished": "Import finished",
+  "ai.import_never_creates_categories_implicitly": "Import never creates categories implicitly: a document with a non-existent",
+  "ai.import_path_tail": "is rejected on its own, the rest are applied. Without a path a document lands in “No category”.",
+  "ai.index_up_date": "The index is up to date",
+  "ai.indexing": "INDEXING",
+  "ai.insert_link_into_text": "Insert a link into the text",
+  "ai.instructions": "instructions",
+  "ai.instructions_2": "Instructions",
+  "ai.internal_material": "INTERNAL MATERIAL",
+  "ai.invalid_yaml": "Invalid YAML",
+  "ai.invalid_yaml_reason": "Invalid YAML: {reason}",
+  "ai.italic": "Italic",
+  "ai.item_and_files_deleted": "“{title}” and its attachments will be deleted. Agents it is attached to will stop using it in replies.",
+  "ai.item_attached_no_agent_so": "This item is attached to no agent, so it is never used in replies.",
+  "ai.items_and_files_deleted": "{count} and their attachments will be deleted. Agents they are attached to will stop using them in replies.",
+  "ai.knowledge": "Knowledge",
+  "ai.knowledge_item": "KNOWLEDGE ITEM",
+  "ai.knowledge_item_title": "Knowledge item title",
+  "ai.knowledge_item_title_2": "Knowledge item title",
+  "ai.knowledge_item_title_without_description": "Knowledge item title without a description",
+  "ai.library_lead": "Material for AI agents: policies, price lists, scripts. An agent answers only from switched-on knowledge attached to it. Customers never see it — public material lives in portals.",
+  "ai.library_note": "{count} · {shown} shown · the agent answers only from switched-on, attached ones",
+  "ai.link": "Link",
+  "ai.link_text": "· link in the text",
+  "ai.links_go_out_agent_s": "links go out in the agent's reply",
+  "ai.list": "List",
+  "ai.manage": "Manage",
+  "ai.material_import": "Material import",
+  "ai.missing_category_path": "there is no category “{name}” — import never creates categories. Create it or drop the last level of the path.",
+  "ai.move": "Move",
+  "ai.move_category": "Move to a category",
+  "ai.name_group_all_takes_start": "A name and a group are all it takes to start. Instructions, knowledge and connections are set later on the card.",
+  "ai.name_unique_within_its_parent": "The name is unique within its parent.",
+  "ai.no_agents_yet": "No agents yet.",
+  "ai.no_ai": "no AI",
+  "ai.no_ai_2": "No AI",
+  "ai.no_ai_knowledge_not_used": "No AI — knowledge is not used",
+  "ai.no_attachments": "No attachments.",
+  "ai.no_category_system_one_cannot": "“No category” is a system one: it cannot be renamed or deleted.",
+  "ai.no_conversations": "no conversations",
+  "ai.no_file_selected": "No file selected",
+  "ai.no_knowledge_attached_so_agent": "No knowledge is attached, so the agent answers from instructions alone. Pick articles from the library or a support portal.",
+  "ai.no_knowledge_item_selected": "No knowledge item selected",
+  "ai.no_knowledge_yet": "No knowledge yet",
+  "ai.not_attached": "not attached",
+  "ai.not_attached_agent": "is not attached to this agent",
+  "ai.not_checked": "Not checked",
+  "ai.not_given": "not given",
+  "ai.not_replies": "not in replies",
+  "ai.not_selected": "Not selected",
+  "ai.not_used_replies": "Not used in replies",
+  "ai.note": "NOTE",
+  "ai.nothing_selected": "nothing selected",
+  "ai.numbered_list": "Numbered list",
+  "ai.off": "Off",
+  "ai.one_step_instructions_model_knowledge": "One step. Instructions, model, knowledge and connections come later, on the agent card.",
+  "ai.only_empty_category_with_nothing": "Only an empty category with nothing nested can be deleted.",
+  "ai.open": "Open",
+  "ai.open_knowledge_item": "Open the knowledge item",
+  "ai.open_settings": "Open the settings",
+  "ai.operation_atomic_if_any_identifier": "The operation is atomic: if any identifier is unavailable, nothing changes. Requires the right",
+  "ai.or": "or",
+  "ai.paste_before_lt_body_gt": "Paste it before &lt;/body&gt; on your site",
+  "ai.persona": "persona",
+  "ai.pick_another_file": "Pick another file",
+  "ai.pick_file": "Pick a file",
+  "ai.pick_provider": "pick a provider",
+  "ai.pick_them_from_disk": "pick them from disk",
+  "ai.portal_named": "Portal · {name}",
+  "ai.preview": "Preview",
+  "ai.preview_of": "PREVIEW · {what}",
+  "ai.preview_only": "Preview only",
+  "ai.provider": "Provider",
+  "ai.provider_key_lives_under_settings": "The provider key lives under Settings → AI provider. The model is chosen from the provider's catalogue.",
+  "ai.quote": "Quote",
+  "ai.reindex": "Reindex",
+  "ai.rename": "Rename",
+  "ai.replies": "In replies:",
+  "ai.replies_2": "IN REPLIES",
+  "ai.rules": "Rules",
+  "ai.save_reindex": "Save and reindex",
+  "ai.saving": "Saving…",
+  "ai.search_by_title": "Search by title",
+  "ai.search_by_title_description": "Search by title and description",
+  "ai.select": "Select",
+  "ai.select_every_knowledge_item_page": "Select every knowledge item on the page",
+  "ai.select_item": "Select “{title}”",
+  "ai.select_knowledge": "Select knowledge",
+  "ai.selected": "selected",
+  "ai.selected_category_note": "{count} selected. A category decides placement in the tree and does not affect the agent's replies.",
+  "ai.selected_one_agent_note": "{count} selected. One agent per operation, so it is clear what actually changed.",
+  "ai.short_description": "Short description",
+  "ai.short_description_optional": "Short description (optional)",
+  "ai.side_by_side": "Side by side",
+  "ai.skips_summary": "{skipped} of {total} will be skipped:",
+  "ai.skips_tail": "The agent's knowledge will not change for those.",
+  "ai.start_ai": "Start AI",
+  "ai.stop_ai": "Stop AI",
+  "ai.switch_off_replies": "Switch off in replies",
+  "ai.switch_replies": "Switch on in replies",
+  "ai.switched_off_item_never_reaches": "a switched-off item never reaches retrieval",
+  "ai.switched_off_replies": "is switched off in replies",
+  "ai.system": "system",
+  "ai.system_category": "system category",
+  "ai.system_category_cannot_renamed": "A system category cannot be renamed",
+  "ai.system_prompt_assembled_from_three": "The system prompt is assembled from three parts in this order",
+  "ai.table": "Table",
+  "ai.template": "Template",
+  "ai.template_content": "The main text of the knowledge item.",
+  "ai.template_description": "Short description (optional)",
+  "ai.template_title": "Knowledge item title",
+  "ai.template_title_no_description": "Knowledge item title without a description",
+  "ai.text": "Text",
+  "ai.text_preview": "Text and preview",
+  "ai.there_no_agents_yet_create": "There are no agents yet — create one to attach knowledge to it.",
+  "ai.there_unsaved_changes_they_take": "There are unsaved changes — they take effect in the runtime at once",
+  "ai.there_unsaved_edits": "There are unsaved edits",
+  "ai.title_matched_text_will_replaced": "the title matched — the text will be replaced and the chunks rebuilt",
+  "ai.today": "today",
+  "ai.tone": "tone",
+  "ai.top_level_category": "Top-level category",
+  "ai.top_level_object_with_documents": "A top-level object with a documents key is expected",
+  "ai.tree_up_three_levels_deep": "A tree up to three levels deep. Drag a row to change its parent or its order.",
+  "ai.turn": "Turn on",
+  "ai.turn_agent": "Turn the agent on",
+  "ai.turn_agent_off": "Turn the agent off",
+  "ai.turn_off": "Turn off",
+  "ai.unbind": "Unbind",
+  "ai.unchanged": "· Unchanged:",
+  "ai.undo": "Undo",
+  "ai.untitled": "Untitled",
+  "ai.up_25_mb": "· up to 25 MB",
+  "ai.update": "update",
+  "ai.updated": "· Updated:",
+  "ai.updated_2": "UPDATED",
+  "ai.updated_by_at": "updated by {name} · {date}",
+  "ai.updated_on": "updated {date}",
+  "ai.used_replies": "Used in replies",
+  "ai.what_will_happen": "What will happen",
+  "ai.who_what_does": "Who it is and what it does",
+  "ai.widget_embed_snippet": "Widget embed snippet",
+  "ai.will_attached_after_saving": "will be attached after saving",
+  "ai.will_land_no_category": "will land in “No category”",
+  "ai.without_group_conversations_visible_everyone": "Without a group the conversations are visible to everyone",
+  "ai.working_rules": "Working rules",
+  "ai.yaml_import": "YAML import",
+  "ai.yaml_shaped_as_documents_title": "YAML shaped as documents: [{ title, description?, content, categoryPath? }]",
+  "common.action": "Action",
+  "common.actions": "Actions",
+  "common.actions_for": "Actions: {name}",
+  "common.active_sessions": "Active sessions",
+  "common.administrator": "Administrator",
+  "common.agent": "Agent",
+  "common.agents": "Agents",
+  "common.agents_2": "AGENTS",
+  "common.all": "All",
+  "common.appearance": "Appearance",
+  "common.archive": "Archive",
+  "common.assignee": "Assignee",
+  "common.at_least_10_characters": "At least 10 characters",
+  "common.at_least_10_characters_long": "At least 10 characters long",
+  "common.attach": "Attach",
+  "common.attach_file": "Attach a file",
+  "common.audit": "Audit",
+  "common.back_sign": "Back to sign-in",
+  "common.cancel": "Cancel",
+  "common.categories": "Categories",
+  "common.category": "CATEGORY",
+  "common.channels": "Channels",
+  "common.chat": "Chat",
+  "common.city": "City",
+  "common.close": "Close",
+  "common.company": "Company",
+  "common.connected": "Connected",
+  "common.connections": "Connections",
+  "common.contact": "Contact",
+  "common.contacts": "Contacts",
+  "common.contains_digit": "Contains a digit",
+  "common.conversations": "Conversations",
+  "common.copied": "Copied",
+  "common.copy": "Copy",
+  "common.copy_clipboard": "Copy to clipboard",
+  "common.could_not_complete_action": "Could not complete the action",
+  "common.could_not_save": "Could not save",
+  "common.delete": "Delete",
+  "common.description": "Description",
+  "common.detach": "Detach",
+  "common.done": "Done",
+  "common.download": "Download",
+  "common.draft": "Draft",
+  "common.edit": "Edit",
+  "common.edit_item": "Edit item",
+  "common.emoji": "Emoji",
+  "common.error": "Error",
+  "common.full_access": "Full access",
+  "common.group": "Group",
+  "common.groups": "Groups",
+  "common.hide": "Hide",
+  "common.history": "History",
+  "common.integrations": "Integrations",
+  "common.just_now": "just now",
+  "common.knowledge_base": "Knowledge base",
+  "common.letters_special_character": "Letters and a special character",
+  "common.model": "Model",
+  "common.more": "More",
+  "common.move_archive": "Move to archive",
+  "common.n_of_m": "{selected} of {total}",
+  "common.name": "Name",
+  "common.never_saved_yet": "Never saved yet",
+  "common.new_password": "New password",
+  "common.no_group": "No group",
+  "common.nothing_found": "Nothing found",
+  "common.notifications": "Notifications",
+  "common.object": "Object",
+  "common.off": "Off",
+  "common.off_2": "Off",
+  "common.on": "On",
+  "common.on_2": "On",
+  "common.operator": "Operator",
+  "common.operators": "Operators",
+  "common.owner": "Owner",
+  "common.password": "Password",
+  "common.password_requirements": "PASSWORD REQUIREMENTS",
+  "common.passwords_do_not_match": "The passwords do not match",
+  "common.phone": "Phone",
+  "common.photo": "Photo",
+  "common.portals": "Portals",
+  "common.position": "Position",
+  "common.profile": "Profile",
+  "common.publish": "Publish",
+  "common.range_of": "{from}–{to} of {total}",
+  "common.remove": "Remove",
+  "common.remove_file": "Remove the file",
+  "common.repeat_new_password": "Repeat the new password",
+  "common.reply": "Reply",
+  "common.request_failed": "Request failed",
+  "common.reset": "Reset",
+  "common.role": "Role",
+  "common.save": "Save",
+  "common.saving": "Saving",
+  "common.selected_count": "{count} selected",
+  "common.selected_of": "{selected} of {total} selected",
+  "common.sending": "Sending…",
+  "common.settings": "Settings",
+  "common.show": "Show",
+  "common.shown_of": "Showing {shown} of {total}",
+  "common.shown_of_page": "Showing {shown} of {total} · {size} per page",
+  "common.sign_out": "Sign out",
+  "common.status": "Status",
+  "common.status_2": "STATUS",
+  "common.title": "Title",
+  "common.today": "Today",
+  "common.try_again": "Try again",
+  "common.upload": "Upload",
+  "common.uploading_percent": "uploading… {percent} %",
+  "common.web_widget": "Web widget",
+  "common.web_widget_2": "Web widget",
+  "common.yesterday": "yesterday",
+  "common.you": "· you",
+  "common.you_suffix": " · you",
+  "conversations.active_call": "Active call",
+  "conversations.add": "Add",
+  "conversations.ai_handling_conversation_message_takes": "AI is handling this conversation. Your message takes it over and AI stops replying",
+  "conversations.ai_replying": "AI is replying",
+  "conversations.ai_transcript": "AI transcript ·",
+  "conversations.allow_device_access_browser_settings": "Allow device access in the browser settings and try again.",
+  "conversations.another_operator_handling": "Another operator is handling it",
+  "conversations.another_operator_handling_conversation": "Another operator is handling this conversation",
+  "conversations.audio_call": "Audio call",
+  "conversations.audio_call_2": "audio call",
+  "conversations.back_conversation_list": "Back to the conversation list",
+  "conversations.by_last_message": "By last message",
+  "conversations.by_waiting_time": "By waiting time",
+  "conversations.call_again": "Call again",
+  "conversations.call_back": "Call back",
+  "conversations.call_cancelled": "Call cancelled",
+  "conversations.call_declined": "Call declined",
+  "conversations.call_declined_by": "{name} declined the call.",
+  "conversations.call_ended": "Call ended",
+  "conversations.call_unanswered_by": "{name} did not answer the call.",
+  "conversations.camera_off": "The camera is off",
+  "conversations.camera_unavailable": "The camera is unavailable",
+  "conversations.cancel_recording": "Cancel the recording",
+  "conversations.caption_file_optional": "Caption for the file (optional)…",
+  "conversations.check_again": "Check again",
+  "conversations.check_camera_microphone": "Check the camera and microphone",
+  "conversations.check_internet_connection_try_again": "Check your internet connection and try again.",
+  "conversations.close_conversation": "Close the conversation",
+  "conversations.close_esc": "Close · Esc",
+  "conversations.closed_by": "Closed · {name}",
+  "conversations.collapse": "Collapse",
+  "conversations.connecting": "Connecting",
+  "conversations.connecting_call": "Connecting the call",
+  "conversations.conversation": "Conversation",
+  "conversations.conversation_actions": "Conversation actions",
+  "conversations.conversation_closed": "The conversation is closed",
+  "conversations.conversation_context": "Conversation context",
+  "conversations.conversation_has_ended": "The conversation has ended.",
+  "conversations.conversation_list_width": "Conversation list width",
+  "conversations.conversation_moves_archive_leaves_lists": "The conversation moves to the archive and leaves the lists. Only administrators see the archive.",
+  "conversations.conversation_will_closed_replies_stay": "The conversation will be closed for replies and stay in history marked “Spam”.",
+  "conversations.conversation_without_group_visible_every": "A conversation without a group is visible to every operator.",
+  "conversations.conversations_appear_once_customers_write": "Conversations appear once customers write to your agent",
+  "conversations.could_not_add_label": "Could not add the label",
+  "conversations.could_not_cancel_call": "Could not cancel the call",
+  "conversations.could_not_connect": "Could not connect",
+  "conversations.could_not_delete_conversation": "Could not delete the conversation",
+  "conversations.could_not_load_conversation": "Could not load the conversation",
+  "conversations.could_not_load_conversation_history": "Could not load the conversation history",
+  "conversations.could_not_load_conversation_list": "Could not load the conversation list",
+  "conversations.could_not_load_earlier_messages": "Could not load the earlier messages",
+  "conversations.could_not_load_more_conversations": "Could not load more conversations",
+  "conversations.could_not_play": "Could not play it",
+  "conversations.could_not_refresh_conversation_history": "Could not refresh the conversation history",
+  "conversations.could_not_refresh_conversation_list": "Could not refresh the conversation list",
+  "conversations.could_not_request_call": "Could not request the call",
+  "conversations.could_not_send_message": "Could not send the message",
+  "conversations.could_not_send_voice_message": "Could not send the voice message",
+  "conversations.could_not_transcribe": "Could not transcribe it",
+  "conversations.customer": "Customer",
+  "conversations.customer_waiting_message_assigns_conversation": "The customer is waiting. Your message assigns the conversation to you",
+  "conversations.delete_conversation": "Delete the conversation",
+  "conversations.delete_conversation_2": "Delete the conversation?",
+  "conversations.edit_note": "Edit the note",
+  "conversations.email_content": "Email content",
+  "conversations.establishing_secure_connection": "Establishing a secure connection…",
+  "conversations.file": "File",
+  "conversations.file_named": "File · {name}",
+  "conversations.file_over_20_mb": "The file is over 20 MB",
+  "conversations.file_unavailable": "The file “{name}” is unavailable",
+  "conversations.finish_current_call_first": "End the current {kind} first",
+  "conversations.g": "G",
+  "conversations.go_ahead": "Go ahead",
+  "conversations.guest": "Guest",
+  "conversations.guest_number": "Guest {id}",
+  "conversations.hand_back_ai": "Hand back to AI",
+  "conversations.handled_by": "{name} is handling the conversation",
+  "conversations.handled_by_short": "{name} is handling it",
+  "conversations.handling": "You are handling it",
+  "conversations.hide_list": "Hide the list",
+  "conversations.high": "High",
+  "conversations.history_kept_next_time_customer": "The history is kept. The next time the customer writes, a new conversation starts.",
+  "conversations.incoming_call": "Incoming call",
+  "conversations.internal_note_customer_does_not": "An internal note — the customer does not see it",
+  "conversations.invitation_was_cancelled": "The invitation was cancelled.",
+  "conversations.labels": "Labels",
+  "conversations.low": "Low",
+  "conversations.mark_as_spam": "Mark as spam",
+  "conversations.mark_conversation_as_spam": "Mark the conversation as spam?",
+  "conversations.medium": "Medium",
+  "conversations.message": "Message…",
+  "conversations.microphone_off": "Your microphone is off",
+  "conversations.mine": "Mine",
+  "conversations.missed_call": "Missed call",
+  "conversations.mode": "Mode",
+  "conversations.move_group": "Move to a group",
+  "conversations.name_cannot_empty": "The name cannot be empty",
+  "conversations.name_or_email": "Name or email",
+  "conversations.new_label": "New label",
+  "conversations.no_access_camera_microphone": "No access to the camera and microphone",
+  "conversations.no_access_microphone": "No access to the microphone",
+  "conversations.no_conversations_found": "No conversations found",
+  "conversations.no_matching_templates": "No matching templates",
+  "conversations.no_messages_yet": "No messages yet",
+  "conversations.no_notes": "No notes",
+  "conversations.nobody_answered_time_try_calling": "Nobody answered in time. Try calling again.",
+  "conversations.not_set": "Not set",
+  "conversations.note": "Note",
+  "conversations.only_assignee_can_reply_take": "Only the assignee can reply. Take the conversation to carry on yourself.",
+  "conversations.outgoing_call": "Outgoing call",
+  "conversations.pause": "Pause",
+  "conversations.pick_conversation": "Pick a conversation",
+  "conversations.play": "Play",
+  "conversations.priority": "Priority",
+  "conversations.reconnecting": "Reconnecting",
+  "conversations.record_voice_message": "Record a voice message",
+  "conversations.recording_esc_cancels_enter_sends": "Recording. Esc cancels, Enter sends",
+  "conversations.remove_label": "Remove the “{name}” label",
+  "conversations.reply_templates": "Reply templates · /",
+  "conversations.return_queue": "Return to the queue",
+  "conversations.search_by_contact_or_message": "Search by contact or message…",
+  "conversations.send": "Send",
+  "conversations.sending_invitation": "Sending the invitation",
+  "conversations.show_earlier_messages": "Show earlier messages",
+  "conversations.show_list": "Show the list",
+  "conversations.sorting": "Sorting",
+  "conversations.sorting_by_last_message": "Sorting: by last message",
+  "conversations.sorting_by_waiting_time": "Sorting: by waiting time",
+  "conversations.started": "Started",
+  "conversations.take_conversation": "Take the conversation",
+  "conversations.templates": "Templates",
+  "conversations.transcribe": "Transcribe",
+  "conversations.transcribing": "Transcribing…",
+  "conversations.type_message_shift_enter_line": "Type a message… Shift+Enter for a line break, “/” for a reply template",
+  "conversations.unassigned": "Unassigned",
+  "conversations.update_browser_or_open_link": "Update your browser or open the link in Chrome, Safari or Edge.",
+  "conversations.video_call": "video call",
+  "conversations.video_calls_not_supported": "Video calls are not supported",
+  "conversations.voice_message_duration": "Voice message · {duration}",
+  "conversations.wait_timed_out": "The wait timed out",
+  "conversations.waiting_answer": "Waiting for an answer",
+  "conversations.waiting_for_operator": "Waiting for an operator",
+  "conversations.waiting_for_person_since": "Waiting for a person · {waited}",
+  "conversations.waiting_person": "Waiting for a person",
+  "conversations.without_video": "Without video",
+  "plural.agents": { one: "{count} agent", other: "{count} agents" },
+  "plural.articles": { one: "{count} article", other: "{count} articles" },
+  "plural.categories": { one: "{count} category", other: "{count} categories" },
+  "plural.chunks": { one: "{count} chunk", other: "{count} chunks" },
+  "plural.conversations": { one: "{count} conversation", other: "{count} conversations" },
+  "plural.devices": { one: "{count} device", other: "{count} devices" },
+  "plural.documents": { one: "{count} document", other: "{count} documents" },
+  "plural.events": { one: "{count} event", other: "{count} events" },
+  "plural.knowledge": { one: "{count} knowledge item", other: "{count} knowledge items" },
+  "plural.knowledge_noun": { one: "knowledge item", other: "knowledge items" },
+  "plural.nested": { one: "{count} nested", other: "{count} nested" },
+  "plural.open_conversations": { one: "{count} open conversation", other: "{count} open conversations" },
+  "plural.paragraphs": { one: "{count} paragraph", other: "{count} paragraphs" },
+  "plural.portals": { one: "{count} portal", other: "{count} portals" },
+  "plural.sections": { one: "{count} section", other: "{count} sections" },
+  "plural.sessions_ended": { one: "{count} session ended", other: "{count} sessions ended" },
+  "portals.add_section": "Add a section",
+  "portals.address": "Address:",
+  "portals.address_domain": "Address and domain",
+  "portals.address_installation": "Address on this installation",
+  "portals.address_installation_2": "address on this installation",
+  "portals.administrator_has_not_set_installation": "The administrator has not set this installation's IP",
+  "portals.all_material": "All material",
+  "portals.all_sections": "All sections",
+  "portals.archive_note": "An archived portal stops opening at its public address and its material disappears from the agent's replies. Nothing is deleted: the portal can be restored.",
+  "portals.archived": "Archived",
+  "portals.article": "ARTICLE",
+  "portals.article_2": "In this article",
+  "portals.article_attachment": "· article attachment",
+  "portals.article_category_path_required": "Article #{index}: the required field “categoryPath” is a non-empty list of sections",
+  "portals.article_content_empty": "Article #{index}: the required field “content” is empty",
+  "portals.article_contents": "Article contents",
+  "portals.article_files": "ARTICLE FILES",
+  "portals.article_import": "Article import",
+  "portals.article_must_be_object": "Article #{index}: must be an object",
+  "portals.article_not_found": "Article not found",
+  "portals.article_section_empty": "Article #{index}: section #{segment} is empty",
+  "portals.article_slug_empty": "Article #{index}: the required field “slug” is empty",
+  "portals.article_title": "Article title",
+  "portals.article_title_empty": "Article #{index}: the required field “title” is empty",
+  "portals.article_will_disappear_from_public": "The article will disappear from the public portal.",
+  "portals.articles_match_address_creates_new": "articles. A match on the address creates a new version.",
+  "portals.articles_must_non_empty_list": "articles must be a non-empty list",
+  "portals.back_knowledge_base": "Back to the knowledge base",
+  "portals.base_domain_hint": "is set by the administrator at install time and is the same for every portal of this installation. The address is part of article links, so old links stop working once it changes.",
+  "portals.base_help_center_look_light": "The base Help Center look: a light ground and an ink accent.",
+  "portals.basics": "Basics",
+  "portals.change": "change",
+  "portals.change_conflicts_with_current_data": "The change conflicts with the current data",
+  "portals.changes_reach_public_pages_as": "Changes reach the public pages as soon as they are saved.",
+  "portals.check_address_or_ask_organization": "Check the address or ask your organization's administrator.",
+  "portals.check_dns": "Check DNS",
+  "portals.check_portal_name_address": "Check the portal name and address.",
+  "portals.check_value": "Check the value",
+  "portals.classic": "Classic",
+  "portals.colour_scheme": "Colour scheme",
+  "portals.copy_public_link": "Copy the public link",
+  "portals.could_not_change_agent_s": "Could not change the agent's articles",
+  "portals.could_not_change_article": "Could not change the article",
+  "portals.could_not_change_portal_status": "Could not change the portal status",
+  "portals.could_not_change_sections": "Could not change the sections",
+  "portals.could_not_check_domain": "Could not check the domain",
+  "portals.could_not_create_portal_try": "Could not create the portal. Try again later.",
+  "portals.could_not_delete_file": "Could not delete the file",
+  "portals.could_not_import_articles": "Could not import the articles",
+  "portals.could_not_load_article": "Could not load the article",
+  "portals.could_not_load_articles": "Could not load the articles",
+  "portals.could_not_load_portals": "Could not load the portals",
+  "portals.could_not_move_portal_archive": "Could not move the portal to the archive",
+  "portals.could_not_publish_article": "Could not publish the article",
+  "portals.could_not_save_appearance": "Could not save the appearance",
+  "portals.could_not_save_article": "Could not save the article",
+  "portals.could_not_save_domain": "Could not save the domain",
+  "portals.could_not_save_settings": "Could not save the settings",
+  "portals.could_not_save_web_widget": "Could not save the web widget",
+  "portals.could_not_send_feedback_try": "Could not send the feedback. Try again.",
+  "portals.could_not_turn_domain_off": "Could not turn the domain off",
+  "portals.could_not_upload_file": "Could not upload {name}",
+  "portals.create_article_first_files_attach": "Create the article first — files attach to an existing article",
+  "portals.create_first_support_portal": "Create your first support portal",
+  "portals.create_portal": "Create the portal",
+  "portals.create_section": "Create a section",
+  "portals.creating": "Creating…",
+  "portals.current_state": "Current state",
+  "portals.custom_domain": "Custom domain",
+  "portals.custom_domain_2": "custom domain",
+  "portals.custom_domain_off": "The custom domain is off",
+  "portals.custom_domain_state": "custom domain · {state}",
+  "portals.delete_file": "Delete the file",
+  "portals.did_not_help": "did not help",
+  "portals.dns_update_takes_up_24": "a DNS update takes up to 24 hours",
+  "portals.do_not_show": "Do not show it",
+  "portals.domain": "Domain",
+  "portals.domain_has_not_been_checked": "The domain has not been checked yet",
+  "portals.domain_no_extra_setup": "Nothing else is needed: the domain is yours and so is the installation — the check only looks at whether the record points to this server, and issues a certificate.",
+  "portals.domain_points_here": "The domain points here",
+  "portals.domain_points_here_checked": "The domain points here · checked {date}",
+  "portals.domain_saved_add_record_check": "Domain saved. Add an A record and check DNS.",
+  "portals.download_template": "Download the template",
+  "portals.draft": "draft ·",
+  "portals.draft_autosaved_at": "Draft autosaved at {time}",
+  "portals.draft_prefix": "draft · ",
+  "portals.draft_revision": "draft {revision}",
+  "portals.drop_add_article": "Drop it to add it to the article",
+  "portals.english": "English",
+  "portals.example_help_centre": "For example, Help centre",
+  "portals.file": "FILE",
+  "portals.files_article": "Files in the article",
+  "portals.files_article_2": "Files for the article",
+  "portals.help": "Help",
+  "portals.helpful": "helpful",
+  "portals.helps_make_knowledge_base_more": "It helps make the knowledge base more useful.",
+  "portals.how_looks_customer": "How it looks to a customer",
+  "portals.image_goes_into_text_other": "An image goes into the text; other files attach to the article. PNG, JPG, WebP, PDF, DOCX · up to 25 MB",
+  "portals.immutable": "immutable",
+  "portals.import": "To import:",
+  "portals.import_2": "Import",
+  "portals.import_articles_from_yaml": "Import articles from YAML",
+  "portals.importing": "Importing…",
+  "portals.insert_image": "Insert an image",
+  "portals.insert_into_text": "Insert into the text",
+  "portals.inserted_into_text": "· inserted into the text",
+  "portals.invalid_yaml": "Invalid YAML",
+  "portals.ip_of_installation": "{value} · this installation's IP",
+  "portals.knowledge_base_support": "Knowledge base and support",
+  "portals.language": "Language",
+  "portals.language_2": "Language:",
+  "portals.language_3": "LANGUAGE",
+  "portals.language_filled_new_articles_articles": "The language filled in for new articles. Articles in other languages stay as they are.",
+  "portals.library_note": "{count} · {shown} shown · the agent answers only from published ones",
+  "portals.locale_created": "{locale} · created {date}",
+  "portals.lowercase_latin_letters_digits_hyphens": "Lowercase Latin letters, digits and hyphens. The base domain",
+  "portals.manage_sections": "Manage sections",
+  "portals.material": "Material",
+  "portals.material_2": "MATERIAL",
+  "portals.move_article_archive": "Move the article to the archive?",
+  "portals.move_portal_archive": "Move the portal to the archive?",
+  "portals.name": "NAME",
+  "portals.navigation": "Navigation",
+  "portals.new_article": "New article",
+  "portals.new_article_not_saved": "New article · not saved",
+  "portals.new_support_portal": "New support portal",
+  "portals.no_article_did_not_help": "No, the article did not help",
+  "portals.no_reader_ratings_yet": "No reader ratings yet",
+  "portals.not_checked": "not checked",
+  "portals.not_enough_rights_action": "Not enough rights for this action",
+  "portals.not_published": "not published",
+  "portals.open": "Open",
+  "portals.open_as_visitor": "Open as a visitor",
+  "portals.open_material": "Open the material",
+  "portals.open_portal": "Open the portal",
+  "portals.open_portal_new_tab": "Open the portal in a new tab",
+  "portals.portal": "PORTAL",
+  "portals.portal_address": "Portal address",
+  "portals.portal_its_material_become_unavailable": "The portal and its material become unavailable to visitors until it is restored.",
+  "portals.portal_name": "Portal name",
+  "portals.portal_preview": "Portal preview",
+  "portals.portal_public_help_centre_with": "A portal is a public help centre with instructions and answers for customers.",
+  "portals.portal_public_page_with_instructions": "A portal is a public page with instructions and answers to common questions. A customer reads an article and, if the answer is not there, writes into the chat right from the page.",
+  "portals.portal_s_name_public_address": "The portal's name, public address and material language.",
+  "portals.portal_will_open_at_company": "The portal will open at your company's address. The installation address keeps working.",
+  "portals.portals_note": "{count} · archived ones are listed last",
+  "portals.preview_theme": "PREVIEW · PORTAL THEME {theme}",
+  "portals.primary_language": "Primary language",
+  "portals.public_address": "PUBLIC ADDRESS",
+  "portals.public_chat_appears_every_portal": "The public chat appears on every portal page.",
+  "portals.public_knowledge_bases_customers": "Public knowledge bases for customers.",
+  "portals.public_knowledge_bases_customers_every": "Public knowledge bases for customers. Every portal has its own address, appearance and material.",
+  "portals.publish_portal": "Publish the portal",
+  "portals.publish_portal_2": "Publish the portal?",
+  "portals.publish_selected_version": "Publish the selected version?",
+  "portals.published": "Published",
+  "portals.published_2": "published",
+  "portals.published_articles_will_become_available": "Published articles will become available at the public address.",
+  "portals.published_at_lower": "published {date}",
+  "portals.publishing_archive": "Publishing and archive",
+  "portals.publishing_opens_material_visitors_archive": "Publishing opens the material to visitors; the archive hides the portal entirely.",
+  "portals.publishing_picks_one_revision_visitors": "Publishing picks one revision. Visitors see only the published one.",
+  "portals.ratings": "RATINGS",
+  "portals.reader_ratings": "READER RATINGS",
+  "portals.record_at_domain_registrar": "The record at your domain registrar",
+  "portals.record_not_found": "Record not found",
+  "portals.restore_from_archive": "Restore from the archive",
+  "portals.resulting_link": "Resulting link",
+  "portals.revision": "REVISION",
+  "portals.revision_draft": "Revision {revision} · draft",
+  "portals.revision_number": "Revision {revision}",
+  "portals.revision_published": "Revision {revision} · published",
+  "portals.russian": "Russian",
+  "portals.russian_2": "Russian",
+  "portals.save_appearance": "Save the appearance",
+  "portals.save_domain": "Save the domain",
+  "portals.save_draft": "Save the draft",
+  "portals.save_settings": "Save the settings",
+  "portals.save_widget": "Save the widget",
+  "portals.saved_at_lower": "saved {date}",
+  "portals.search_articles": "Search the articles",
+  "portals.search_articles_2": "Search the articles...",
+  "portals.search_by_name_address": "Search by name and address",
+  "portals.search_knowledge_base": "Search the knowledge base",
+  "portals.search_query": "Search: “{query}”",
+  "portals.search_results": "Search results",
+  "portals.section": "SECTION",
+  "portals.section_can_only_deleted_once": "A section can only be deleted once the sections and articles inside it have been moved out.",
+  "portals.section_decides_where_articles_sit": "A section decides where articles sit on the public portal",
+  "portals.sections": "SECTIONS",
+  "portals.selected": "selected",
+  "portals.settings_saved": "Settings saved",
+  "portals.show_more": "Show more",
+  "portals.shown_header_public_pages_browser": "Shown in the header of public pages and in the browser title.",
+  "portals.shown_list_search": "· shown in the list and in search",
+  "portals.soft_oceanic_look_blue_accent": "A soft oceanic look: a blue accent and generous rounding.",
+  "portals.status": "Status:",
+  "portals.support_agent_articles": "Support agent articles",
+  "portals.support_portal_not_found": "Support portal not found",
+  "portals.template_content": "The article text in Markdown.",
+  "portals.template_content_no_summary": "The article text without a summary.",
+  "portals.template_section_returns": "Returns",
+  "portals.template_title_return": "How to arrange a return",
+  "portals.template_title_warranty": "Warranty",
+  "portals.thank_feedback": "Thank you for the feedback",
+  "portals.theme_colour_scheme_public_pages": "The theme and colour scheme of the public pages. Applied before the first frame, so a visitor never sees the appearance change. The theme list comes from the installation build.",
+  "portals.theme_not_installation_build_pick": "This theme is not in the installation build. Pick another one to save the appearance.",
+  "portals.there_unsaved_edits_they_not": "There are unsaved edits — they are not on the portal yet",
+  "portals.too_many_requests_try_again": "Too many requests. Try again later",
+  "portals.top_level_object_with_articles": "A top-level object with an articles key is expected",
+  "portals.try_changing_query_or_opening": "Try changing the query or opening another section.",
+  "portals.try_reloading_page": "Try reloading the page.",
+  "portals.turn_domain_off": "Turn the domain off",
+  "portals.type": "TYPE",
+  "portals.unavailable": "unavailable",
+  "portals.unpublish": "Unpublish",
+  "portals.unpublish_2": "Unpublish it",
+  "portals.unpublish_portal": "Unpublish the portal?",
+  "portals.updated": "UPDATED",
+  "portals.updated_on": "Updated {date}",
+  "portals.use_lowercase_latin_letters_digits": "Use lowercase Latin letters, digits and hyphens.",
+  "portals.value": "VALUE",
+  "portals.version_will_become_available_portal": "This version will become available to portal visitors.",
+  "portals.versions": "VERSIONS",
+  "portals.visitor_s_view": "Visitor's view",
+  "portals.visitors_will_stop_seeing_material": "Visitors will stop seeing the material; the address stays with the portal.",
+  "portals.votes_summary": "Helpful {helpful} · did not help {unhelpful}",
+  "portals.was_article_helpful": "Was this article helpful?",
+  "portals.web_widget_updated": "Web widget updated",
+  "portals.widget_available_anonymous_portal_visitors": "The widget is available to anonymous portal visitors only.",
+  "portals.working": "working",
+  "portals.yaml_format_note": "A YAML file · format: articles: [{format}]",
+  "portals.yes_article_helped": "Yes, the article helped",
+  "profile.accent_colour": "Accent colour",
+  "profile.address_unknown": "address unknown",
+  "profile.all_conversations": "All conversations",
+  "profile.appearance": "Appearance",
+  "profile.apply": "Apply",
+  "profile.authenticator_connected": "Authenticator connected",
+  "profile.authenticator_last_used": "Authenticator connected · last code {date}",
+  "profile.back": "Back",
+  "profile.change_password": "Change password",
+  "profile.code_from_authenticator_app_required": "On. A code from your authenticator app is required at every sign-in.",
+  "profile.collapse_menu": "Collapse the menu",
+  "profile.colleagues_will_see_initials_again": "Colleagues will see your initials again instead of the photo.",
+  "profile.connect": "Connect",
+  "profile.connect_entry_point": "Connect an entry point",
+  "profile.could_not_change_totp": "Could not change TOTP",
+  "profile.could_not_end_sessions": "Could not end the sessions",
+  "profile.could_not_remove_photo": "Could not remove the photo",
+  "profile.could_not_save_profile": "Could not save the profile",
+  "profile.could_not_update_password": "Could not update the password",
+  "profile.could_not_upload_photo": "Could not upload the photo",
+  "profile.create_agent": "Create an agent",
+  "profile.current": "current",
+  "profile.current_password": "Current password",
+  "profile.custom_colour_hex_value_like": "A custom colour is a HEX value like #1677ff",
+  "profile.dark": "Dark",
+  "profile.disconnect": "Disconnect",
+  "profile.drag_resize_double_click_reset": "Drag to resize, double-click to reset",
+  "profile.email_used_sign": "Email · used to sign in",
+  "profile.end_others": "End the others",
+  "profile.ending": "Ending",
+  "profile.enter_current_password_change_password": "Enter your current password in the change-password block to turn TOTP off",
+  "profile.expand": "Expand",
+  "profile.getting_started": "Getting started",
+  "profile.getting_started_progress": "{done} of {total}",
+  "profile.go_start_page": "Go to the start page",
+  "profile.groups_list": "· groups: {groups}",
+  "profile.in_organization_since": "· in the organization since {date}",
+  "profile.interface_language": "Interface language",
+  "profile.invite": "Invite",
+  "profile.invite_operators": "Invite operators",
+  "profile.language": "Language",
+  "profile.language_as_organization": "Match the organization",
+  "profile.language_lead": "A personal setting stored in your account. The page reloads once it is saved.",
+  "profile.light": "Light",
+  "profile.link_bot": "Link a bot",
+  "profile.match_system": "Match the system",
+  "profile.menu": "Menu",
+  "profile.messenger_notifications": "Messenger notifications",
+  "profile.min_10_characters": "min. 10 characters",
+  "profile.no_notification_bots_configured_owner": "No notification bots are configured. The owner can add one under Settings → Integrations (the “Notification bot for operators” checkbox).",
+  "profile.off_strongly_recommended_owner_administrators": "Off. Strongly recommended for the owner and administrators.",
+  "profile.password_updated": "Password updated",
+  "profile.password_updated_sessions": "Password updated, {count} sessions ended",
+  "profile.personal_details": "Personal details",
+  "profile.personal_details_saved": "Personal details saved",
+  "profile.personal_setting_stored_account_applies": "This is a personal setting stored in your account: it applies on every device you use, with no reload.",
+  "profile.png_jpeg_or_webp_up": "PNG, JPEG or WebP · up to 2 MB. Visible to colleagues in chat.",
+  "profile.png_jpeg_or_webp_up_2": "PNG, JPEG or WebP · up to 2 MB. Visible to colleagues in chat, on message signatures and when picking an assignee.",
+  "profile.preparing_link": "Preparing the link…",
+  "profile.press_link_bot_then_start": "Press “Link a bot”, then “Start” in the chat that opens: the link confirms itself.",
+  "profile.remove_photo": "Remove the photo?",
+  "profile.replace": "Replace",
+  "profile.service_notification_bot": "@{username} · service notification bot",
+  "profile.sessions_ended_count": "{count} sessions ended",
+  "profile.sidebar_width": "Sidebar width",
+  "profile.specialist": "Specialist",
+  "profile.theme": "Theme",
+  "profile.there_no_other_active_sessions": "There are no other active sessions",
+  "profile.toggle_two_factor_authentication": "Toggle two-factor authentication",
+  "profile.totp_off_sessions": "TOTP turned off, {count} sessions ended",
+  "profile.totp_turned_off": "TOTP turned off",
+  "profile.two_factor_authentication": "Two-factor authentication",
+  "profile.update_password": "Update password",
+  "profile.updating": "Updating",
+  "profile.user_menu": "User menu",
+  "profile.without_second_factor_access_organization": "Without a second factor, access to the organization rests on the password alone",
+  "profile.work_events_reach_even_with": "Work events reach you even with the browser closed. One messenger at a time: linking a new one replaces the current.",
+  "sales.all_agents": "All agents",
+  "sales.all_channels": "All channels",
+  "sales.anonymous_session": "{channel} · {connection}, anonymous session",
+  "sales.anonymous_widget_session": "anonymous widget session",
+  "sales.call": "Call",
+  "sales.change_filter_conditions_or_clear": "Change the filter conditions or clear them.",
+  "sales.city_country": "{city}, {country}",
+  "sales.closed": "Closed",
+  "sales.closed_2": "closed",
+  "sales.compare_merge": "Compare and merge",
+  "sales.confirmed_by_connection": ", confirmed by the connection",
+  "sales.confirmed_by_phone": "Confirmed by phone",
+  "sales.contact_actions": "Contact actions",
+  "sales.contact_conversations": "Contact conversations",
+  "sales.contact_details_requested": "Contact details requested",
+  "sales.contact_has_no_conversations_yet": "This contact has no conversations yet",
+  "sales.contacts_appear_once_customers_write": "Contacts appear once customers write to your agent",
+  "sales.conversations": "Conversations",
+  "sales.copy_cid": "Copy the CID",
+  "sales.could_not_complete_operation": "Could not complete the operation",
+  "sales.could_not_load_contact": "Could not load the contact",
+  "sales.could_not_load_contacts": "Could not load the contacts",
+  "sales.could_not_send_request_try": "Could not send the request — try again",
+  "sales.country_russia": "Russia",
+  "sales.current_conversation": "Current conversation",
+  "sales.current_conversation_2": "for the current conversation",
+  "sales.duplicate_dialogs": "{count} conv.",
+  "sales.edit_contact": "Edit the contact",
+  "sales.everyone_who_writes_through_telegram": "Everyone who writes through Telegram, MAX, email or the widget becomes a contact with a conversation history.",
+  "sales.example_same_customer_confirmed_phone": "For example: the same customer, the confirmed phone number matched",
+  "sales.export_csv": "Export CSV",
+  "sales.first_contact": "First contact",
+  "sales.first_enquiry": "First enquiry",
+  "sales.handled_by_f": "handled by {name}",
+  "sales.handled_by_m": "handled by {name}",
+  "sales.handled_by_operator": "handled by {name}",
+  "sales.how_reach_them": "How to reach them",
+  "sales.identities": "Identities",
+  "sales.identities_and_dialogs": "{identities} identities · {dialogs} conv.",
+  "sales.identities_conversations_move_contact_stays": "Identities and conversations move to the contact that stays. The operation is written to the action log and can be undone.",
+  "sales.identities_from_different_connections_not": "Identities from different connections are not merged automatically. Only one the connection handed over with a verified phone number counts as confirmed.",
+  "sales.identity_since": "since {date}",
+  "sales.last_activity": "Last activity",
+  "sales.last_conversation": "Last conversation",
+  "sales.merge": "Merge",
+  "sales.merge_contacts": "Merge the contacts",
+  "sales.merged": "Merged in",
+  "sales.merging": "Merging",
+  "sales.name_email_phone_or_username": "Name, email, phone or username…",
+  "sales.no_connection_identities": "No connection identities",
+  "sales.no_contacts_found": "No contacts found",
+  "sales.no_description": "No description",
+  "sales.no_events": "No events",
+  "sales.no_events_yet": "No events yet",
+  "sales.no_group": "no group",
+  "sales.no_phone_number": "no phone number",
+  "sales.not_confirmed": "Not confirmed",
+  "sales.not_confirmed_by_connection": "(not confirmed by the connection)",
+  "sales.not_match": "Not a match",
+  "sales.only_owner_can_merge_contacts": "Only the owner can merge contacts.",
+  "sales.open": "Open",
+  "sales.open_2": "open",
+  "sales.open_column": "Open",
+  "sales.open_compare": "Open and compare",
+  "sales.open_conversation": "Open the conversation",
+  "sales.open_conversations": "Open conversations",
+  "sales.operator_handling": "An operator is handling it",
+  "sales.overview": "Overview",
+  "sales.person_handling": "A person is handling it",
+  "sales.phone_matches": "The phone number matches{confirmed}",
+  "sales.possible_duplicate": "Possible duplicate",
+  "sales.reason_merging": "Reason for merging",
+  "sales.request_contact_details": "Request contact details",
+  "sales.set_up_connections": "Set up connections",
+  "sales.spam": "spam",
+  "sales.stays": "Stays",
+  "sales.suggestion": "suggestion",
+  "sales.there_no_other_conversations_with": "There are no other conversations with this contact",
+  "sales.username": "Username",
+  "sales.video_call": "Video call",
+  "sales.waiting": "Waiting",
+  "sales.when": "When",
+  "sales.widget": "widget",
+  "sales.with_open_conversation": "With an open conversation",
+  "settings.access_checked_at": "Access checked {date}",
+  "settings.access_lifetime_seconds": "Access lifetime, seconds",
+  "settings.action_audit": "Action audit",
+  "settings.add_connection": "Add a connection",
+  "settings.add_provider": "Add a provider",
+  "settings.address_hint": "Until you have a domain, this holds the server address — the one you ran the first-start wizard on. Once you have a domain and put TLS in front of the installation, enter it here and switch to https. Links will look like",
+  "settings.address_placeholder": "address",
+  "settings.addressing": "Addressing",
+  "settings.ai_provider": "AI provider",
+  "settings.allowed_domains": "Allowed domains",
+  "settings.answers_from_agent_s_knowledge": "Answers from the agent's knowledge with no external requests or keys. Answer quality is limited — for real work connect OpenRouter or a compatible provider.",
+  "settings.api_key": "API key",
+  "settings.attachments_voice_messages_photos_logos": "Attachments, voice messages, photos and logos — on the installation disk or in external S3-compatible storage.",
+  "settings.audio_calls": "Audio calls",
+  "settings.back_section_list": "Back to the section list",
+  "settings.bot": "Bot",
+  "settings.bot_token": "Bot token",
+  "settings.bots_email_web_widget_entry": "Bots, email and the web widget are the entry points for conversations. Each is bound to the agent that answers first.",
+  "settings.bucket": "Bucket",
+  "settings.check": "Check",
+  "settings.check_access": "Check access",
+  "settings.checking": "Checking…",
+  "settings.checking_2": "Checking…",
+  "settings.config": "CONFIG",
+  "settings.could_not_create_group": "Could not create the group",
+  "settings.could_not_delete": "Could not delete it",
+  "settings.could_not_delete_group": "Could not delete the group",
+  "settings.could_not_load_entry_points": "Could not load the entry points",
+  "settings.could_not_load_installation_settings": "Could not load the installation settings",
+  "settings.could_not_load_integrations": "Could not load the integrations",
+  "settings.could_not_load_relay_settings": "Could not load the relay settings",
+  "settings.could_not_load_settings": "Could not load the settings",
+  "settings.could_not_load_storage_settings": "Could not load the storage settings",
+  "settings.could_not_read_demo_data": "Could not read the demo data status",
+  "settings.could_not_rename": "Could not rename it",
+  "settings.could_not_start_installation": "Could not start the installation",
+  "settings.could_not_start_removal": "Could not start the removal",
+  "settings.default_model": "Default model",
+  "settings.delete_group": "Delete the group?",
+  "settings.delete_integration": "Delete the integration?",
+  "settings.demo_contents": "Operators and groups, agents with connections, knowledge, conversations in every state, voice messages, reply templates, a support portal, calls and notifications. Removed as a whole — your own data is untouched.",
+  "settings.demo_data": "Demo data",
+  "settings.demo_data_being_installed_sections": "The demo data is being installed — the sections fill up in a few seconds.",
+  "settings.demo_data_ready": "The demo data is ready.",
+  "settings.demo_provider_no_key": "Demo provider (no key)",
+  "settings.demo_records_count": "{count} records",
+  "settings.disabled": "Disabled",
+  "settings.domain_or_ip": "Domain or IP",
+  "settings.e_g_openrouter_primary": "e.g. OpenRouter · primary",
+  "settings.e_g_support_mailbox": "e.g. Support mailbox",
+  "settings.edit_integration": "Edit the integration",
+  "settings.email_address": "Email address",
+  "settings.email_not_configured_nothing_sent": "Email is not configured: nothing is sent, and inviting an operator will not work.",
+  "settings.email_sent_to": "An email was sent to {email}. If it does not arrive, check the spam folder.",
+  "settings.embed_snippet_site": "Embed snippet for the site",
+  "settings.endpoint_non_aws_providers": "Endpoint (for non-AWS providers)",
+  "settings.entry_point": "Entry point",
+  "settings.entry_point_off": " · switched off",
+  "settings.every_record_demo_set_will": "Every record of the demo set will be deleted: operators, agents, conversations, knowledge and files. Anything you created stays.",
+  "settings.example_com_example_com_comma": "example.com, *.example.com — comma-separated",
+  "settings.external_s3": "External S3",
+  "settings.file_storage": "File storage",
+  "settings.files_live_installation_s_data": "Files live in the installation's data/media directory. Fine for a single server; for several instances or for redundancy, switch on S3.",
+  "settings.gmail_yandex_use_app_password": "For Gmail and Yandex use an app password, not the main account password",
+  "settings.green": "Green",
+  "settings.group_membership_edited_operator_card": "Group membership is edited on the operator card. Conversations without a group are visible to every operator.",
+  "settings.host": "Host",
+  "settings.http_host_port_or_socks5": "http://host:port or socks5://user:pass@host:port — empty for no proxy",
+  "settings.incoming_mail_imap": "Incoming mail · IMAP",
+  "settings.install": "Install",
+  "settings.install_again": "Install again",
+  "settings.installation_address": "Installation address",
+  "settings.installation_disk": "On the installation disk",
+  "settings.installation_failed": "Installation failed",
+  "settings.installed": "Installed",
+  "settings.installing": "Installing",
+  "settings.installing_2": "Installing…",
+  "settings.integration_actions": "Integration actions",
+  "settings.knowledge_attachments_voice_messages_photos": "Knowledge attachments, voice messages, photos and logos",
+  "settings.knowledge_attachments_voice_messages_photos_2": "Knowledge attachments, voice messages, photos and logos will be written to the bucket under per-organization prefixes. Files already uploaded stay available from disk until they are migrated.",
+  "settings.language": "Interface language",
+  "settings.language_as_installation": "Match the installation",
+  "settings.language_instance": "Installation language",
+  "settings.language_instance_hint": "The language of screens where there is no organization yet: sign-in, password reset, the first-run wizard. It is also the default for organizations that have not picked their own.",
+  "settings.language_org_hint": "The language the workspace opens in for this organization's operators. Anyone can pick their own in their profile.",
+  "settings.leave_empty_keep_unchanged": "leave empty to keep it unchanged",
+  "settings.lime": "Lime",
+  "settings.migrate_files_from_disk": "Migrate the files from disk",
+  "settings.migration_done": "Migration finished: {done} files",
+  "settings.migration_failed": "Migration stopped: {error}",
+  "settings.migration_has_started_runs_background": "The migration has started and runs in the background.",
+  "settings.migration_progress": "Migration: {done} of {total}",
+  "settings.name_logo_regional_settings_visible": "Name, logo and regional settings. Visible to operators, in the widget and in emails.",
+  "settings.new_group_name": "New group name",
+  "settings.new_integration": "New integration",
+  "settings.no_agent": "no agent",
+  "settings.no_connections_yet_add_bot": "No connections yet. Add a bot, a mailbox or the web widget.",
+  "settings.no_groups": "no groups",
+  "settings.no_providers_yet_add_openrouter": "No providers yet. Add OpenRouter or a custom endpoint.",
+  "settings.nord_atelier": "Nord Atelier",
+  "settings.not_checked_yet": "not checked yet",
+  "settings.not_installed": "Not installed",
+  "settings.not_linked": "— not linked —",
+  "settings.notification_bot_operators_service_bot": "Notification bot for operators (a service bot; it does not answer customers, and is linked in the profile)",
+  "settings.operator_invitations_password_resets": "Operator invitations and password resets",
+  "settings.organization": "Organization",
+  "settings.organization_s_keys_agent_replies": "Your organization's keys for agent replies and voice transcription. The model is chosen on the agent card.",
+  "settings.outgoing_email": "Outgoing email",
+  "settings.outgoing_mail_smtp": "Outgoing mail · SMTP",
+  "settings.path_bucket_path": "path (bucket in the path)",
+  "settings.pink": "Pink",
+  "settings.platform": "Platform",
+  "settings.port": "Port",
+  "settings.properties_installation_itself_address_opened": "Properties of the installation itself: the address it is opened at and that file links are built from, and the mail server for invitations and password resets.",
+  "settings.providers": "Providers",
+  "settings.proxy": "Proxy",
+  "settings.proxy_password_never_returned_dots": "The proxy password is never returned: dots stand in for it. Leave them as they are to keep the old password; to change it, type the new one in full",
+  "settings.purple": "Purple",
+  "settings.receiving_sending_messages_stopped": "Receiving and sending messages is stopped",
+  "settings.red": "Red",
+  "settings.region": "Region",
+  "settings.relay_when_direct_connection_does": "A relay for when a direct connection does not get through",
+  "settings.remove_demo_data": "Remove the demo data",
+  "settings.remove_demo_data_2": "Remove the demo data?",
+  "settings.removing": "Removing",
+  "settings.removing_2": "Removing…",
+  "settings.saved": "•••••••• (saved)",
+  "settings.saved_calls_will_use_these": "Saved. Calls will use these relay addresses.",
+  "settings.saved_email_will_go_through": "Saved. Email will go through this server.",
+  "settings.saved_file_links_will_use": "Saved. File links will use this address.",
+  "settings.saved_files_kept_installation_disk": "Saved. Files are kept on the installation disk.",
+  "settings.saved_new_files_go_s3": "Saved. New files go to S3, access verified.",
+  "settings.secret": "SECRET",
+  "settings.see_system_at_work_fictional": "See the system at work on a fictional organization.",
+  "settings.send_test_email": "Send a test email",
+  "settings.sender": "Sender",
+  "settings.sending": "Sending…",
+  "settings.separate_screens": "Separate screens",
+  "settings.service_notification_bot_named": "{name} · service notification bot",
+  "settings.settings_available_owner_administrators": "Settings are available to the owner and administrators",
+  "settings.sign_as_demo_operator_private": "Sign in as a demo operator in a private window to see the system through their eyes:",
+  "settings.sites_where_widget_may_open": "Sites where the widget may open: a domain, subdomains via “*.” or a full origin with a port. Everywhere else the chat answers “Chat is temporarily unavailable”",
+  "settings.smtp_server": "SMTP server",
+  "settings.storage_reachable_test_object_was": "The storage is reachable: a test object was written and deleted.",
+  "settings.switched_off": "· switched off",
+  "settings.system_opened_at_file_links": "The system is opened at it, and file links are built from it",
+  "settings.there_error": "There is an error",
+  "settings.there_no_entry_points_yet": "There are no entry points yet — connect a bot, a mailbox or the web widget under Integrations.",
+  "settings.they_split_conversations_between_operators": "They split conversations between operators: an operator sees conversations of their groups, those without a group and those they are assigned to.",
+  "settings.title": "TITLE",
+  "settings.tls_encryption_smtp_server": "TLS encryption to the SMTP server",
+  "settings.turn_addresses_one_per_line": "TURN addresses — one per line",
+  "settings.turn_calls": "TURN for calls",
+  "settings.turn_note": "Needed only when calls cross networks with strict NAT. The shared secret with the relay server {secret}",
+  "settings.turn_note_prefix": "Needed only when calls cross networks with strict NAT. The shared secret with the relay server",
+  "settings.type": "Type",
+  "settings.unavailable": "unavailable",
+  "settings.unclear_domain": "Unclear domain: {domain}",
+  "settings.user": "User",
+  "settings.video_calls": "Video calls",
+  "settings.virtual_host_bucket_domain": "virtual-host (bucket in the domain)",
+  "settings.voice_calls": "Voice and calls",
+  "settings.voice_messages": "Voice messages",
+  "settings.voice_messages_sent_by_customer": "Voice messages sent by a customer from a messenger are always accepted. Email does not support calls. Changes take effect at once.",
+  "settings.voice_transcription_model": "Voice transcription model",
+  "settings.was_already_created_by_installation": "was already created by the installation — there is nothing to enter.",
+  "settings.web_widget_embed_snippet_copied": "The web widget embed snippet is copied from its agent's card.",
+  "settings.where_customer_operator_can_record": "Where a customer and an operator can record voice messages and start audio and video calls.",
+  "settings.where_keep_files": "Where to keep files",
+  "settings.will_be_deleted_irreversible": "“{name}” will be deleted. This cannot be undone.",
+  "settings.will_created_next_time_stack": "will be created the next time the stack starts.",
+  "shared.403_access_denied": "403 · Access denied",
+  "shared.active": "Active",
+  "shared.agent_card": "Agent card",
+  "shared.ai_usage": "AI usage",
+  "shared.archived": "Archived",
+  "shared.attached": "Attached",
+  "shared.blocked": "Blocked",
+  "shared.blue": "Blue",
+  "shared.category_can_only_deleted_once": "A category can only be deleted once the categories and material inside it have been moved out.",
+  "shared.category_decides_placement_only_not": "A category decides placement only, not access",
+  "shared.category_name": "Category name",
+  "shared.characters_and_paragraphs": "{characters} characters · {paragraphs}",
+  "shared.checking": "Checking",
+  "shared.could_not_change_categories": "Could not change the categories",
+  "shared.could_not_load_list": "Could not load the list",
+  "shared.create_category": "Create a category",
+  "shared.create_subcategory_in": "Create a subcategory in {name}",
+  "shared.delete_category": "Delete the category?",
+  "shared.delete_named": "Delete {name}",
+  "shared.detached": "Detached",
+  "shared.go_back": "Go back",
+  "shared.hide_hint": "Hide the hint",
+  "shared.inactive": "Inactive",
+  "shared.indigo": "Indigo",
+  "shared.invited": "Invited",
+  "shared.knowledge_categories": "Knowledge categories",
+  "shared.knowledge_editor": "Knowledge editor",
+  "shared.knowledge_import": "Knowledge import",
+  "shared.knowledge_item": "Knowledge item",
+  "shared.line_column": "Line {line}, column {column}",
+  "shared.link_text": "link text",
+  "shared.loading_failed": "Loading failed",
+  "shared.manage_categories": "Manage categories",
+  "shared.network_error": "Network error",
+  "shared.never_checked": "Never checked",
+  "shared.new_knowledge_item": "New knowledge item",
+  "shared.next_page": "Next page",
+  "shared.orange": "Orange",
+  "shared.pick_agent": "Pick an agent",
+  "shared.portal_settings": "Portal settings",
+  "shared.previous_page": "Previous page",
+  "shared.published": "Published",
+  "shared.role_has_no_access_section": "Your role has no access to this section.",
+  "shared.running": "Running",
+  "shared.skipped_count": "Skipped: {count}.",
+  "shared.support_portal": "Support portal",
+  "shared.sys": "SYS.",
+  "shared.table_template": "\n| Column | Column |\n| ------ | ------ |\n| Value | Value |\n",
+  "shared.teal": "Teal",
+  "shared.there_no_agents_attach_material": "There are no agents to attach material to.",
+  "time.autosaved_at": "Autosaved at {time}",
+  "time.days_ago": "{count} d ago",
+  "time.days_ago_short": "{count} d ago",
+  "time.days_short": "{count} d",
+  "time.duration_is": "Duration {duration}.",
+  "time.hours_ago": "{count} h ago",
+  "time.hours_minutes": "{hours} h {minutes} min",
+  "time.hours_short": "{count} h",
+  "time.minutes_ago": "{count} min ago",
+  "time.minutes_short": "{count} min",
+  "time.resend_in": "Send again in {seconds} s",
+  "time.saved_at": "Saved {time}",
+  "time.today_at": "{time} · today",
+  "time.today_comma": "today, {time}",
+  "time.yesterday_comma": "yesterday, {time}",
+  "unit.b": "{value} B",
+  "unit.kb": "{value} KB",
+  "unit.mb": "{value} MB",
+};
diff --git a/apps/internal-ui/src/i18n/index.ts b/apps/internal-ui/src/i18n/index.ts
new file mode 100644
index 0000000..005fefe
--- /dev/null
+++ b/apps/internal-ui/src/i18n/index.ts
@@ -0,0 +1,74 @@
+// Язык рабочего места.
+//
+// Язык не хук и не контекст: он живёт в модуле, и `t` импортируется в файл так
+// же, как любая другая функция. Причина — цена альтернативы: провайдер и хук
+// в двухстах сорока файлах ради настройки, которую меняют раз в год.
+//
+// Из этого следует главное правило модуля: **язык выбирается один раз, при
+// инициализации**. В коде десятки констант уровня модуля — списки разделов,
+// подписи ролей, наборы кнопок редактора, — и они вычисляются в момент импорта
+// своего файла. Этот модуль импортируется ими же, а значит выполняется раньше
+// любого из них: к тому времени, как посчитается первая такая константа, язык
+// уже стоит правильный. Ставить его позже, из App, было бы поздно — половина
+// подписей уже застыла бы на языке по умолчанию.
+//
+// Отсюда же и перезагрузка при смене языка: пересчитать застывшие константы
+// нельзя, а переключают язык осознанно и редко — «Сохранить» в профиле и так
+// уходит на сервер, лишняя секунда на перезагрузку там незаметна.
+//
+// До входа язык брать неоткуда, кроме как из прошлого визита и настроек
+// браузера: логин и сброс пароля открываются до того, как известно, кто
+// пришёл. Запомненный язык живёт в localStorage; после входа сессия приносит
+// разрешённый сервером язык, и если он другой — страница перезагружается.
+
+import { createI18n, resolveLanguage, normalizeLanguage, type LanguageCode } from "@chatballs/shared";
+
+import { en } from "./en";
+import { ru, type MessageKey } from "./ru";
+
+const STORAGE_KEY = "chatballs.language";
+
+function remembered(): LanguageCode | "" {
+  try {
+    return normalizeLanguage(window.localStorage.getItem(STORAGE_KEY));
+  } catch {
+    // Приватное окно или заблокированные куки: язык просто не запомнится.
+    return "";
+  }
+}
+
+function remember(code: LanguageCode): void {
+  try {
+    window.localStorage.setItem(STORAGE_KEY, code);
+  } catch {
+    // Не запомнили — не беда: следующий вход возьмёт язык из сессии.
+  }
+}
+
+const initial = resolveLanguage({ user: remembered() });
+
+const i18n = createI18n<MessageKey>({ catalogs: { ru, en }, source: "ru" });
+i18n.setLanguage(initial);
+if (typeof document !== "undefined") document.documentElement.lang = initial;
+
+export type { MessageKey };
+export const t = i18n.t;
+export const tn = i18n.tn;
+export const fmt = i18n.fmt;
+export const language = i18n.language;
+
+/**
+ * Принять язык, разрешённый сервером по цепочке профиль → организация →
+ * установка. Если он отличается от текущего, страница перезагружается: часть
+ * подписей уже посчитана константами модулей, и иначе экран остался бы
+ * наполовину на старом языке.
+ *
+ * Вызывается и после загрузки сессии, и после сохранения языка в профиле —
+ * в обоих случаях источник один и тот же, ответ сервера.
+ */
+export function acceptServerLanguage(code: string | null | undefined): void {
+  const next = normalizeLanguage(code);
+  if (!next || next === i18n.language()) return;
+  remember(next);
+  window.location.reload();
+}
diff --git a/apps/internal-ui/src/i18n/ru.ts b/apps/internal-ui/src/i18n/ru.ts
new file mode 100644
index 0000000..389961e
--- /dev/null
+++ b/apps/internal-ui/src/i18n/ru.ts
@@ -0,0 +1,1413 @@
+// Словарь русского интерфейса.
+//
+// Русский — оригинал: он задаёт набор ключей, английский обязан его повторить.
+// Пропущенный перевод — ошибка компиляции, а не пустая строка у клиента.
+//
+// Ключ собран из смысла, а не из самой фразы: строку переформулируют чаще, чем
+// переименовывают, и «conversations.assign_to_me» переживает смену текста.
+
+import type { Message } from "@chatballs/shared";
+
+export const ru = {
+  "admin.30_days": "30 дней",
+  "admin.7_days": "7 дней",
+  "admin.90_days": "90 дней",
+  "admin.access": "Доступ",
+  "admin.access_block": "Блокировка доступа",
+  "admin.access_recovery": "Восстановление доступа",
+  "admin.account": "Учётная запись",
+  "admin.action_code": "Код действия",
+  "admin.action_recorded_audit_log": "Действие записано в аудит",
+  "admin.activate": "Активировать",
+  "admin.active_devices": "{count} устройств",
+  "admin.active_sessions_ended": "Активные сессии завершены",
+  "admin.add_operator": "Добавить сотрудника",
+  "admin.all_operators": "Все сотрудники",
+  "admin.all_time": "Всё время",
+  "admin.atomic_operation_organization_keeps_exactly": "Атомарная операция · в организации остаётся ровно один владелец",
+  "admin.audit_log_with_total": "Журнал действий в организации · {total}",
+  "admin.block": "Заблокировать",
+  "admin.block_operator": "Заблокировать сотрудника",
+  "admin.can_now_sign_with_new": "Теперь можно войти с новым паролем.",
+  "admin.cannot_scan_enter_key_manually": "Не получается отсканировать? Введите ключ вручную:",
+  "admin.change_address": "Изменить адрес",
+  "admin.change_temporary_password": "Смена временного пароля",
+  "admin.chat_only": "Только чат",
+  "admin.chatballs_mark_will_shown_menu": "Вместо него в меню снова будет показан знак Chatballs.",
+  "admin.check_email": "Проверьте почту",
+  "admin.checking_link": "Проверяем ссылку",
+  "admin.checking_password_reset_link": "Проверяем ссылку для сброса пароля…",
+  "admin.close_form": "Закрыть форму",
+  "admin.close_panel": "Закрыть панель",
+  "admin.code_did_not_match_try": "Код не совпал. Попробуйте ещё раз",
+  "admin.code_from_authenticator_app": "Код из приложения-аутентификатора",
+  "admin.code_refreshes": "Код обновится через",
+  "admin.confirm": "Подтвердить",
+  "admin.contact_support": "Связаться с поддержкой",
+  "admin.copied_close": "Скопировал, закрыть",
+  "admin.could_not_create_organization": "Не удалось создать организацию",
+  "admin.could_not_load_candidates": "Не удалось загрузить кандидатов",
+  "admin.could_not_load_data": "Не удалось загрузить данные",
+  "admin.could_not_load_log": "Не удалось загрузить журнал",
+  "admin.could_not_load_operator_card": "Не удалось загрузить карточку сотрудника",
+  "admin.could_not_load_operators": "Не удалось загрузить сотрудников",
+  "admin.could_not_save_changes": "Не удалось сохранить изменения",
+  "admin.could_not_save_password": "Не удалось сохранить пароль",
+  "admin.could_not_send_email": "Не удалось отправить письмо",
+  "admin.create_operator": "Создать сотрудника",
+  "admin.created": "Создан",
+  "admin.creating": "Создание",
+  "admin.creation_failed": "Ошибка создания",
+  "admin.credentials": "Учётные данные",
+  "admin.credentials_role_groups": "Учётные данные · роль · группы",
+  "admin.currency": "Валюта",
+  "admin.danger_zone": "Опасная зона",
+  "admin.e_g_operator": "напр. Оператор",
+  "admin.earlier": "Ранее",
+  "admin.elena_kuznetsova": "Елена Кузнецова",
+  "admin.email_sent": "Письмо отправлено",
+  "admin.end_all": "Завершить все",
+  "admin.end_sessions": "Завершить сессии",
+  "admin.ends_every_session_immediately_stops": "Немедленно завершит все сессии и прекратит HTTP и realtime actions. Аудит и авторство сохраняются. Требует подтверждения.",
+  "admin.enter_6_digit_code_from": "Введите 6-значный код из приложения-аутентификатора для",
+  "admin.enter_code_from_app": "Введите код из приложения",
+  "admin.enter_new_password": "Введите новый пароль",
+  "admin.enter_work_email_we_will": "Укажите рабочий email — пришлём ссылку для создания нового пароля.",
+  "admin.fair_password": "Средний пароль",
+  "admin.first_access_password": "Пароль первичного доступа",
+  "admin.first_last_name": "Имя и фамилия",
+  "admin.first_password_goes_to": "Пароль первичного доступа отправится на {email}",
+  "admin.first_run_create_organization_owner": "Первый запуск: создайте организацию и учётную запись владельца",
+  "admin.follow_link_email_set_new": "Перейдите по ссылке из письма, чтобы задать новый пароль.",
+  "admin.former_owner_s_new_role": "Новая роль прежнего владельца",
+  "admin.full_access_exactly_one_per": "Полный доступ. Ровно один в организации. Изменяется только через передачу владения.",
+  "admin.full_access_identical_owner_owner": "Полный доступ, идентичен владельцу. Единственное отличие владельца — его нельзя удалить.",
+  "admin.generate_show_me": "Сгенерировать и показать мне",
+  "admin.good_password": "Хороший пароль",
+  "admin.good_see": "Рады вас видеть!",
+  "admin.group_decides_which_conversations_visible": "Группа задаёт только видимость диалогов и не выдаёт прав.",
+  "admin.group_decides_which_conversations_visible_2": "Группа задаёт только видимость диалогов и не выдаёт прав",
+  "admin.group_will_be_deleted": "«{name}» будет удалена; её диалоги станут «Без группы».",
+  "admin.hide_password": "Скрыть пароль",
+  "admin.i_understand_consequences_confirm_transfer": "Я понимаю последствия и подтверждаю передачу владения организацией.",
+  "admin.if": "Если",
+  "admin.if_address_registered_we_will": "Если адрес зарегистрирован, отправим ссылку для сброса пароля. Ссылка действует 30 минут.",
+  "admin.install_demo_data": "Установить демо-данные",
+  "admin.last_password_change": "Последняя смена: {date} · новый можно отправить письмом или показать и скопировать",
+  "admin.last_sign": "Последний вход",
+  "admin.link_does_not_work": "Ссылка не подходит",
+  "admin.link_has_expired_or_has": "Срок действия ссылки истёк или она уже использована.",
+  "admin.link_not_valid": "Ссылка недействительна",
+  "admin.link_valid_30_minutes_one": "Ссылка действует 30 минут и только один раз. Запросите восстановление доступа ещё раз.",
+  "admin.list_holds_active_administrators_only": "В списке только активные администраторы. Чтобы передать владение сотруднику, сначала сделайте его администратором.",
+  "admin.log_actions_organization": "Журнал действий в организации",
+  "admin.logo": "Логотип",
+  "admin.logo_removed": "Логотип удалён",
+  "admin.logo_updated": "Логотип обновлён",
+  "admin.main_details": "Основные данные",
+  "admin.mark_all_as_read": "Прочитать всё",
+  "admin.member_count": "{count} сотр.",
+  "admin.name": "Ваше имя",
+  "admin.name_email_or_position": "Имя, почта или должность",
+  "admin.never_signed": "не входил",
+  "admin.new_operator": "Новый сотрудник",
+  "admin.new_owner_administrators_only": "Новый владелец · только администраторы",
+  "admin.new_owner_gains_full_access": "Новый владелец получит полный доступ. Вы потеряете права владельца, включая передачу владения и управление администраторами. Операция аудируется и необратима без повторной передачи.",
+  "admin.no_access_code": "Нет доступа к коду?",
+  "admin.no_email_after_couple_minutes": "Письмо не пришло за пару минут? Проверьте «Спам» или повторите запрос — ссылка действует 30 минут.",
+  "admin.no_events_yet": "Событий пока нет",
+  "admin.no_events_yet_2": "Событий пока нет.",
+  "admin.no_notifications": "Уведомлений нет",
+  "admin.no_operators_found": "Сотрудники не найдены",
+  "admin.nord_atelier": "Ателье Норд",
+  "admin.nothing_matched_filters": "Под фильтры ничего не подошло",
+  "admin.notifications": "Уведомления",
+  "admin.off_operator": "Отключена для этого сотрудника",
+  "admin.one_moment": "Подождите немного.",
+  "admin.open_card": "Открыть карточку",
+  "admin.operator_blocked": "Сотрудник заблокирован",
+  "admin.operator_blocked_cannot_sign_unblocking": "Сотрудник заблокирован и не может войти. Разблокировка восстановит доступ по активным назначениям.",
+  "admin.operator_created": "Сотрудник создан",
+  "admin.operator_details_changed": "Данные сотрудника изменены",
+  "admin.operator_gets_email_with_first": "Сотрудник получит письмо со ссылкой первого входа. Подходит, когда почта организации настроена и работает.",
+  "admin.operator_groups_changed": "Изменены группы сотрудника",
+  "admin.operator_password_reset": "Пароль сотрудника сброшен",
+  "admin.operator_s_active_sessions_were": "Активные сессии сотрудника завершены, при первом входе он задаст свой пароль.",
+  "admin.operator_unblocked": "Сотрудник разблокирован",
+  "admin.operators_agents_conversations_knowledge_fictional": "Сотрудники, агенты, диалоги и знания вымышленного ателье — посмотреть систему в работе. Удаляются в «Настройках» одной кнопкой.",
+  "admin.organization_details_saved": "Данные организации сохранены",
+  "admin.organization_logo_alt": "Логотип {name}",
+  "admin.organization_name": "Название организации",
+  "admin.organization_ownership_transferred": "Передано владение организацией",
+  "admin.owner": "→ Владелец",
+  "admin.owner_admin_have_identical_rights": "OWNER и ADMIN идентичны по правам; EMPLOYEE работает только в чате.",
+  "admin.owner_cannot_blocked_or_deleted": "Владельца нельзя заблокировать или удалить, поэтому других опасных действий на его карточке нет.",
+  "admin.owner_cannot_deleted_blocked_or": "Владельца нельзя удалить, заблокировать или сменить ему роль — единственный путь изменения роли владельца это передача владения.",
+  "admin.owner_s_role_changes_only": "Роль владельца меняется только через передачу владения.",
+  "admin.ownership_passes_administrator_only_they": "Владение передаётся только администратору: у него уже полный доступ, и после передачи он получит защищённые действия владельца. Операция атомарна, аудируется и требует подтверждения.",
+  "admin.ownership_transfer": "Передача владения",
+  "admin.ownership_transfer_failed": "Ошибка передачи владения",
+  "admin.password_appears_right_after_creation": "Пароль покажем сразу после создания — скопируйте его",
+  "admin.password_reset": "Пароль сброшен",
+  "admin.password_shown_once_after_creation": "Пароль покажется один раз после создания — скопируйте и передайте лично. Нужен, когда письма не доходят или ящик ещё не работает.",
+  "admin.password_shown_once_not_stored": "Пароль показывается один раз и на сервере не хранится в открытом виде. Скопируйте и передайте сотруднику лично — при первом входе он сменит его сам. Если окно закрыть, останется только сбросить пароль заново.",
+  "admin.password_was_changed_sign_chatballs": "Пароль успешно изменён. Войдите в Chatballs, используя новый пароль.",
+  "admin.password_was_generated_shown_once": "Пароль сгенерирован и показан один раз — скопируйте его сейчас.",
+  "admin.people_count": "{count} чел.",
+  "admin.period": "Период",
+  "admin.png_jpeg_or_webp_up": "PNG, JPEG или WebP · до 2 МБ. Виден в сайдбаре, виджете и письмах.",
+  "admin.position_groups": "Должность и группы",
+  "admin.qr_code_setting_up_totp": "QR-код для подключения TOTP",
+  "admin.recover_access": "Восстановить доступ",
+  "admin.registered_with_chatballs_email_with": "зарегистрирован в Chatballs, на него отправлено письмо со ссылкой для сброса пароля.",
+  "admin.rejected": "Отклонено",
+  "admin.remove_logo": "Удалить логотип?",
+  "admin.repeat_password": "Повторите пароль",
+  "admin.required_at_every_sign": "Включена · требуется при каждом входе",
+  "admin.reset_password": "Сбросить пароль",
+  "admin.result": "Результат",
+  "admin.roles_groups_showing": "Роли и группы · показано",
+  "admin.roles_groups_shown": "Роли и группы · показано {shown} из {total}",
+  "admin.russian_rouble_rub": "Российский рубль (RUB)",
+  "admin.save_sign": "Сохранить и войти",
+  "admin.scan_qr_code": "Отсканируйте QR-код",
+  "admin.scan_qr_code_authenticator_app": "Отсканируйте QR-код в приложении-аутентификаторе, затем подтвердите кодом",
+  "admin.search_by_action_object_or": "Поиск по действию, объекту или сотруднику…",
+  "admin.search_by_name_email_or": "Поиск по имени, email, должности…",
+  "admin.section": "Раздел",
+  "admin.secure_connection": "Защищённое соединение",
+  "admin.see_every_conversation_organization_operators": "Вы видите все диалоги организации. Сотрудники видят только диалоги своих групп, без группы и те, где они ответственные.",
+  "admin.send_by_email_instead": "Отправить на почту вместо этого",
+  "admin.send_email_again": "Отправить письмо ещё раз",
+  "admin.send_link": "Отправить ссылку",
+  "admin.send_work_email": "Отправить на рабочую почту",
+  "admin.set_new_password_sign_chatballs": "Задайте новый пароль для входа в Chatballs.",
+  "admin.setting_up_two_factor_authentication": "Подключение двухфакторной аутентификации",
+  "admin.show_password": "Показать пароль",
+  "admin.sign": "Войти",
+  "admin.sign_confirmation": "Подтверждение входа",
+  "admin.signed_with_temporary_password_set": "Вы вошли по временному паролю. Задайте постоянный пароль, чтобы продолжить.",
+  "admin.start": "Начать",
+  "admin.status_security": "Статус и безопасность",
+  "admin.strong_password": "Надёжный пароль",
+  "admin.succeeded": "Выполнено",
+  "admin.system_role": "Системная роль",
+  "admin.system_role_changed": "Изменена системная роль",
+  "admin.there_no_active_administrators_transfer": "Активных администраторов нет. Чтобы передать владение сотруднику, сначала сделайте его администратором.",
+  "admin.there_no_groups_yet_so": "Групп пока нет — сотрудник будет видеть все диалоги. Группы создаются в «Настройках».",
+  "admin.there_no_groups_yet_so_2": "Групп пока нет — все сотрудники видят все диалоги.",
+  "admin.time": "Время",
+  "admin.time_zone": "Часовой пояс",
+  "admin.toggle_totp": "Переключить TOTP",
+  "admin.transfer_ownership": "Передать владение",
+  "admin.transferring": "Передача…",
+  "admin.two_factor_authentication_totp": "Двухфакторная аутентификация (TOTP)",
+  "admin.unblock": "Разблокировать",
+  "admin.unblock_operator": "Разблокировать сотрудника",
+  "admin.view_only": "Только просмотр",
+  "admin.weak_password": "Слабый пароль",
+  "admin.with_no_groups_operator_sees": "Без групп сотрудник видит только диалоги без группы. Группы можно изменить позже.",
+  "admin.work_email": "рабочую почту",
+  "admin.work_email_2": "Рабочий email",
+  "admin.work_email_used_sign": "Рабочий email · используется для входа",
+  "admin.works_chat_sees_conversations_their": "Работает в чате. Видит диалоги своих групп, диалоги без группы и назначенные ему.",
+  "admin.wrong_code_attempts_left_2": "Неверный код. Осталось попыток: 2",
+  "admin.wrong_email_or_password_check": "Неверный email или пароль. Проверьте данные и попробуйте снова.",
+  "admin.yesterday": "Вчера",
+  "ai.action": "ДЕЙСТВИЕ",
+  "ai.active": "активен",
+  "ai.add_category": "Добавить категорию",
+  "ai.add_key_under_settings_ai": "Добавьте ключ в «Настройки → AI-провайдер» и выберите провайдера в блоке «Модель». До этого диалоги агента ждут человека.",
+  "ai.add_knowledge_item": "Добавить знание",
+  "ai.add_material_by_hand_or": "Добавьте материал вручную или загрузите пачкой из YAML. Пустую категорию без вложенных можно удалить в «Управлять».",
+  "ai.add_nested_one": "Добавить вложенную",
+  "ai.agent": "АГЕНТ",
+  "ai.agent_2": "Агент:",
+  "ai.agent_actions": "Действия агента",
+  "ai.agent_answers_customers_first_collects": "Агент отвечает клиентам первым и собирает диалоги в группу",
+  "ai.agent_answers_customers_first_create": "Агент отвечает клиентам первым. Создайте первого",
+  "ai.agent_answers_only_from_selected": "Агент отвечает только по выбранным материалам: знаниям библиотеки и опубликованным статьям порталов.",
+  "ai.agent_cannot_deleted_has_conversations": "Агента нельзя удалить: есть диалоги или подключения. Отвяжите подключения и закройте диалоги.",
+  "ai.agent_not_found": "Агент не найден",
+  "ai.agent_quotes_title_its_reply": "Заголовок цитируется агентом в ответе клиенту — пишите его как ответ, не как папку.",
+  "ai.agent_s_replies": "В ответах агента",
+  "ai.agent_will_be_deleted": "Агент «{name}» будет удалён безвозвратно. Диалоги и подключения не дают удалить агента.",
+  "ai.ai_cannot_reply_no_provider": "AI не может отвечать: провайдер не выбран",
+  "ai.ai_off_agent": "AI выключен у агента",
+  "ai.ai_replies_attached": "AI отвечает · {count} прикреплено",
+  "ai.all_categories_shown": "показаны все категории",
+  "ai.all_knowledge": "Все знания",
+  "ai.already_attached_agent": "уже прикреплён к этому агенту",
+  "ai.any": "Любой",
+  "ai.article_meta": "статья",
+  "ai.assignment": "Назначение",
+  "ai.attach_agent": "Прикрепить к агенту",
+  "ai.attach_detach_note": "Прикрепление и открепление — только через «Прикрепить к агенту»: операция атомарна и пишется в журнал.",
+  "ai.attachment_agent_hands_link_customer": "вложение · ссылку агент отдаёт клиенту",
+  "ai.attachments": "ВЛОЖЕНИЯ",
+  "ai.attachments_2": "Вложения",
+  "ai.available": "доступен",
+  "ai.bind": "Привязать",
+  "ai.bold": "Полужирный",
+  "ai.can_switched_off_without_deleting": "можно выключить, не удаляя",
+  "ai.cannot_delete_because": "Удалить нельзя: {reason}",
+  "ai.cannot_delete_named": "«{name}» удалить нельзя: {reason}. Сначала перенесите содержимое.",
+  "ai.categories": "КАТЕГОРИИ",
+  "ai.categories_do_not_nest_deeper": "Глубже трёх уровней категории не вкладываются",
+  "ai.category": "Категория",
+  "ai.category_cannot_moved_inside_itself": "Категорию нельзя перенести внутрь себя.",
+  "ai.category_empty_will_delete": "Категория «{name}» пуста и будет удалена.",
+  "ai.category_file_matches_current_one": "категория в файле совпадает с текущей",
+  "ai.category_has_no_items": "В категории «{name}» пока нет знаний",
+  "ai.category_named": "категория «{name}»",
+  "ai.category_not_empty": "категория не пуста",
+  "ai.changed_by_bulk_action": "меняется массовым действием",
+  "ai.characters_and_chunks": "{characters} знаков · ≈{chunks}",
+  "ai.characters_count": "{count} знаков",
+  "ai.chunks": "ФРАГМЕНТЫ",
+  "ai.chunks_and_characters": "фрагментов · {characters} знаков",
+  "ai.chunks_rebuilt_at": "{chunks} · пересобраны {date}",
+  "ai.chunks_rebuilt_save_while_rebuild": "Фрагменты пересобираются при сохранении. Пока идёт пересборка, агент отвечает по прежней версии.",
+  "ai.clear_filters_or_change_query": "Снимите фильтры или измените запрос — материалы могли остаться в других категориях.",
+  "ai.clear_selection": "Снять выделение",
+  "ai.code": "Код",
+  "ai.connection_already_bound_another_agent": "Подключение уже привязано к другому агенту",
+  "ai.copy_as_markdown": "Копировать Markdown",
+  "ai.copy_snippet": "Скопировать код",
+  "ai.could_not_bind_connection": "Не удалось привязать подключение",
+  "ai.could_not_change_agent_s": "Не удалось изменить знания агента",
+  "ai.could_not_change_ai_status": "Не удалось изменить статус AI",
+  "ai.could_not_change_participation_replies": "Не удалось изменить участие в ответах",
+  "ai.could_not_create_agent": "Не удалось создать агента",
+  "ai.could_not_delete_agent": "Не удалось удалить агента",
+  "ai.could_not_delete_attachment": "Не удалось удалить вложение",
+  "ai.could_not_delete_knowledge_item": "Не удалось удалить знание",
+  "ai.could_not_detach_connection": "Не удалось отвязать подключение",
+  "ai.could_not_import": "Не удалось импортировать",
+  "ai.could_not_load_agents": "Не удалось загрузить агентов",
+  "ai.could_not_load_categories": "Не удалось загрузить категории",
+  "ai.could_not_load_categories_knowledge": "Не удалось загрузить категории и знания",
+  "ai.could_not_load_knowledge": "Не удалось загрузить знания",
+  "ai.could_not_load_knowledge_item": "Не удалось загрузить знание",
+  "ai.could_not_load_material_list": "Не удалось загрузить список материалов",
+  "ai.could_not_move_knowledge_item": "Не удалось переместить знание",
+  "ai.could_not_move_knowledge_items": "Не удалось переместить знания",
+  "ai.could_not_read_file": "Не удалось прочитать файл",
+  "ai.could_not_reindex_knowledge_item": "Не удалось переиндексировать знание",
+  "ai.could_not_save_knowledge_item": "Не удалось сохранить знание",
+  "ai.could_not_save_selection": "Не удалось сохранить выбор",
+  "ai.could_not_upload_file": "Не удалось загрузить {name}",
+  "ai.count_create": "создать {count}",
+  "ai.count_error": "ошибка {count}",
+  "ai.count_update": "обновить {count}",
+  "ai.create": "создать",
+  "ai.create_2": "Создать",
+  "ai.created": "Создано:",
+  "ai.created_on": "создан {date}",
+  "ai.creating": "Создание…",
+  "ai.customers_reach_agent_through_these": "Через них клиенты попадают к агенту. Одно подключение — один агент.",
+  "ai.daily_limit": "Лимит в день",
+  "ai.delete_agent": "Удалить агента",
+  "ai.delete_agent_2": "Удалить агента?",
+  "ai.delete_attachment": "Удалить вложение",
+  "ai.delete_category": "Удалить категорию",
+  "ai.delete_knowledge_item": "Удалить знание",
+  "ai.delete_knowledge_item_2": "Удалить знание?",
+  "ai.delete_selected_knowledge_items": "Удалить выбранные знания?",
+  "ai.detach_from_agent": "Открепить от агента",
+  "ai.discard_edits": "Отменить правки",
+  "ai.document": "ДОКУМЕНТ",
+  "ai.document_category_path_empty_level": "Документ #{index}: в «categoryPath» есть пустой уровень",
+  "ai.document_category_path_list": "Документ #{index}: «categoryPath» должен быть непустым списком",
+  "ai.document_content_empty": "Документ #{index}: обязательное поле «content» пустое",
+  "ai.document_must_be_object": "Документ #{index}: должен быть объектом",
+  "ai.document_title_empty": "Документ #{index}: обязательное поле «title» пустое",
+  "ai.documents_must_non_empty_list": "documents должен быть непустым списком",
+  "ai.drag": "Перетащить",
+  "ai.drag_files_here": "Перетащите файлы",
+  "ai.drop_attach_item": "Отпустите, чтобы приложить к знанию",
+  "ai.editor_only": "Только редактор",
+  "ai.edits_not_saved_chunks_rebuilt": "Правки не сохранены — фрагменты пересоберутся после «Сохранить»",
+  "ai.empty": "пусто",
+  "ai.empty_item_never_reaches_replies": "Пустое знание в ответы не попадает.",
+  "ai.error": "ошибка",
+  "ai.everything_saved": "Всё сохранено",
+  "ai.example_calmly_politely_formal_address": "Например: спокойно и вежливо, на «вы»",
+  "ai.example_do_not_quote_prices": "Например: не называй цены, направляй к консультанту",
+  "ai.example_front_desk": "Например: Приёмная",
+  "ai.file_becomes_attachment_link_text": "Файл станет вложением и ссылкой в тексте — агент отдаёт её клиенту. PNG, JPG, PDF, DOCX, XLSX · до 25 МБ",
+  "ai.file_not_parsed": "{size} · файл не разобран",
+  "ai.file_parsed_before_anything_applied": "Файл разбирается до применения: видно, что создастся, что обновится и где ошибка.",
+  "ai.file_parsed_ok": "{size} · {count} · разобран без ошибок формата",
+  "ai.fragment_number": "Фрагмент {number}",
+  "ai.fragments_note": "Агент отвечает не текстом целиком, а подходящими фрагментами. Так знание разойдётся на {chunks} при сохранении.",
+  "ai.free": "Свободно",
+  "ai.free_connection": "Свободное подключение",
+  "ai.give_title_category": "Укажите заголовок и категорию",
+  "ai.group_decides_which_operators_see": "Группа определяет, кто из сотрудников видит диалоги агента; без группы — видны всем.",
+  "ai.has_nested_categories": "есть вложенные категории",
+  "ai.heading_1": "Заголовок 1",
+  "ai.heading_2": "Заголовок 2",
+  "ai.helps_search_agent": "· помогает поиску и агенту",
+  "ai.how_agent_quotes": "Как это цитирует агент",
+  "ai.how_agent_will_answer": "КАК ОТВЕТИТ АГЕНТ",
+  "ai.how_agent_will_answer_2": "Как ответит агент",
+  "ai.how_should_speak": "Как он должен говорить",
+  "ai.import_documents": "Импортировать {count}",
+  "ai.import_finished": "Импорт завершён",
+  "ai.import_never_creates_categories_implicitly": "Импорт не создаёт категории неявно: документ с несуществующим",
+  "ai.import_path_tail": "отклоняется отдельно, остальные применяются. Без указания пути документ попадает в «Без категории».",
+  "ai.index_up_date": "Индекс актуален",
+  "ai.indexing": "ИНДЕКСАЦИЯ",
+  "ai.insert_link_into_text": "Вставить ссылку в текст",
+  "ai.instructions": "инструкции",
+  "ai.instructions_2": "Инструкции",
+  "ai.internal_material": "ВНУТРЕННИЙ МАТЕРИАЛ",
+  "ai.invalid_yaml": "Невалидный YAML",
+  "ai.invalid_yaml_reason": "Невалидный YAML: {reason}",
+  "ai.italic": "Курсив",
+  "ai.item_and_files_deleted": "«{title}» и его вложения будут удалены. У агентов, которым знание прикреплено, оно исчезнет из ответов.",
+  "ai.item_attached_no_agent_so": "Знание не прикреплено ни к одному агенту — в ответах оно не используется.",
+  "ai.items_and_files_deleted": "{count} и их вложения будут удалены. У агентов, которым они прикреплены, материалы исчезнут из ответов.",
+  "ai.knowledge": "Знания",
+  "ai.knowledge_item": "ЗНАНИЕ",
+  "ai.knowledge_item_title": "Название знания",
+  "ai.knowledge_item_title_2": "Заголовок знания",
+  "ai.knowledge_item_title_without_description": "Название знания без описания",
+  "ai.library_lead": "Материалы для AI-агентов: регламенты, прайсы, скрипты. Агент отвечает только по включённым знаниям, которые к нему прикреплены. Клиент их не видит — публичное живёт в порталах.",
+  "ai.library_note": "{count} · показаны {shown} · агент отвечает только по включённым и прикреплённым",
+  "ai.link": "Ссылка",
+  "ai.link_text": "· ссылка в тексте",
+  "ai.links_go_out_agent_s": "ссылки уходят в ответ агента",
+  "ai.list": "Список",
+  "ai.manage": "Управлять",
+  "ai.material_import": "Импорт материалов",
+  "ai.missing_category_path": "категории «{name}» нет — импорт не создаёт категории. Создайте её или уберите последний уровень пути.",
+  "ai.move": "Переместить",
+  "ai.move_category": "Переместить в категорию",
+  "ai.name_group_all_takes_start": "Имя и группа — всё, что нужно для старта. Инструкции, знания и подключения настраиваются потом на карточке.",
+  "ai.name_unique_within_its_parent": "Имя уникально внутри родителя.",
+  "ai.no_agents_yet": "Пока ни одного агента.",
+  "ai.no_ai": "без AI",
+  "ai.no_ai_2": "Без AI",
+  "ai.no_ai_knowledge_not_used": "Без AI — знания не используются",
+  "ai.no_attachments": "Вложений нет.",
+  "ai.no_category_system_one_cannot": "«Без категории» системная: не переименовывается и не удаляется.",
+  "ai.no_conversations": "нет диалогов",
+  "ai.no_file_selected": "Файл не выбран",
+  "ai.no_knowledge_attached_so_agent": "Знания не прикреплены — агент отвечает только по инструкциям. Выберите статьи из библиотеки или портала поддержки.",
+  "ai.no_knowledge_item_selected": "Знание не выбрано",
+  "ai.no_knowledge_yet": "Знаний пока нет",
+  "ai.not_attached": "не прикреплено",
+  "ai.not_attached_agent": "не прикреплён к этому агенту",
+  "ai.not_checked": "Не проверено",
+  "ai.not_given": "не указана",
+  "ai.not_replies": "не в ответах",
+  "ai.not_selected": "Не выбран",
+  "ai.not_used_replies": "Не участвует в ответах",
+  "ai.note": "ЗАМЕЧАНИЕ",
+  "ai.nothing_selected": "ничего не выбрано",
+  "ai.numbered_list": "Нумерованный список",
+  "ai.off": "Выключен",
+  "ai.one_step_instructions_model_knowledge": "Один шаг. Инструкции, модель, знания и подключения — потом, на карточке агента.",
+  "ai.only_empty_category_with_nothing": "Удаление — только для пустой категории без вложенных.",
+  "ai.open": "Открытые",
+  "ai.open_knowledge_item": "Открыть знание",
+  "ai.open_settings": "Открыть настройки",
+  "ai.operation_atomic_if_any_identifier": "Операция атомарна: при недоступном идентификаторе не меняется ничего. Требуется право",
+  "ai.or": "или",
+  "ai.paste_before_lt_body_gt": "Вставьте перед &lt;/body&gt; на сайте",
+  "ai.persona": "персонализация",
+  "ai.pick_another_file": "Выбрать другой файл",
+  "ai.pick_file": "Выбрать файл",
+  "ai.pick_provider": "выберите провайдера",
+  "ai.pick_them_from_disk": "выберите на диске",
+  "ai.portal_named": "Портал · {name}",
+  "ai.preview": "Просмотр",
+  "ai.preview_of": "ПРЕДПРОСМОТР · {what}",
+  "ai.preview_only": "Только предпросмотр",
+  "ai.provider": "Провайдер",
+  "ai.provider_key_lives_under_settings": "Ключ провайдера — в «Настройки → AI-провайдер». Модель выбирается из каталога провайдера.",
+  "ai.quote": "Цитата",
+  "ai.reindex": "Переиндексировать",
+  "ai.rename": "Переименовать",
+  "ai.replies": "В ответах:",
+  "ai.replies_2": "В ОТВЕТАХ",
+  "ai.rules": "Правила",
+  "ai.save_reindex": "Сохранить и переиндексировать",
+  "ai.saving": "Сохранение…",
+  "ai.search_by_title": "Поиск по названию",
+  "ai.search_by_title_description": "Поиск по заголовку и описанию",
+  "ai.select": "Выбрать",
+  "ai.select_every_knowledge_item_page": "Выбрать все знания на странице",
+  "ai.select_item": "Выбрать «{title}»",
+  "ai.select_knowledge": "Выбрать знания",
+  "ai.selected": "выбран",
+  "ai.selected_category_note": "Выбрано {count}. Категория задаёт размещение в дереве, на ответы агента она не влияет.",
+  "ai.selected_one_agent_note": "Выбрано {count}. Один агент за операцию — так видно, что именно изменилось.",
+  "ai.short_description": "Краткое описание",
+  "ai.short_description_optional": "Короткое описание (необязательно)",
+  "ai.side_by_side": "Вместе",
+  "ai.skips_summary": "{skipped} из {total} будут пропущены:",
+  "ai.skips_tail": "Состав знаний агента по ним не изменится.",
+  "ai.start_ai": "Запустить AI",
+  "ai.stop_ai": "Остановить AI",
+  "ai.switch_off_replies": "Выключить в ответах",
+  "ai.switch_replies": "Включить в ответах",
+  "ai.switched_off_item_never_reaches": "выключенное знание не попадает в retrieval",
+  "ai.switched_off_replies": "выключен в ответах",
+  "ai.system": "системная",
+  "ai.system_category": "системная категория",
+  "ai.system_category_cannot_renamed": "Системную категорию нельзя переименовать",
+  "ai.system_prompt_assembled_from_three": "Системный промпт собирается из трёх частей в этом порядке",
+  "ai.table": "Таблица",
+  "ai.template": "Шаблон",
+  "ai.template_content": "Основной текст знания.",
+  "ai.template_description": "Короткое описание (необязательно)",
+  "ai.template_title": "Название знания",
+  "ai.template_title_no_description": "Название знания без описания",
+  "ai.text": "Текст",
+  "ai.text_preview": "Текст и предпросмотр",
+  "ai.there_no_agents_yet_create": "Агентов пока нет — создайте агента, чтобы прикреплять к нему знания.",
+  "ai.there_unsaved_changes_they_take": "Есть несохранённые изменения — применятся в runtime сразу",
+  "ai.there_unsaved_edits": "Есть несохранённые правки",
+  "ai.title_matched_text_will_replaced": "совпал заголовок — заменим текст и пересоберём фрагменты",
+  "ai.today": "сегодня",
+  "ai.tone": "тон",
+  "ai.top_level_category": "Категория верхнего уровня",
+  "ai.top_level_object_with_documents": "Ожидается объект верхнего уровня с ключом documents",
+  "ai.tree_up_three_levels_deep": "Дерево до трёх уровней. Перетащите строку, чтобы сменить родителя или порядок.",
+  "ai.turn": "Включить",
+  "ai.turn_agent": "Включить агента",
+  "ai.turn_agent_off": "Выключить агента",
+  "ai.turn_off": "Выключить",
+  "ai.unbind": "Отвязать",
+  "ai.unchanged": "· Без изменений:",
+  "ai.undo": "Отменить",
+  "ai.untitled": "Без заголовка",
+  "ai.up_25_mb": "· до 25 МБ",
+  "ai.update": "обновить",
+  "ai.updated": "· Обновлено:",
+  "ai.updated_2": "ОБНОВЛЕНО",
+  "ai.updated_by_at": "обновил {name} · {date}",
+  "ai.updated_on": "обновлено {date}",
+  "ai.used_replies": "Участвует в ответах",
+  "ai.what_will_happen": "Что произойдёт",
+  "ai.who_what_does": "Кто он и что делает",
+  "ai.widget_embed_snippet": "Код вставки виджета",
+  "ai.will_attached_after_saving": "приложится после сохранения",
+  "ai.will_land_no_category": "попадёт в «Без категории»",
+  "ai.without_group_conversations_visible_everyone": "Без группы — диалоги видны всем",
+  "ai.working_rules": "Правила работы",
+  "ai.yaml_import": "Импорт YAML",
+  "ai.yaml_shaped_as_documents_title": "YAML вида documents: [{ title, description?, content, categoryPath? }]",
+  "common.action": "Действие",
+  "common.actions": "Действия",
+  "common.actions_for": "Действия: {name}",
+  "common.active_sessions": "Активные сессии",
+  "common.administrator": "Администратор",
+  "common.agent": "Агент",
+  "common.agents": "Агенты",
+  "common.agents_2": "АГЕНТЫ",
+  "common.all": "Все",
+  "common.appearance": "Оформление",
+  "common.archive": "В архив",
+  "common.assignee": "Ответственный",
+  "common.at_least_10_characters": "Минимум 10 символов",
+  "common.at_least_10_characters_long": "Не менее 10 символов",
+  "common.attach": "Прикрепить",
+  "common.attach_file": "Прикрепить файл",
+  "common.audit": "Аудит",
+  "common.back_sign": "Вернуться ко входу",
+  "common.cancel": "Отмена",
+  "common.categories": "Категории",
+  "common.category": "КАТЕГОРИЯ",
+  "common.channels": "Каналы",
+  "common.chat": "Чат",
+  "common.city": "Город",
+  "common.close": "Закрыть",
+  "common.company": "Компания",
+  "common.connected": "Подключено",
+  "common.connections": "Подключения",
+  "common.contact": "Контакт",
+  "common.contacts": "Контакты",
+  "common.contains_digit": "Содержит цифру",
+  "common.conversations": "Диалоги",
+  "common.copied": "Скопировано",
+  "common.copy": "Копировать",
+  "common.copy_clipboard": "Скопировать",
+  "common.could_not_complete_action": "Не удалось выполнить действие",
+  "common.could_not_save": "Не удалось сохранить",
+  "common.delete": "Удалить",
+  "common.description": "Описание",
+  "common.detach": "Открепить",
+  "common.done": "Готово",
+  "common.download": "Скачать",
+  "common.draft": "Черновик",
+  "common.edit": "Изменить",
+  "common.edit_item": "Редактировать",
+  "common.emoji": "Эмодзи",
+  "common.error": "Ошибка",
+  "common.full_access": "Полный доступ",
+  "common.group": "Группа",
+  "common.groups": "Группы",
+  "common.hide": "Скрыть",
+  "common.history": "История",
+  "common.integrations": "Интеграции",
+  "common.just_now": "сейчас",
+  "common.knowledge_base": "База знаний",
+  "common.letters_special_character": "Буквы и спецсимвол",
+  "common.model": "Модель",
+  "common.more": "Ещё",
+  "common.move_archive": "Перенести в архив",
+  "common.n_of_m": "{selected} из {total}",
+  "common.name": "Имя",
+  "common.never_saved_yet": "Ещё не сохранялось",
+  "common.new_password": "Новый пароль",
+  "common.no_group": "Без группы",
+  "common.nothing_found": "Ничего не найдено",
+  "common.notifications": "Уведомления",
+  "common.object": "Объект",
+  "common.off": "Выключено",
+  "common.off_2": "Выкл",
+  "common.on": "Включено",
+  "common.on_2": "Вкл",
+  "common.operator": "Сотрудник",
+  "common.operators": "Сотрудники",
+  "common.owner": "Владелец",
+  "common.password": "Пароль",
+  "common.password_requirements": "ТРЕБОВАНИЯ К ПАРОЛЮ",
+  "common.passwords_do_not_match": "Пароли не совпадают",
+  "common.phone": "Телефон",
+  "common.photo": "Фото",
+  "common.portals": "Порталы",
+  "common.position": "Должность",
+  "common.profile": "Профиль",
+  "common.publish": "Опубликовать",
+  "common.range_of": "{from}–{to} из {total}",
+  "common.remove": "Убрать",
+  "common.remove_file": "Убрать файл",
+  "common.repeat_new_password": "Повторите новый пароль",
+  "common.reply": "Ответ",
+  "common.request_failed": "Ошибка запроса",
+  "common.reset": "Сбросить",
+  "common.role": "Роль",
+  "common.save": "Сохранить",
+  "common.saving": "Сохранение",
+  "common.selected_count": "Выбрано {count}",
+  "common.selected_of": "выбрано {selected} из {total}",
+  "common.sending": "Отправка…",
+  "common.settings": "Настройки",
+  "common.show": "Показать",
+  "common.shown_of": "Показано {shown} из {total}",
+  "common.shown_of_page": "Показано {shown} из {total} · по {size} на странице",
+  "common.sign_out": "Выйти",
+  "common.status": "Статус",
+  "common.status_2": "СТАТУС",
+  "common.title": "Название",
+  "common.today": "Сегодня",
+  "common.try_again": "Повторить",
+  "common.upload": "Загрузить",
+  "common.uploading_percent": "загружаем… {percent} %",
+  "common.web_widget": "Web-виджет",
+  "common.web_widget_2": "Веб-виджет",
+  "common.yesterday": "вчера",
+  "common.you": "· вы",
+  "common.you_suffix": " · вы",
+  "conversations.active_call": "Активный звонок",
+  "conversations.add": "Добавить",
+  "conversations.ai_handling_conversation_message_takes": "AI ведёт диалог. Ваше сообщение перехватит его — AI перестанет отвечать",
+  "conversations.ai_replying": "AI отвечает",
+  "conversations.ai_transcript": "Расшифровка AI ·",
+  "conversations.allow_device_access_browser_settings": "Разрешите доступ к устройствам в настройках браузера и повторите.",
+  "conversations.another_operator_handling": "Ведёт другой сотрудник",
+  "conversations.another_operator_handling_conversation": "Диалог ведёт другого сотрудника",
+  "conversations.audio_call": "Аудиозвонок",
+  "conversations.audio_call_2": "аудиозвонок",
+  "conversations.back_conversation_list": "К списку диалогов",
+  "conversations.by_last_message": "По последнему сообщению",
+  "conversations.by_waiting_time": "По времени ожидания",
+  "conversations.call_again": "Позвонить снова",
+  "conversations.call_back": "Перезвонить",
+  "conversations.call_cancelled": "Звонок отменён",
+  "conversations.call_declined": "Звонок отклонён",
+  "conversations.call_declined_by": "{name} отклонил(а) вызов.",
+  "conversations.call_ended": "Звонок завершён",
+  "conversations.call_unanswered_by": "{name} не ответил(а) на вызов.",
+  "conversations.camera_off": "Камера выключена",
+  "conversations.camera_unavailable": "Камера недоступна",
+  "conversations.cancel_recording": "Отменить запись",
+  "conversations.caption_file_optional": "Подпись к файлу (необязательно)…",
+  "conversations.check_again": "Повторить проверку",
+  "conversations.check_camera_microphone": "Проверьте камеру и микрофон",
+  "conversations.check_internet_connection_try_again": "Проверьте интернет-соединение и попробуйте снова.",
+  "conversations.close_conversation": "Закрыть диалог",
+  "conversations.close_esc": "Закрыть · Esc",
+  "conversations.closed_by": "Закрыт · {name}",
+  "conversations.collapse": "Свернуть",
+  "conversations.connecting": "Соединение",
+  "conversations.connecting_call": "Соединяем звонок",
+  "conversations.conversation": "Диалог",
+  "conversations.conversation_actions": "Действия диалога",
+  "conversations.conversation_closed": "Диалог закрыт",
+  "conversations.conversation_context": "Контекст диалога",
+  "conversations.conversation_has_ended": "Разговор завершён.",
+  "conversations.conversation_list_width": "Ширина списка диалогов",
+  "conversations.conversation_moves_archive_leaves_lists": "Диалог уйдёт в архив и исчезнет из списков. Архив видят только администраторы.",
+  "conversations.conversation_will_closed_replies_stay": "Диалог будет закрыт для ответов и останется в истории со статусом «Спам».",
+  "conversations.conversation_without_group_visible_every": "Диалог без группы видят все сотрудники.",
+  "conversations.conversations_appear_once_customers_write": "Диалоги появятся, когда клиенты напишут вашему агенту",
+  "conversations.could_not_add_label": "Не удалось добавить метку",
+  "conversations.could_not_cancel_call": "Не удалось отменить звонок",
+  "conversations.could_not_connect": "Не удалось соединиться",
+  "conversations.could_not_delete_conversation": "Не удалось удалить диалог",
+  "conversations.could_not_load_conversation": "Не удалось загрузить диалог",
+  "conversations.could_not_load_conversation_history": "Не удалось загрузить историю диалога",
+  "conversations.could_not_load_conversation_list": "Не удалось загрузить список диалогов",
+  "conversations.could_not_load_earlier_messages": "Не удалось загрузить предыдущие сообщения",
+  "conversations.could_not_load_more_conversations": "Не удалось загрузить следующие диалоги",
+  "conversations.could_not_play": "Не удалось воспроизвести",
+  "conversations.could_not_refresh_conversation_history": "Не удалось обновить историю диалога",
+  "conversations.could_not_refresh_conversation_list": "Не удалось обновить список диалогов",
+  "conversations.could_not_request_call": "Не удалось запросить звонок",
+  "conversations.could_not_send_message": "Не удалось отправить сообщение",
+  "conversations.could_not_send_voice_message": "Не удалось отправить голосовое",
+  "conversations.could_not_transcribe": "Не удалось расшифровать",
+  "conversations.customer": "Клиент",
+  "conversations.customer_waiting_message_assigns_conversation": "Клиент ждёт. Ваше сообщение возьмёт диалог на вас",
+  "conversations.delete_conversation": "Удалить диалог",
+  "conversations.delete_conversation_2": "Удалить диалог?",
+  "conversations.edit_note": "Редактировать заметку",
+  "conversations.email_content": "Содержимое письма",
+  "conversations.establishing_secure_connection": "Устанавливаем защищённое соединение…",
+  "conversations.file": "Файл",
+  "conversations.file_named": "Файл · {name}",
+  "conversations.file_over_20_mb": "Файл больше 20 МБ",
+  "conversations.file_unavailable": "Файл «{name}» недоступен",
+  "conversations.finish_current_call_first": "Сначала завершите текущий {kind}",
+  "conversations.g": "Г",
+  "conversations.go_ahead": "Говорите",
+  "conversations.guest": "Гость",
+  "conversations.guest_number": "Гость {id}",
+  "conversations.hand_back_ai": "Вернуть AI",
+  "conversations.handled_by": "Диалог ведёт {name}",
+  "conversations.handled_by_short": "Ведёт {name}",
+  "conversations.handling": "Ведёте вы",
+  "conversations.hide_list": "Скрыть список",
+  "conversations.high": "Высокий",
+  "conversations.history_kept_next_time_customer": "История сохранена. Новое обращение клиента создаст новый диалог.",
+  "conversations.incoming_call": "Входящий звонок",
+  "conversations.internal_note_customer_does_not": "Внутренняя заметка — клиент её не видит",
+  "conversations.invitation_was_cancelled": "Приглашение отменено.",
+  "conversations.labels": "Метки",
+  "conversations.low": "Низкий",
+  "conversations.mark_as_spam": "Пометить как спам",
+  "conversations.mark_conversation_as_spam": "Пометить диалог как спам?",
+  "conversations.medium": "Средний",
+  "conversations.message": "Сообщение…",
+  "conversations.microphone_off": "Ваш микрофон выключен",
+  "conversations.mine": "Мои",
+  "conversations.missed_call": "Пропущенный звонок",
+  "conversations.mode": "Режим",
+  "conversations.move_group": "Перенести в группу",
+  "conversations.name_cannot_empty": "Имя не может быть пустым",
+  "conversations.name_or_email": "Имя или почта",
+  "conversations.new_label": "Новая метка",
+  "conversations.no_access_camera_microphone": "Нет доступа к камере и микрофону",
+  "conversations.no_access_microphone": "Нет доступа к микрофону",
+  "conversations.no_conversations_found": "Диалоги не найдены",
+  "conversations.no_matching_templates": "Нет подходящих шаблонов",
+  "conversations.no_messages_yet": "Пока нет сообщений",
+  "conversations.no_notes": "Заметок нет",
+  "conversations.nobody_answered_time_try_calling": "Никто не ответил вовремя. Попробуйте позвонить снова.",
+  "conversations.not_set": "Не задан",
+  "conversations.note": "Заметка",
+  "conversations.only_assignee_can_reply_take": "Отвечать может ответственный. Возьмите диалог, чтобы продолжить самостоятельно.",
+  "conversations.outgoing_call": "Исходящий звонок",
+  "conversations.pause": "Пауза",
+  "conversations.pick_conversation": "Выберите диалог",
+  "conversations.play": "Воспроизвести",
+  "conversations.priority": "Приоритет",
+  "conversations.reconnecting": "Переподключение",
+  "conversations.record_voice_message": "Записать голосовое",
+  "conversations.recording_esc_cancels_enter_sends": "Идёт запись. Esc — отменить, Enter — отправить",
+  "conversations.remove_label": "Снять метку {name}",
+  "conversations.reply_templates": "Шаблоны ответов · /",
+  "conversations.return_queue": "Вернуть в очередь",
+  "conversations.search_by_contact_or_message": "Поиск по контакту, сообщению…",
+  "conversations.send": "Отправить",
+  "conversations.sending_invitation": "Отправляем приглашение",
+  "conversations.show_earlier_messages": "Показать предыдущие сообщения",
+  "conversations.show_list": "Показать список",
+  "conversations.sorting": "Сортировка",
+  "conversations.sorting_by_last_message": "Сортировка: по последнему сообщению",
+  "conversations.sorting_by_waiting_time": "Сортировка: по времени ожидания",
+  "conversations.started": "Начат",
+  "conversations.take_conversation": "Взять диалог",
+  "conversations.templates": "Шаблоны",
+  "conversations.transcribe": "Расшифровать",
+  "conversations.transcribing": "Расшифровываем…",
+  "conversations.type_message_shift_enter_line": "Введите сообщение… Shift+Enter — перенос строки, «/» — шаблон ответа",
+  "conversations.unassigned": "Не назначен",
+  "conversations.update_browser_or_open_link": "Обновите браузер или откройте ссылку в Chrome, Safari или Edge.",
+  "conversations.video_call": "видеозвонок",
+  "conversations.video_calls_not_supported": "Видеозвонки не поддерживаются",
+  "conversations.voice_message_duration": "Голосовое сообщение · {duration}",
+  "conversations.wait_timed_out": "Время ожидания истекло",
+  "conversations.waiting_answer": "Ожидание ответа",
+  "conversations.waiting_for_operator": "Ждут оператора",
+  "conversations.waiting_for_person_since": "Ждёт человека · {waited}",
+  "conversations.waiting_person": "Ждёт человека",
+  "conversations.without_video": "Без видео",
+  "plural.agents": { one: "{count} агент", few: "{count} агента", many: "{count} агентов", other: "{count} агентов" },
+  "plural.articles": { one: "{count} статья", few: "{count} статьи", many: "{count} статей", other: "{count} статей" },
+  "plural.categories": { one: "{count} категория", few: "{count} категории", many: "{count} категорий", other: "{count} категорий" },
+  "plural.chunks": { one: "{count} фрагмент", few: "{count} фрагмента", many: "{count} фрагментов", other: "{count} фрагментов" },
+  "plural.conversations": { one: "{count} диалог", few: "{count} диалога", many: "{count} диалогов", other: "{count} диалогов" },
+  "plural.devices": { one: "{count} устройство", few: "{count} устройства", many: "{count} устройств", other: "{count} устройств" },
+  "plural.documents": { one: "{count} документ", few: "{count} документа", many: "{count} документов", other: "{count} документов" },
+  "plural.events": { one: "{count} событие", few: "{count} события", many: "{count} событий", other: "{count} событий" },
+  "plural.knowledge": { one: "{count} знание", few: "{count} знания", many: "{count} знаний", other: "{count} знаний" },
+  "plural.knowledge_noun": { one: "знание", few: "знания", many: "знаний", other: "знаний" },
+  "plural.nested": { one: "{count} вложенная", few: "{count} вложенные", many: "{count} вложенных", other: "{count} вложенных" },
+  "plural.open_conversations": { one: "{count} открытый диалог", few: "{count} открытых диалога", many: "{count} открытых диалогов", other: "{count} открытых диалогов" },
+  "plural.paragraphs": { one: "{count} абзац", few: "{count} абзаца", many: "{count} абзацев", other: "{count} абзацев" },
+  "plural.portals": { one: "{count} портал", few: "{count} портала", many: "{count} порталов", other: "{count} порталов" },
+  "plural.sections": { one: "{count} раздел", few: "{count} раздела", many: "{count} разделов", other: "{count} разделов" },
+  "plural.sessions_ended": { one: "{count} сессия завершена", few: "{count} сессии завершены", many: "{count} сессий завершено", other: "{count} сессий завершено" },
+  "portals.add_section": "Добавить раздел",
+  "portals.address": "Адрес:",
+  "portals.address_domain": "Адрес и домен",
+  "portals.address_installation": "Адрес на этой установке",
+  "portals.address_installation_2": "адрес на этой установке",
+  "portals.administrator_has_not_set_installation": "IP этой установки не задан администратором",
+  "portals.all_material": "Все материалы",
+  "portals.all_sections": "Все разделы",
+  "portals.archive_note": "Архивный портал перестаёт открываться по публичному адресу, а его материалы исчезают из ответов агента. Ничего не удаляется: портал можно вернуть из архива.",
+  "portals.archived": "В архиве",
+  "portals.article": "СТАТЬЯ",
+  "portals.article_2": "В этой статье",
+  "portals.article_attachment": "· вложение статьи",
+  "portals.article_category_path_required": "Статья #{index}: обязательное поле «categoryPath» — непустой список разделов",
+  "portals.article_content_empty": "Статья #{index}: обязательное поле «content» пустое",
+  "portals.article_contents": "Содержание статьи",
+  "portals.article_files": "ФАЙЛЫ СТАТЬИ",
+  "portals.article_import": "Импорт статей",
+  "portals.article_must_be_object": "Статья #{index}: должна быть объектом",
+  "portals.article_not_found": "Статья не найдена",
+  "portals.article_section_empty": "Статья #{index}: раздел #{segment} пустой",
+  "portals.article_slug_empty": "Статья #{index}: обязательное поле «slug» пустое",
+  "portals.article_title": "Заголовок статьи",
+  "portals.article_title_empty": "Статья #{index}: обязательное поле «title» пустое",
+  "portals.article_will_disappear_from_public": "Статья исчезнет с публичного портала.",
+  "portals.articles_match_address_creates_new": "статей. Совпадение по адресу создаст новую версию.",
+  "portals.articles_must_non_empty_list": "articles должен быть непустым списком",
+  "portals.back_knowledge_base": "Вернуться в базу знаний",
+  "portals.base_domain_hint": "задан администратором при установке и одинаков для всех порталов этой инсталляции. Адрес входит в ссылки на статьи — после смены старые ссылки перестанут работать.",
+  "portals.base_help_center_look_light": "Базовое оформление Help Center: светлая подложка, чернильный акцент.",
+  "portals.basics": "Основные",
+  "portals.change": "изменить",
+  "portals.change_conflicts_with_current_data": "Изменение конфликтует с текущими данными",
+  "portals.changes_reach_public_pages_as": "Изменения применяются к публичным страницам сразу после сохранения.",
+  "portals.check_address_or_ask_organization": "Проверьте адрес или обратитесь к администратору организации.",
+  "portals.check_dns": "Проверить DNS",
+  "portals.check_portal_name_address": "Проверьте название и адрес портала.",
+  "portals.check_value": "Проверьте значение",
+  "portals.classic": "Классическая",
+  "portals.colour_scheme": "Цветовая схема",
+  "portals.copy_public_link": "Копировать публичную ссылку",
+  "portals.could_not_change_agent_s": "Не удалось изменить статьи агента",
+  "portals.could_not_change_article": "Не удалось изменить статью",
+  "portals.could_not_change_portal_status": "Не удалось изменить статус портала",
+  "portals.could_not_change_sections": "Не удалось изменить разделы",
+  "portals.could_not_check_domain": "Не удалось проверить домен",
+  "portals.could_not_create_portal_try": "Не удалось создать портал. Повторите попытку позже.",
+  "portals.could_not_delete_file": "Не удалось удалить файл",
+  "portals.could_not_import_articles": "Не удалось импортировать статьи",
+  "portals.could_not_load_article": "Не удалось загрузить статью",
+  "portals.could_not_load_articles": "Не удалось загрузить статьи",
+  "portals.could_not_load_portals": "Не удалось загрузить порталы",
+  "portals.could_not_move_portal_archive": "Не удалось перенести портал в архив",
+  "portals.could_not_publish_article": "Не удалось опубликовать статью",
+  "portals.could_not_save_appearance": "Не удалось сохранить оформление",
+  "portals.could_not_save_article": "Не удалось сохранить статью",
+  "portals.could_not_save_domain": "Не удалось сохранить домен",
+  "portals.could_not_save_settings": "Не удалось сохранить настройки",
+  "portals.could_not_save_web_widget": "Не удалось сохранить веб-виджет",
+  "portals.could_not_send_feedback_try": "Не удалось отправить отзыв. Попробуйте ещё раз.",
+  "portals.could_not_turn_domain_off": "Не удалось отключить домен",
+  "portals.could_not_upload_file": "Не удалось загрузить {name}",
+  "portals.create_article_first_files_attach": "Сначала создайте статью — файлы прикрепляются к существующей статье",
+  "portals.create_first_support_portal": "Создайте первый портал поддержки",
+  "portals.create_portal": "Создать портал",
+  "portals.create_section": "Создать раздел",
+  "portals.creating": "Создаём…",
+  "portals.current_state": "Текущее состояние",
+  "portals.custom_domain": "Свой домен",
+  "portals.custom_domain_2": "свой домен",
+  "portals.custom_domain_off": "Свой домен отключён",
+  "portals.custom_domain_state": "свой домен · {state}",
+  "portals.delete_file": "Удалить файл",
+  "portals.did_not_help": "не помогло",
+  "portals.dns_update_takes_up_24": "обновление DNS занимает до 24 часов",
+  "portals.do_not_show": "Не показывать",
+  "portals.domain": "Домен",
+  "portals.domain_has_not_been_checked": "Домен ещё не проверялся",
+  "portals.domain_no_extra_setup": "Больше ничего добавлять не нужно: домен ваш, установка ваша — проверка лишь смотрит, ведёт ли запись на этот сервер, и выписывает сертификат.",
+  "portals.domain_points_here": "Домен ведёт сюда",
+  "portals.domain_points_here_checked": "Домен ведёт сюда · проверено {date}",
+  "portals.domain_saved_add_record_check": "Домен сохранён. Добавьте A-запись и проверьте DNS.",
+  "portals.download_template": "Скачать шаблон",
+  "portals.draft": "черновик ·",
+  "portals.draft_autosaved_at": "Черновик сохранён автоматически в {time}",
+  "portals.draft_prefix": "черновик · ",
+  "portals.draft_revision": "черновая {revision}",
+  "portals.drop_add_article": "Отпустите, чтобы добавить в статью",
+  "portals.english": "английский",
+  "portals.example_help_centre": "Например, Центр помощи",
+  "portals.file": "ФАЙЛ",
+  "portals.files_article": "Файлы в статье",
+  "portals.files_article_2": "Файлы к статье",
+  "portals.help": "Помощь",
+  "portals.helpful": "полезно",
+  "portals.helps_make_knowledge_base_more": "Он поможет сделать базу знаний полезнее.",
+  "portals.how_looks_customer": "Как это выглядит у клиента",
+  "portals.image_goes_into_text_other": "Изображение встанет в текст, остальные файлы прикрепятся вложением к статье. PNG, JPG, WebP, PDF, DOCX · до 25 МБ",
+  "portals.immutable": "неизменяемые",
+  "portals.import": "К импорту:",
+  "portals.import_2": "Импорт",
+  "portals.import_articles_from_yaml": "Импорт статей из YAML",
+  "portals.importing": "Импорт…",
+  "portals.insert_image": "Вставить изображение",
+  "portals.insert_into_text": "Вставить в текст",
+  "portals.inserted_into_text": "· вставлен в текст",
+  "portals.invalid_yaml": "Невалидный YAML",
+  "portals.ip_of_installation": "{value} · IP этой установки",
+  "portals.knowledge_base_support": "База знаний и поддержка",
+  "portals.language": "Язык",
+  "portals.language_2": "Язык:",
+  "portals.language_3": "ЯЗЫК",
+  "portals.language_filled_new_articles_articles": "Язык, который подставляется новым статьям. Статьи на других языках остаются как есть.",
+  "portals.library_note": "{count} · показаны {shown} · агент отвечает только по опубликованным",
+  "portals.locale_created": "{locale} · создан {date}",
+  "portals.lowercase_latin_letters_digits_hyphens": "Строчные латинские буквы, цифры и дефис. Базовый домен",
+  "portals.manage_sections": "Управление разделами",
+  "portals.material": "Материалы",
+  "portals.material_2": "МАТЕРИАЛЫ",
+  "portals.move_article_archive": "Перенести статью в архив?",
+  "portals.move_portal_archive": "Перенести портал в архив?",
+  "portals.name": "ИМЯ",
+  "portals.navigation": "Навигация",
+  "portals.new_article": "Новая статья",
+  "portals.new_article_not_saved": "Новая статья · не сохранена",
+  "portals.new_support_portal": "Новый портал поддержки",
+  "portals.no_article_did_not_help": "Нет, статья не помогла",
+  "portals.no_reader_ratings_yet": "Читатели ещё не оценивали",
+  "portals.not_checked": "не проверен",
+  "portals.not_enough_rights_action": "Недостаточно прав для этого действия",
+  "portals.not_published": "не опубликована",
+  "portals.open": "Открыть",
+  "portals.open_as_visitor": "Открыть как посетитель",
+  "portals.open_material": "Открыть материалы",
+  "portals.open_portal": "Открыть портал",
+  "portals.open_portal_new_tab": "Открыть портал в новой вкладке",
+  "portals.portal": "ПОРТАЛ",
+  "portals.portal_address": "Адрес портала",
+  "portals.portal_its_material_become_unavailable": "Портал и его материалы станут недоступны посетителям до восстановления.",
+  "portals.portal_name": "Название портала",
+  "portals.portal_preview": "Предпросмотр портала",
+  "portals.portal_public_help_centre_with": "Портал — это публичный центр помощи с инструкциями и ответами для клиентов.",
+  "portals.portal_public_page_with_instructions": "Портал — публичная страница с инструкциями и ответами на частые вопросы. Клиент читает статью и, если не нашёл ответ, пишет в чат прямо со страницы.",
+  "portals.portal_s_name_public_address": "Название, публичный адрес и язык материалов портала.",
+  "portals.portal_will_open_at_company": "Портал будет открываться по адресу вашей компании. Адрес установки продолжит работать.",
+  "portals.portals_note": "{count} · архивные показываются последними",
+  "portals.preview_theme": "ПРЕДПРОСМОТР · ТЕМА ПОРТАЛА {theme}",
+  "portals.primary_language": "Основной язык",
+  "portals.public_address": "ПУБЛИЧНЫЙ АДРЕС",
+  "portals.public_chat_appears_every_portal": "Публичный чат отображается на всех страницах портала.",
+  "portals.public_knowledge_bases_customers": "Публичные базы знаний для клиентов.",
+  "portals.public_knowledge_bases_customers_every": "Публичные базы знаний для клиентов. Каждый портал — свой адрес, оформление и материалы.",
+  "portals.publish_portal": "Опубликовать портал",
+  "portals.publish_portal_2": "Опубликовать портал?",
+  "portals.publish_selected_version": "Опубликовать выбранную версию?",
+  "portals.published": "Опубликована",
+  "portals.published_2": "опубликована",
+  "portals.published_articles_will_become_available": "Опубликованные статьи станут доступны по публичному адресу.",
+  "portals.published_at_lower": "опубликован {date}",
+  "portals.publishing_archive": "Публикация и архив",
+  "portals.publishing_opens_material_visitors_archive": "Публикация открывает материалы посетителям, архив прячет портал целиком.",
+  "portals.publishing_picks_one_revision_visitors": "Публикация выбирает одну редакцию. Посетители видят только опубликованную.",
+  "portals.ratings": "ОЦЕНКИ",
+  "portals.reader_ratings": "ОЦЕНКИ ЧИТАТЕЛЕЙ",
+  "portals.record_at_domain_registrar": "Запись у регистратора домена",
+  "portals.record_not_found": "Запись не найдена",
+  "portals.restore_from_archive": "Вернуть из архива",
+  "portals.resulting_link": "Итоговая ссылка",
+  "portals.revision": "РЕДАКЦИЯ",
+  "portals.revision_draft": "Редакция {revision} · черновик",
+  "portals.revision_number": "Редакция {revision}",
+  "portals.revision_published": "Редакция {revision} · опубликована",
+  "portals.russian": "Русский",
+  "portals.russian_2": "русский",
+  "portals.save_appearance": "Сохранить оформление",
+  "portals.save_domain": "Сохранить домен",
+  "portals.save_draft": "Сохранить черновик",
+  "portals.save_settings": "Сохранить настройки",
+  "portals.save_widget": "Сохранить виджет",
+  "portals.saved_at_lower": "сохранено {date}",
+  "portals.search_articles": "Поиск по статьям",
+  "portals.search_articles_2": "Поиск по статьям...",
+  "portals.search_by_name_address": "Поиск по названию и адресу",
+  "portals.search_knowledge_base": "Поиск по базе знаний",
+  "portals.search_query": "Поиск: «{query}»",
+  "portals.search_results": "Результаты поиска",
+  "portals.section": "РАЗДЕЛ",
+  "portals.section_can_only_deleted_once": "Раздел можно удалить только после переноса вложенных разделов и статей.",
+  "portals.section_decides_where_articles_sit": "Раздел определяет расположение статей в публичном портале",
+  "portals.sections": "РАЗДЕЛЫ",
+  "portals.selected": "выбрана",
+  "portals.settings_saved": "Настройки сохранены",
+  "portals.show_more": "Показать ещё",
+  "portals.shown_header_public_pages_browser": "Показывается в шапке публичных страниц и в заголовке браузера.",
+  "portals.shown_list_search": "· показывается в списке и поиске",
+  "portals.soft_oceanic_look_blue_accent": "Мягкое океаническое оформление: синий акцент, крупные скругления.",
+  "portals.status": "Статус:",
+  "portals.support_agent_articles": "Статьи агента поддержки",
+  "portals.support_portal_not_found": "Портал поддержки не найден",
+  "portals.template_content": "Текст статьи в Markdown.",
+  "portals.template_content_no_summary": "Текст статьи без описания.",
+  "portals.template_section_returns": "Возврат",
+  "portals.template_title_return": "Как оформить возврат",
+  "portals.template_title_warranty": "Гарантия",
+  "portals.thank_feedback": "Спасибо за отзыв",
+  "portals.theme_colour_scheme_public_pages": "Тема публичных страниц и цветовая схема. Применяется до первого кадра — посетитель не видит смены оформления. Список тем — из сборки установки.",
+  "portals.theme_not_installation_build_pick": "Темы нет в этой сборке установки. Выберите другую, чтобы сохранить оформление.",
+  "portals.there_unsaved_edits_they_not": "Есть несохранённые правки — их ещё нет на портале",
+  "portals.too_many_requests_try_again": "Слишком много запросов. Повторите позже",
+  "portals.top_level_object_with_articles": "Ожидается объект верхнего уровня с ключом articles",
+  "portals.try_changing_query_or_opening": "Попробуйте изменить запрос или открыть другой раздел.",
+  "portals.try_reloading_page": "Попробуйте обновить страницу.",
+  "portals.turn_domain_off": "Отключить домен",
+  "portals.type": "ТИП",
+  "portals.unavailable": "недоступна",
+  "portals.unpublish": "Снять с публикации",
+  "portals.unpublish_2": "Снять",
+  "portals.unpublish_portal": "Снять портал с публикации?",
+  "portals.updated": "ОБНОВЛЁН",
+  "portals.updated_on": "Обновлено {date}",
+  "portals.use_lowercase_latin_letters_digits": "Используйте строчные латинские буквы, цифры и дефисы.",
+  "portals.value": "ЗНАЧЕНИЕ",
+  "portals.version_will_become_available_portal": "Эта версия станет доступна посетителям портала.",
+  "portals.versions": "ВЕРСИИ",
+  "portals.visitor_s_view": "Как у посетителя",
+  "portals.visitors_will_stop_seeing_material": "Посетители перестанут видеть материалы, адрес останется за порталом.",
+  "portals.votes_summary": "Полезно {helpful} · не помогло {unhelpful}",
+  "portals.was_article_helpful": "Эта статья была полезна?",
+  "portals.web_widget_updated": "Веб-виджет обновлён",
+  "portals.widget_available_anonymous_portal_visitors": "Виджет доступен только анонимным посетителям портала.",
+  "portals.working": "работает",
+  "portals.yaml_format_note": "Файл YAML · формат: articles: [{format}]",
+  "portals.yes_article_helped": "Да, статья полезна",
+  "profile.accent_colour": "Акцентный цвет",
+  "profile.address_unknown": "адрес неизвестен",
+  "profile.all_conversations": "Все диалоги",
+  "profile.appearance": "Внешний вид",
+  "profile.apply": "Применить",
+  "profile.authenticator_connected": "Аутентификатор подключён",
+  "profile.authenticator_last_used": "Аутентификатор подключён · последний код {date}",
+  "profile.back": "Назад",
+  "profile.change_password": "Смена пароля",
+  "profile.code_from_authenticator_app_required": "Включена. Код из приложения-аутентификатора запрашивается при каждом входе.",
+  "profile.collapse_menu": "Свернуть меню",
+  "profile.colleagues_will_see_initials_again": "Вместо фото коллеги снова увидят ваши инициалы.",
+  "profile.connect": "Подключить",
+  "profile.connect_entry_point": "Подключить точку входа",
+  "profile.could_not_change_totp": "Не удалось изменить TOTP",
+  "profile.could_not_end_sessions": "Не удалось завершить сессии",
+  "profile.could_not_remove_photo": "Не удалось удалить фото",
+  "profile.could_not_save_profile": "Не удалось сохранить профиль",
+  "profile.could_not_update_password": "Не удалось обновить пароль",
+  "profile.could_not_upload_photo": "Не удалось загрузить фото",
+  "profile.create_agent": "Создать агента",
+  "profile.current": "текущая",
+  "profile.current_password": "Текущий пароль",
+  "profile.custom_colour_hex_value_like": "Свой цвет — HEX вида #1677ff",
+  "profile.dark": "Тёмная",
+  "profile.disconnect": "Отключить",
+  "profile.drag_resize_double_click_reset": "Потяните, двойной клик — сбросить",
+  "profile.email_used_sign": "Email · используется для входа",
+  "profile.end_others": "Завершить другие",
+  "profile.ending": "Завершение",
+  "profile.enter_current_password_change_password": "Введите текущий пароль в блоке смены пароля, чтобы отключить TOTP",
+  "profile.expand": "Развернуть",
+  "profile.getting_started": "Запуск",
+  "profile.getting_started_progress": "{done} из {total}",
+  "profile.go_start_page": "На главную",
+  "profile.groups_list": "· группы: {groups}",
+  "profile.in_organization_since": "· в организации с {date}",
+  "profile.interface_language": "Язык интерфейса",
+  "profile.invite": "Пригласить",
+  "profile.invite_operators": "Пригласить сотрудников",
+  "profile.language": "Язык",
+  "profile.language_as_organization": "Как в организации",
+  "profile.language_lead": "Настройка личная и хранится в учётной записи. После сохранения страница перезагрузится.",
+  "profile.light": "Светлая",
+  "profile.link_bot": "Привязать бота",
+  "profile.match_system": "Как в системе",
+  "profile.menu": "Меню",
+  "profile.messenger_notifications": "Уведомления в мессенджер",
+  "profile.min_10_characters": "мин. 10 символов",
+  "profile.no_notification_bots_configured_owner": "Боты уведомлений не настроены. Владелец может добавить бота в «Настройках» → «Интеграции» (флажок «Бот уведомлений для сотрудников»).",
+  "profile.off_strongly_recommended_owner_administrators": "Отключена. Для владельца и администраторов настоятельно рекомендуется включить.",
+  "profile.password_updated": "Пароль обновлён",
+  "profile.password_updated_sessions": "Пароль обновлён, завершено сессий: {count}",
+  "profile.personal_details": "Личные данные",
+  "profile.personal_details_saved": "Личные данные сохранены",
+  "profile.personal_setting_stored_account_applies": "Настройка личная и хранится в учётной записи: применяется на всех ваших устройствах, без перезагрузки.",
+  "profile.png_jpeg_or_webp_up": "PNG, JPEG или WebP · до 2 МБ. Видно коллегам в чате.",
+  "profile.png_jpeg_or_webp_up_2": "PNG, JPEG или WebP · до 2 МБ. Видно коллегам в чате, подписях сообщений и выборе ответственного.",
+  "profile.preparing_link": "Готовим ссылку…",
+  "profile.press_link_bot_then_start": "Нажмите «Привязать бота» и в открывшемся чате — «Начать»: привязка подтвердится сама.",
+  "profile.remove_photo": "Удалить фото?",
+  "profile.replace": "Заменить",
+  "profile.service_notification_bot": "@{username} · сервисный бот уведомлений",
+  "profile.sessions_ended_count": "Завершено сессий: {count}",
+  "profile.sidebar_width": "Ширина сайдбара",
+  "profile.specialist": "Специалист",
+  "profile.theme": "Тема",
+  "profile.there_no_other_active_sessions": "Других активных сессий нет",
+  "profile.toggle_two_factor_authentication": "Переключить двухфакторную аутентификацию",
+  "profile.totp_off_sessions": "TOTP отключена, завершено сессий: {count}",
+  "profile.totp_turned_off": "TOTP отключена",
+  "profile.two_factor_authentication": "Двухфакторная аутентификация",
+  "profile.update_password": "Обновить пароль",
+  "profile.updating": "Обновление",
+  "profile.user_menu": "Меню пользователя",
+  "profile.without_second_factor_access_organization": "Без второго фактора доступ к организации защищён только паролем",
+  "profile.work_events_reach_even_with": "Рабочие события приходят и при закрытом браузере. Один мессенджер: привязка нового заменяет текущий.",
+  "sales.all_agents": "Все агенты",
+  "sales.all_channels": "Все каналы",
+  "sales.anonymous_session": "{channel} · {connection}, анонимная сессия",
+  "sales.anonymous_widget_session": "анонимная сессия виджета",
+  "sales.call": "Позвонить",
+  "sales.change_filter_conditions_or_clear": "Измените условия фильтра или сбросьте их.",
+  "sales.city_country": "{city}, {country}",
+  "sales.closed": "Закрыт",
+  "sales.closed_2": "закрыт",
+  "sales.compare_merge": "Сравнить и объединить",
+  "sales.confirmed_by_connection": ", подтверждённый подключением",
+  "sales.confirmed_by_phone": "Подтверждён телефоном",
+  "sales.contact_actions": "Действия контакта",
+  "sales.contact_conversations": "Диалоги контакта",
+  "sales.contact_details_requested": "Контакт запрошен",
+  "sales.contact_has_no_conversations_yet": "У контакта ещё нет диалогов",
+  "sales.contacts_appear_once_customers_write": "Контакты появятся, когда клиенты напишут вашему агенту",
+  "sales.conversations": "Диалогов",
+  "sales.copy_cid": "Скопировать CID",
+  "sales.could_not_complete_operation": "Не удалось выполнить операцию",
+  "sales.could_not_load_contact": "Не удалось загрузить контакт",
+  "sales.could_not_load_contacts": "Не удалось загрузить контакты",
+  "sales.could_not_send_request_try": "Не удалось отправить запрос — попробуйте ещё раз",
+  "sales.country_russia": "Россия",
+  "sales.current_conversation": "Текущий диалог",
+  "sales.current_conversation_2": "по текущему диалогу",
+  "sales.duplicate_dialogs": "{count} диал.",
+  "sales.edit_contact": "Редактировать контакт",
+  "sales.everyone_who_writes_through_telegram": "Каждый, кто написал через Telegram, MAX, почту или виджет, становится контактом с историей диалогов.",
+  "sales.example_same_customer_confirmed_phone": "Например: один и тот же клиент, совпал подтверждённый телефон",
+  "sales.export_csv": "Экспорт CSV",
+  "sales.first_contact": "Первый контакт",
+  "sales.first_enquiry": "Первое обращение",
+  "sales.handled_by_f": "вела {name}",
+  "sales.handled_by_m": "вёл {name}",
+  "sales.handled_by_operator": "вёл {name}",
+  "sales.how_reach_them": "Как связаться",
+  "sales.identities": "Идентификаторы",
+  "sales.identities_and_dialogs": "{identities} идентичн. · {dialogs} диал.",
+  "sales.identities_conversations_move_contact_stays": "Идентичности и диалоги перейдут к контакту, который останется. Операция записывается в журнал действий и может быть разъединена обратно.",
+  "sales.identities_from_different_connections_not": "Идентичности разных подключений не объединяются автоматически. Подтверждённой считается только та, что подключение отдало с проверенным телефоном.",
+  "sales.identity_since": "с {date}",
+  "sales.last_activity": "Последняя активность",
+  "sales.last_conversation": "Последний диалог",
+  "sales.merge": "Объединить",
+  "sales.merge_contacts": "Объединить контакты",
+  "sales.merged": "Присоединяется",
+  "sales.merging": "Объединение",
+  "sales.name_email_phone_or_username": "Имя, email, телефон или логин…",
+  "sales.no_connection_identities": "Нет идентификаторов подключений",
+  "sales.no_contacts_found": "Контакты не найдены",
+  "sales.no_description": "Описания нет",
+  "sales.no_events": "Нет событий",
+  "sales.no_events_yet": "Пока нет событий",
+  "sales.no_group": "без группы",
+  "sales.no_phone_number": "телефон не указан",
+  "sales.not_confirmed": "Не подтверждён",
+  "sales.not_confirmed_by_connection": "(не подтверждён подключением)",
+  "sales.not_match": "Не то",
+  "sales.only_owner_can_merge_contacts": "Объединять контакты может только владелец.",
+  "sales.open": "Открытых",
+  "sales.open_2": "открыт",
+  "sales.open_column": "Открытые",
+  "sales.open_compare": "Открыть и сравнить",
+  "sales.open_conversation": "Открыть диалог",
+  "sales.open_conversations": "Открытые диалоги",
+  "sales.operator_handling": "Ведёт сотрудник",
+  "sales.overview": "Обзор",
+  "sales.person_handling": "Ведёт человек",
+  "sales.phone_matches": "Совпадает телефон{confirmed}",
+  "sales.possible_duplicate": "Возможный дубликат",
+  "sales.reason_merging": "Причина объединения",
+  "sales.request_contact_details": "Запросить контакт",
+  "sales.set_up_connections": "Настроить подключения",
+  "sales.spam": "спам",
+  "sales.stays": "Останется",
+  "sales.suggestion": "предложение",
+  "sales.there_no_other_conversations_with": "Других диалогов с этим контактом нет",
+  "sales.username": "Логин",
+  "sales.video_call": "Видеозвонок",
+  "sales.waiting": "Ждёт",
+  "sales.when": "Когда",
+  "sales.widget": "виджет",
+  "sales.with_open_conversation": "С открытым диалогом",
+  "settings.access_checked_at": "Доступ проверен {date}",
+  "settings.access_lifetime_seconds": "Время жизни доступа, секунд",
+  "settings.action_audit": "Аудит действий",
+  "settings.add_connection": "Добавить подключение",
+  "settings.add_provider": "Добавить провайдера",
+  "settings.address_hint": "Пока домена нет, здесь стоит адрес сервера — тот, на котором вы прошли первый запуск. Заведёте домен и поставите перед установкой TLS — впишите его и переключите на https. Ссылки будут вида",
+  "settings.address_placeholder": "адрес",
+  "settings.addressing": "Адресация",
+  "settings.ai_provider": "AI-провайдер",
+  "settings.allowed_domains": "Разрешённые домены",
+  "settings.answers_from_agent_s_knowledge": "Отвечает по знаниям агента без внешних запросов и ключей. Качество ответов ограничено — для реальной работы подключите OpenRouter или совместимый провайдер.",
+  "settings.api_key": "API-ключ",
+  "settings.attachments_voice_messages_photos_logos": "Вложения, голосовые, фото и логотипы — на диске установки или во внешнем S3-совместимом хранилище.",
+  "settings.audio_calls": "Аудиозвонки",
+  "settings.back_section_list": "К списку разделов",
+  "settings.bot": "Бот",
+  "settings.bot_token": "Токен бота",
+  "settings.bots_email_web_widget_entry": "Боты, почта и Web-виджет — точки входа диалогов. Каждая привязана к агенту, который отвечает первым.",
+  "settings.bucket": "Бакет",
+  "settings.check": "Проверить",
+  "settings.check_access": "Проверить доступ",
+  "settings.checking": "Проверяем…",
+  "settings.checking_2": "Проверка…",
+  "settings.config": "КОНФИГ",
+  "settings.could_not_create_group": "Не удалось создать группу",
+  "settings.could_not_delete": "Не удалось удалить",
+  "settings.could_not_delete_group": "Не удалось удалить группу",
+  "settings.could_not_load_entry_points": "Не удалось загрузить точки входа",
+  "settings.could_not_load_installation_settings": "Не удалось загрузить настройки установки",
+  "settings.could_not_load_integrations": "Не удалось загрузить интеграции",
+  "settings.could_not_load_relay_settings": "Не удалось загрузить настройки relay",
+  "settings.could_not_load_settings": "Не удалось загрузить настройки",
+  "settings.could_not_load_storage_settings": "Не удалось загрузить настройки хранилища",
+  "settings.could_not_read_demo_data": "Не удалось получить статус демо-данных",
+  "settings.could_not_rename": "Не удалось переименовать",
+  "settings.could_not_start_installation": "Не удалось запустить установку",
+  "settings.could_not_start_removal": "Не удалось запустить удаление",
+  "settings.default_model": "Модель по умолчанию",
+  "settings.delete_group": "Удалить группу?",
+  "settings.delete_integration": "Удалить интеграцию?",
+  "settings.demo_contents": "Сотрудники и группы, агенты с подключениями, знания, диалоги во всех состояниях, голосовые, шаблоны ответов, портал поддержки, звонки и уведомления. Удаляются целиком — ваши данные не затрагиваются.",
+  "settings.demo_data": "Демо-данные",
+  "settings.demo_data_being_installed_sections": "Демо-данные устанавливаются — разделы наполнятся через несколько секунд.",
+  "settings.demo_data_ready": "Демо-данные готовы.",
+  "settings.demo_provider_no_key": "Демо-провайдер (без ключа)",
+  "settings.demo_records_count": "{count} записей",
+  "settings.disabled": "Отключено",
+  "settings.domain_or_ip": "Домен или IP",
+  "settings.e_g_openrouter_primary": "например, OpenRouter · основной",
+  "settings.e_g_support_mailbox": "например, Почта поддержки",
+  "settings.edit_integration": "Изменить интеграцию",
+  "settings.email_address": "Email-адрес",
+  "settings.email_not_configured_nothing_sent": "Почта не настроена: письма никуда не уходят, пригласить сотрудника не получится.",
+  "settings.email_sent_to": "Письмо отправлено на {email}. Не пришло — проверьте папку «Спам».",
+  "settings.embed_snippet_site": "Код вставки на сайт",
+  "settings.endpoint_non_aws_providers": "Endpoint (для не-AWS провайдеров)",
+  "settings.entry_point": "Точка входа",
+  "settings.entry_point_off": " · выключена",
+  "settings.every_record_demo_set_will": "Будут удалены все записи демо-набора: сотрудники, агенты, диалоги, знания и файлы. Данные, созданные вами, останутся.",
+  "settings.example_com_example_com_comma": "example.com, *.example.com — через запятую",
+  "settings.external_s3": "Внешнее S3",
+  "settings.file_storage": "Хранилище файлов",
+  "settings.files_live_installation_s_data": "Файлы лежат в каталоге data/media установки. Подходит для одного сервера; для нескольких экземпляров или резервирования включите S3.",
+  "settings.gmail_yandex_use_app_password": "Для Gmail и Яндекс используйте пароль приложения, не основной пароль аккаунта",
+  "settings.green": "Зелёный",
+  "settings.group_membership_edited_operator_card": "Состав группы редактируется на карточке сотрудника. Диалоги без группы видят все сотрудники.",
+  "settings.host": "Хост",
+  "settings.http_host_port_or_socks5": "http://host:port или socks5://user:pass@host:port — пусто, если без прокси",
+  "settings.incoming_mail_imap": "Входящая почта · IMAP",
+  "settings.install": "Установить",
+  "settings.install_again": "Повторить установку",
+  "settings.installation_address": "Адрес установки",
+  "settings.installation_disk": "На диске установки",
+  "settings.installation_failed": "Ошибка установки",
+  "settings.installed": "Установлены",
+  "settings.installing": "Устанавливаются",
+  "settings.installing_2": "Устанавливаются…",
+  "settings.integration_actions": "Действия интеграции",
+  "settings.knowledge_attachments_voice_messages_photos": "Вложения знаний, голосовые, фото и логотипы",
+  "settings.knowledge_attachments_voice_messages_photos_2": "Вложения знаний, голосовые, фото и логотипы будут записываться в бакет под префиксами организаций. Уже загруженные файлы остаются доступны с диска, пока не перенесены.",
+  "settings.language": "Язык интерфейса",
+  "settings.language_as_installation": "Как в установке",
+  "settings.language_instance": "Язык установки",
+  "settings.language_instance_hint": "Язык экранов, где организации ещё нет: вход, сброс пароля, мастер первого запуска. Он же — умолчание для организаций, которые своего языка не выбрали.",
+  "settings.language_org_hint": "Язык, на котором рабочее место открывается сотрудникам организации. Каждый может выбрать свой в профиле.",
+  "settings.leave_empty_keep_unchanged": "оставьте пустым, чтобы не менять",
+  "settings.lime": "Салатовый",
+  "settings.migrate_files_from_disk": "Перенести файлы с диска",
+  "settings.migration_done": "Перенос завершён: {done} файлов",
+  "settings.migration_failed": "Перенос прерван: {error}",
+  "settings.migration_has_started_runs_background": "Перенос запущен — идёт в фоне.",
+  "settings.migration_progress": "Перенос: {done} из {total}",
+  "settings.name_logo_regional_settings_visible": "Название, логотип и региональные параметры. Видны сотрудникам, в виджете и письмах.",
+  "settings.new_group_name": "Название новой группы",
+  "settings.new_integration": "Новая интеграция",
+  "settings.no_agent": "без агента",
+  "settings.no_connections_yet_add_bot": "Подключений пока нет. Добавьте бота, почту или Web-виджет.",
+  "settings.no_groups": "без групп",
+  "settings.no_providers_yet_add_openrouter": "Провайдеров пока нет. Добавьте OpenRouter или Custom endpoint.",
+  "settings.nord_atelier": "Ателье «Норд»",
+  "settings.not_checked_yet": "ещё не проверялось",
+  "settings.not_installed": "Не установлены",
+  "settings.not_linked": "— не привязан —",
+  "settings.notification_bot_operators_service_bot": "Бот уведомлений для сотрудников (сервисный, клиентам не отвечает; привязка в профиле)",
+  "settings.operator_invitations_password_resets": "Приглашения сотрудникам и сброс пароля",
+  "settings.organization": "Организация",
+  "settings.organization_s_keys_agent_replies": "Ключи вашей организации для ответов агентов и расшифровки голосовых. Модель выбирается на карточке агента.",
+  "settings.outgoing_email": "Исходящая почта",
+  "settings.outgoing_mail_smtp": "Исходящая почта · SMTP",
+  "settings.path_bucket_path": "path (bucket в пути)",
+  "settings.pink": "Розовый",
+  "settings.platform": "Платформа",
+  "settings.port": "Порт",
+  "settings.properties_installation_itself_address_opened": "Свойства самой установки: адрес, по которому её открывают и по которому строятся ссылки на файлы, и почтовый сервер для приглашений и сброса пароля.",
+  "settings.providers": "Провайдеры",
+  "settings.proxy": "Прокси",
+  "settings.proxy_password_never_returned_dots": "Пароль прокси наружу не отдаётся: вместо него точки. Оставьте их как есть — прежний пароль сохранится; чтобы сменить, впишите новый целиком",
+  "settings.purple": "Фиолетовый",
+  "settings.receiving_sending_messages_stopped": "Приём и отправка сообщений остановлены",
+  "settings.red": "Красный",
+  "settings.region": "Регион",
+  "settings.relay_when_direct_connection_does": "Relay на случай, когда прямое соединение не проходит",
+  "settings.remove_demo_data": "Удалить демо-данные",
+  "settings.remove_demo_data_2": "Удалить демо-данные?",
+  "settings.removing": "Удаляются",
+  "settings.removing_2": "Удаляются…",
+  "settings.saved": "•••••••• (сохранён)",
+  "settings.saved_calls_will_use_these": "Сохранено. Звонки будут использовать эти адреса relay.",
+  "settings.saved_email_will_go_through": "Сохранено. Письма пойдут через этот сервер.",
+  "settings.saved_file_links_will_use": "Сохранено. Ссылки на файлы пойдут по этому адресу.",
+  "settings.saved_files_kept_installation_disk": "Сохранено. Файлы хранятся на диске установки.",
+  "settings.saved_new_files_go_s3": "Сохранено. Новые файлы пишутся в S3, доступ проверен.",
+  "settings.secret": "СЕКРЕТ",
+  "settings.see_system_at_work_fictional": "Посмотреть систему в работе на вымышленной организации.",
+  "settings.send_test_email": "Отправить тестовое письмо",
+  "settings.sender": "Отправитель",
+  "settings.sending": "Отправляем…",
+  "settings.separate_screens": "Отдельные экраны",
+  "settings.service_notification_bot_named": "{name} · сервисный бот уведомлений",
+  "settings.settings_available_owner_administrators": "Настройки доступны владельцу и администратору",
+  "settings.sign_as_demo_operator_private": "Войдите под демо-сотрудником в приватном окне, чтобы увидеть систему его глазами:",
+  "settings.sites_where_widget_may_open": "Сайты, на которых виджету разрешено открываться: домен, поддомены через «*.» или полный origin с портом. На остальных чат ответит «Чат временно недоступен»",
+  "settings.smtp_server": "SMTP-сервер",
+  "settings.storage_reachable_test_object_was": "Хранилище доступно: пробный объект записан и удалён.",
+  "settings.switched_off": "· выключена",
+  "settings.system_opened_at_file_links": "По нему открывают систему и по нему строятся ссылки на файлы",
+  "settings.there_error": "Есть ошибка",
+  "settings.there_no_entry_points_yet": "Точек входа пока нет — подключите бота, почту или Web-виджет в «Интеграциях».",
+  "settings.they_split_conversations_between_operators": "Делят диалоги между сотрудниками: сотрудник видит диалоги своих групп, без группы и те, где он ответственный.",
+  "settings.title": "НАЗВАНИЕ",
+  "settings.tls_encryption_smtp_server": "Шифрование TLS до SMTP-сервера",
+  "settings.turn_addresses_one_per_line": "Адреса TURN — по одному в строке",
+  "settings.turn_calls": "TURN для звонков",
+  "settings.turn_note": "Нужен, только если звонки идут через сети со строгим NAT. Общий секрет с сервером relay {secret}",
+  "settings.turn_note_prefix": "Нужен, только если звонки идут через сети со строгим NAT. Общий секрет с сервером relay",
+  "settings.type": "Тип",
+  "settings.unavailable": "недоступно",
+  "settings.unclear_domain": "Непонятный домен: {domain}",
+  "settings.user": "Пользователь",
+  "settings.video_calls": "Видеозвонки",
+  "settings.virtual_host_bucket_domain": "virtual-host (bucket в домене)",
+  "settings.voice_calls": "Голосовые и звонки",
+  "settings.voice_messages": "Голосовые",
+  "settings.voice_messages_sent_by_customer": "Голосовые, присланные клиентом из мессенджера, принимаются всегда. Почта звонки не поддерживает. Изменения применяются сразу.",
+  "settings.voice_transcription_model": "Модель расшифровки голосовых",
+  "settings.was_already_created_by_installation": "уже создан установкой — вводить его не нужно.",
+  "settings.web_widget_embed_snippet_copied": "Код вставки Web-виджета копируется на карточке его агента.",
+  "settings.where_customer_operator_can_record": "Где клиент и сотрудник могут записывать голосовые и начинать аудио- и видеозвонки.",
+  "settings.where_keep_files": "Где хранить файлы",
+  "settings.will_be_deleted_irreversible": "«{name}» будет удалена. Действие необратимо.",
+  "settings.will_created_next_time_stack": "будет создан при следующем запуске стека.",
+  "shared.403_access_denied": "403 · Доступ запрещён",
+  "shared.active": "Активен",
+  "shared.agent_card": "Карточка агента",
+  "shared.ai_usage": "Использование AI",
+  "shared.archived": "Архивный",
+  "shared.attached": "Прикреплено",
+  "shared.blocked": "Заблокирован",
+  "shared.blue": "Синий",
+  "shared.category_can_only_deleted_once": "Категорию можно удалить только после переноса вложенных категорий и материалов.",
+  "shared.category_decides_placement_only_not": "Категория определяет только размещение, не доступ",
+  "shared.category_name": "Название категории",
+  "shared.characters_and_paragraphs": "{characters} знаков · {paragraphs}",
+  "shared.checking": "Проверяется",
+  "shared.could_not_change_categories": "Не удалось изменить категории",
+  "shared.could_not_load_list": "Не удалось загрузить список",
+  "shared.create_category": "Создать категорию",
+  "shared.create_subcategory_in": "Создать подкатегорию в {name}",
+  "shared.delete_category": "Удалить категорию?",
+  "shared.delete_named": "Удалить {name}",
+  "shared.detached": "Откреплено",
+  "shared.go_back": "Вернуться",
+  "shared.hide_hint": "Скрыть подсказку",
+  "shared.inactive": "Неактивен",
+  "shared.indigo": "Индиго",
+  "shared.invited": "Приглашён",
+  "shared.knowledge_categories": "Категории знаний",
+  "shared.knowledge_editor": "Редактор знания",
+  "shared.knowledge_import": "Импорт знаний",
+  "shared.knowledge_item": "Знание",
+  "shared.line_column": "Строка {line}, столбец {column}",
+  "shared.link_text": "текст ссылки",
+  "shared.loading_failed": "Ошибка загрузки",
+  "shared.manage_categories": "Управление категориями",
+  "shared.network_error": "Ошибка сети",
+  "shared.never_checked": "Не проверялось",
+  "shared.new_knowledge_item": "Новое знание",
+  "shared.next_page": "Следующая страница",
+  "shared.orange": "Оранжевый",
+  "shared.pick_agent": "Выберите агента",
+  "shared.portal_settings": "Настройки портала",
+  "shared.previous_page": "Предыдущая страница",
+  "shared.published": "Опубликован",
+  "shared.role_has_no_access_section": "У вашей роли нет доступа к этому разделу.",
+  "shared.running": "Работает",
+  "shared.skipped_count": "Пропущено: {count}.",
+  "shared.support_portal": "Портал поддержки",
+  "shared.sys": "СИСТ.",
+  "shared.table_template": "\n| Колонка | Колонка |\n| ------- | ------- |\n| Значение | Значение |\n",
+  "shared.teal": "Бирюзовый",
+  "shared.there_no_agents_attach_material": "Нет агентов, которым можно прикрепить материалы.",
+  "time.autosaved_at": "Сохранено автоматически в {time}",
+  "time.days_ago": "{count} дн. назад",
+  "time.days_ago_short": "{count} д назад",
+  "time.days_short": "{count} д",
+  "time.duration_is": "Длительность {duration}.",
+  "time.hours_ago": "{count} ч назад",
+  "time.hours_minutes": "{hours} ч {minutes} мин",
+  "time.hours_short": "{count} ч",
+  "time.minutes_ago": "{count} мин назад",
+  "time.minutes_short": "{count} мин",
+  "time.resend_in": "Отправить повторно через {seconds} с",
+  "time.saved_at": "Сохранено {time}",
+  "time.today_at": "{time} · сегодня",
+  "time.today_comma": "сегодня, {time}",
+  "time.yesterday_comma": "вчера, {time}",
+  "unit.b": "{value} Б",
+  "unit.kb": "{value} КБ",
+  "unit.mb": "{value} МБ",
+} satisfies Record<string, Message>;
+
+export type MessageKey = keyof typeof ru;
diff --git a/apps/internal-ui/src/layout/ChatMobileHeader.tsx b/apps/internal-ui/src/layout/ChatMobileHeader.tsx
index f241d4a..a7387fa 100644
--- a/apps/internal-ui/src/layout/ChatMobileHeader.tsx
+++ b/apps/internal-ui/src/layout/ChatMobileHeader.tsx
@@ -5,36 +5,29 @@ import type { RouteKey, SessionUser } from "../types";
 import { Icon } from "../shared/icons";
 import { Avatar } from "../shared/ui";
 import { scopeLabel, type DialogScope } from "../features/conversations/ConversationWorkspace";
+import { t, tn } from "../i18n";
 
 // Мобильная шапка экрана списка (дизайн-базлайн v2, кадр M1): ☰ и заголовок
 // охвата открывают дерево «Диалоги» выезжающим меню; справа — аватар с меню
 // профиля. Видна только на ≤768px.
 
-function pluralDialogs(count: number): string {
-  const mod10 = count % 10;
-  const mod100 = count % 100;
-  if (mod10 === 1 && mod100 !== 11) return `${count} диалог`;
-  if (mod10 >= 2 && mod10 <= 4 && (mod100 < 10 || mod100 >= 20)) return `${count} диалога`;
-  return `${count} диалогов`;
-}
-
 export function ChatMobileHeader({ user, scope, total, setRoute, onLogout, onOpenMenu }: { user: SessionUser; scope: DialogScope; total: number; setRoute: (route: RouteKey) => void; onLogout: () => void; onOpenMenu: () => void }) {
   const [open, setOpen] = useState(false);
   const menuItems = [
-    { key: "profile", label: <button type="button" onClick={() => setRoute("profile")}><Icon name="user" size={15} />Профиль</button> },
+    { key: "profile", label: <button type="button" onClick={() => setRoute("profile")}><Icon name="user" size={15} />{t("common.profile")}</button> },
     { type: "divider" as const },
-    { key: "logout", label: <button type="button" className="danger" onClick={onLogout}><Icon name="logout" size={15} />Выйти</button> },
+    { key: "logout", label: <button type="button" className="danger" onClick={onLogout}><Icon name="logout" size={15} />{t("common.sign_out")}</button> },
   ];
-  const title = scope.kind === "all" ? "Все диалоги" : scopeLabel(scope);
+  const title = scope.kind === "all" ? t("profile.all_conversations") : scopeLabel(scope);
   return (
     <div className="chat-mobile-header">
-      <button className="chat-mobile-menu" type="button" aria-label="Меню" onClick={onOpenMenu}><Icon name="list" size={20} /></button>
+      <button className="chat-mobile-menu" type="button" aria-label={t("profile.menu")} onClick={onOpenMenu}><Icon name="list" size={20} /></button>
       <button className="chat-mobile-title" type="button" onClick={onOpenMenu}>
         <strong><span>{title}</span><Icon name="chevron" size={14} /></strong>
-        <small>{user.organizationName || "Chatballs"} · {pluralDialogs(total)}</small>
+        <small>{user.organizationName || "Chatballs"} · {tn("plural.conversations", total)}</small>
       </button>
       <Dropdown menu={{ items: menuItems }} open={open} onOpenChange={setOpen} trigger={["click"]} placement="bottomRight" overlayClassName="app-dropdown is-wide">
-        <button className="chat-mobile-avatar" type="button" aria-label="Меню пользователя"><Avatar user={user} /></button>
+        <button className="chat-mobile-avatar" type="button" aria-label={t("profile.user_menu")}><Avatar user={user} /></button>
       </Dropdown>
     </div>
   );
diff --git a/apps/internal-ui/src/layout/LaunchChecklist.tsx b/apps/internal-ui/src/layout/LaunchChecklist.tsx
index 8911c6a..75a9fd1 100644
--- a/apps/internal-ui/src/layout/LaunchChecklist.tsx
+++ b/apps/internal-ui/src/layout/LaunchChecklist.tsx
@@ -4,6 +4,7 @@ import { api } from "../api/client";
 import { Icon } from "../shared/icons";
 import type { RouteKey, SessionUser } from "../types";
 import type { SettingsSectionKey } from "../features/settings/sections";
+import { t } from "../i18n";
 
 // Блок «Запуск» в сайдбаре (SPEC-CHATBALLS-0031 §5, дизайн-базлайн v2 A1): три шага
 // с автоотметкой по факту, прогресс и primary-действие текущего шага.
@@ -28,9 +29,9 @@ type Step = {
 };
 
 const STEPS: Step[] = [
-  { key: "agentCreated", label: "Создать агента", action: "Создать агента", route: "agents", icon: "robot" },
-  { key: "connectionBound", label: "Подключить точку входа", action: "Подключить", route: "settings", section: "integrations", icon: "plug" },
-  { key: "employeeInvited", label: "Пригласить сотрудников", action: "Пригласить", route: "employees", icon: "team" },
+  { key: "agentCreated", label: t("profile.create_agent"), action: t("profile.create_agent"), route: "agents", icon: "robot" },
+  { key: "connectionBound", label: t("profile.connect_entry_point"), action: t("profile.connect"), route: "settings", section: "integrations", icon: "plug" },
+  { key: "employeeInvited", label: t("profile.invite_operators"), action: t("profile.invite"), route: "employees", icon: "team" },
 ];
 
 function storageKey(user: SessionUser): string {
@@ -79,8 +80,8 @@ export function LaunchChecklist({ user, setRoute, openSettings }: { user: Sessio
   return (
     <div className="launch-checklist">
       <div className="launch-checklist-head">
-        <div><strong>Запуск</strong><small>{doneCount} из {STEPS.length}</small></div>
-        <button aria-label="Скрыть" title="Скрыть" type="button" onClick={hide}>×</button>
+        <div><strong>{t("profile.getting_started")}</strong><small>{t("profile.getting_started_progress", { done: doneCount, total: STEPS.length })}</small></div>
+        <button aria-label={t("common.hide")} title={t("common.hide")} type="button" onClick={hide}>×</button>
       </div>
       <div className="launch-checklist-progress"><i style={{ width: `${Math.round((doneCount / STEPS.length) * 100)}%` }} /></div>
       <div className="launch-checklist-steps">
diff --git a/apps/internal-ui/src/layout/Sidebar.tsx b/apps/internal-ui/src/layout/Sidebar.tsx
index 58033e2..c44ddc2 100644
--- a/apps/internal-ui/src/layout/Sidebar.tsx
+++ b/apps/internal-ui/src/layout/Sidebar.tsx
@@ -10,6 +10,7 @@ import type { DialogScope } from "../features/conversations/ConversationWorkspac
 import { agentColorOf, groupColorOf, type ConversationCounters } from "../features/conversations/model";
 import { LaunchChecklist } from "./LaunchChecklist";
 import { SidebarUserMenu } from "./SidebarUserMenu";
+import { t } from "../i18n";
 
 // Сайдбар по дизайн-базлайну v2: у менеджера — плоские семь пунктов (A1, KB1) и
 // блок «Запуск»; у сотрудника разделов нет (§3) — сайдбар и есть фильтр списка
@@ -84,20 +85,20 @@ export function Sidebar({
 
   return (
     <aside className={`hub-sidebar ${railExpanded ? "is-rail-expanded" : ""} ${sidebarWidth.dragging ? "is-resizing" : ""}`} style={{ "--sidebar-width": `${sidebarWidth.width}px` } as CSSProperties}>
-      <div className="pane-resizer" role="separator" aria-orientation="vertical" aria-label="Ширина сайдбара" title="Потяните, двойной клик — сбросить" onPointerDown={sidebarWidth.onPointerDown} onDoubleClick={sidebarWidth.reset} />
+      <div className="pane-resizer" role="separator" aria-orientation="vertical" aria-label={t("profile.sidebar_width")} title={t("profile.drag_resize_double_click_reset")} onPointerDown={sidebarWidth.onPointerDown} onDoubleClick={sidebarWidth.reset} />
       <div className="hub-rail">
         <div className={`hub-brand-mark ${user.organizationLogoUrl ? "has-logo" : ""}`}>
           {user.organizationLogoUrl ? <img src={user.organizationLogoUrl} alt="" /> : <LogoIcon />}
         </div>
         <button
           className={`hub-rail-button ${route === "chat" ? "is-active" : ""}`}
-          title="Чат"
+          title={t("common.chat")}
           type="button"
           onClick={() => setRoute("chat")}
         >
           <Icon name="message" size={18} />
         </button>
-        <button className="hub-rail-button" title="Развернуть" type="button" onClick={() => setRailExpanded(true)}>
+        <button className="hub-rail-button" title={t("profile.expand")} type="button" onClick={() => setRailExpanded(true)}>
           <Icon name="chevron" size={17} />
         </button>
         <div className="hub-rail-spacer" />
@@ -105,10 +106,10 @@ export function Sidebar({
           {initials}
         </button>
       </div>
-      {railExpanded && <button className="hub-rail-backdrop" aria-label="Свернуть меню" type="button" onClick={() => setRailExpanded(false)} />}
+      {railExpanded && <button className="hub-rail-backdrop" aria-label={t("profile.collapse_menu")} type="button" onClick={() => setRailExpanded(false)} />}
       <div className="hub-sidebar-body" onClick={() => setRailExpanded(false)}>
       <div className="hub-brand">
-        <button className={`hub-brand-mark ${user.organizationLogoUrl ? "has-logo" : ""}`} type="button" aria-label="На главную" onClick={() => setRoute(defaultRoute(user))}>
+        <button className={`hub-brand-mark ${user.organizationLogoUrl ? "has-logo" : ""}`} type="button" aria-label={t("profile.go_start_page")} onClick={() => setRoute(defaultRoute(user))}>
           {user.organizationLogoUrl
             ? <img src={user.organizationLogoUrl} alt="" />
             : <LogoIcon />}
@@ -129,13 +130,13 @@ export function Sidebar({
       </div>
       {manager ? (
         <nav className="hub-nav">
-          <SidebarLink icon="message" label="Чат" badge={waitingCount > 0 ? String(waitingCount) : undefined} route={route} routeKey="chat" setRoute={setRoute} />
-          <SidebarLink activeRoutes={["salesClients", "salesClientDetail"]} icon="user" label="Контакты" route={route} routeKey="salesClients" setRoute={setRoute} />
-          <SidebarLink activeRoutes={["agents", "agentDetail"]} icon="robot" label="Агенты" route={route} routeKey="agents" setRoute={setRoute} />
-          <SidebarLink activeRoutes={["employees", "employeeDetail"]} icon="team" label="Сотрудники" route={route} routeKey="employees" setRoute={setRoute} />
-          <SidebarLink activeRoutes={["supportPortals", "supportPortalDetail", "supportPortalSettings"]} icon="globe" label="Порталы" route={route} routeKey="supportPortals" setRoute={setRoute} />
-          <SidebarLink activeRoutes={["knowledge", "knowledgeDetail", "knowledgeCreate", "knowledgeEdit", "knowledgeCategories", "knowledgeImport"]} icon="book" label="База знаний" route={route} routeKey="knowledge" setRoute={setRoute} />
-          <SidebarLink activeRoutes={["settings", "administrationAudit"]} icon="settings" label="Настройки" route={route} routeKey="settings" setRoute={setRoute} />
+          <SidebarLink icon="message" label={t("common.chat")} badge={waitingCount > 0 ? String(waitingCount) : undefined} route={route} routeKey="chat" setRoute={setRoute} />
+          <SidebarLink activeRoutes={["salesClients", "salesClientDetail"]} icon="user" label={t("common.contacts")} route={route} routeKey="salesClients" setRoute={setRoute} />
+          <SidebarLink activeRoutes={["agents", "agentDetail"]} icon="robot" label={t("common.agents")} route={route} routeKey="agents" setRoute={setRoute} />
+          <SidebarLink activeRoutes={["employees", "employeeDetail"]} icon="team" label={t("common.operators")} route={route} routeKey="employees" setRoute={setRoute} />
+          <SidebarLink activeRoutes={["supportPortals", "supportPortalDetail", "supportPortalSettings"]} icon="globe" label={t("common.portals")} route={route} routeKey="supportPortals" setRoute={setRoute} />
+          <SidebarLink activeRoutes={["knowledge", "knowledgeDetail", "knowledgeCreate", "knowledgeEdit", "knowledgeCategories", "knowledgeImport"]} icon="book" label={t("common.knowledge_base")} route={route} routeKey="knowledge" setRoute={setRoute} />
+          <SidebarLink activeRoutes={["settings", "administrationAudit"]} icon="settings" label={t("common.settings")} route={route} routeKey="settings" setRoute={setRoute} />
         </nav>
       ) : route === "profile" ? (
         /* Кадр P2: на «Профиле» у сотрудника сайдбар без навигации — фильтровать
@@ -180,19 +181,19 @@ function ChatScopeTree({
 
   return (
     <nav className="hub-nav chat-scope-tree">
-      <div className="chat-scope-head"><Icon name="message" size={17} /><span>Диалоги</span></div>
+      <div className="chat-scope-head"><Icon name="message" size={17} /><span>{t("common.conversations")}</span></div>
       <button
         className={`chat-scope-item is-top ${isActive({ kind: "all" }) ? "is-active" : ""}`}
         type="button"
         onClick={() => setScope({ kind: "all" })}
       >
         <Icon name="inbox" size={15} />
-        <span>Все диалоги</span>
+        <span>{t("profile.all_conversations")}</span>
         {counters && <small>{counters.all}</small>}
       </button>
       {counters && (
         <>
-          <div className="chat-scope-section"><Icon name="team" size={15} /><span>Группы</span></div>
+          <div className="chat-scope-section"><Icon name="team" size={15} /><span>{t("common.groups")}</span></div>
           {counters.groups.map((group) => (
             <button
               className={`chat-scope-item is-nested ${isActive({ kind: "group", id: group.id, label: group.name }) ? "is-active" : ""}`}
@@ -212,7 +213,7 @@ function ChatScopeTree({
               onClick={() => setScope({ kind: "ungrouped" })}
             >
               <i className="chat-scope-dot is-muted" />
-              <span>Без группы</span>
+              <span>{t("common.no_group")}</span>
               <small>{counters.ungrouped}</small>
             </button>
           )}
@@ -220,7 +221,7 @@ function ChatScopeTree({
       )}
       {counters && (
         <>
-          <div className="chat-scope-section"><Icon name="robot" size={15} /><span>Агенты</span></div>
+          <div className="chat-scope-section"><Icon name="robot" size={15} /><span>{t("common.agents")}</span></div>
           {counters.agents.map((agent) => (
             <button
               className={`chat-scope-item is-nested ${isActive({ kind: "agent", id: agent.id, label: agent.name }) ? "is-active" : ""}`}
diff --git a/apps/internal-ui/src/layout/SidebarUserMenu.tsx b/apps/internal-ui/src/layout/SidebarUserMenu.tsx
index b5b3ea9..2d9dd8e 100644
--- a/apps/internal-ui/src/layout/SidebarUserMenu.tsx
+++ b/apps/internal-ui/src/layout/SidebarUserMenu.tsx
@@ -4,22 +4,23 @@ import { useState } from "react";
 import type { RouteKey, SessionUser } from "../types";
 import { Icon } from "../shared/icons";
 import { Avatar } from "../shared/ui";
+import { t } from "../i18n";
 
 export function SidebarUserMenu({ user, route, setRoute, onLogout, unreadCount = 0, onOpenNotifications }: { user: SessionUser; route: RouteKey; setRoute: (route: RouteKey) => void; onLogout: () => void; unreadCount?: number; onOpenNotifications?: () => void }) {
   const [open, setOpen] = useState(false);
   const active = route === "profile";
   const menuItems = [
     ...(onOpenNotifications
-      ? [{ key: "notifications", label: <button type="button" onClick={onOpenNotifications}><Icon name="bell" size={15} />Уведомления{unreadCount > 0 && <b className="profile-menu-badge">{unreadCount > 99 ? "99+" : unreadCount}</b>}</button> }]
+      ? [{ key: "notifications", label: <button type="button" onClick={onOpenNotifications}><Icon name="bell" size={15} />{t("common.notifications")}{unreadCount > 0 && <b className="profile-menu-badge">{unreadCount > 99 ? "99+" : unreadCount}</b>}</button> }]
       : []),
     // «Настройки» — настройки системы, они в навигации, а не в меню пользователя.
-    { key: "profile", label: <button type="button" onClick={() => setRoute("profile")}><Icon name="user" size={15} />Профиль</button> },
+    { key: "profile", label: <button type="button" onClick={() => setRoute("profile")}><Icon name="user" size={15} />{t("common.profile")}</button> },
     { type: "divider" as const },
-    { key: "logout", label: <button type="button" className="danger" onClick={onLogout}><Icon name="logout" size={15} />Выйти</button> },
+    { key: "logout", label: <button type="button" className="danger" onClick={onLogout}><Icon name="logout" size={15} />{t("common.sign_out")}</button> },
   ];
   return (
     <Dropdown menu={{ items: menuItems }} open={open} onOpenChange={setOpen} trigger={["click"]} placement="topLeft" overlayClassName="app-dropdown is-wide">
-      <button className={`profile-link ${active ? "is-active" : ""}`} type="button" aria-label="Меню пользователя">
+      <button className={`profile-link ${active ? "is-active" : ""}`} type="button" aria-label={t("profile.user_menu")}>
         <span className="profile-avatar"><Avatar user={user} /><i /></span>
         <span><strong>{user.fullName || user.email}</strong><small>{user.email}</small></span>
         <span className="profile-more">{unreadCount > 0 && <i className="profile-unread" />}<Icon name="more" size={16} /></span>
diff --git a/apps/internal-ui/src/routes.ts b/apps/internal-ui/src/routes.ts
index 301acf1..e6ae477 100644
--- a/apps/internal-ui/src/routes.ts
+++ b/apps/internal-ui/src/routes.ts
@@ -1,24 +1,25 @@
 import type { RouteKey } from "./types";
+import { t } from "./i18n";
 
 export const routes: Record<RouteKey, string> = {
-  administrationAudit: "Аудит",
-  employeeDetail: "Сотрудники",
-  employees: "Сотрудники",
-  profile: "Профиль",
-  settings: "Настройки",
-  salesClientDetail: "Контакт",
-  salesClients: "Контакты",
-  chat: "Чат",
-  supportPortals: "Порталы",
-  supportPortalDetail: "Портал поддержки",
-  supportPortalSettings: "Настройки портала",
-  agents: "Агенты",
-  agentDetail: "Карточка агента",
-  knowledge: "База знаний",
-  knowledgeDetail: "Знание",
-  knowledgeCreate: "Новое знание",
-  knowledgeEdit: "Редактор знания",
-  knowledgeCategories: "Категории знаний",
-  knowledgeImport: "Импорт знаний",
-  aiUsage: "Использование AI",
+  administrationAudit: t("common.audit"),
+  employeeDetail: t("common.operators"),
+  employees: t("common.operators"),
+  profile: t("common.profile"),
+  settings: t("common.settings"),
+  salesClientDetail: t("common.contact"),
+  salesClients: t("common.contacts"),
+  chat: t("common.chat"),
+  supportPortals: t("common.portals"),
+  supportPortalDetail: t("shared.support_portal"),
+  supportPortalSettings: t("shared.portal_settings"),
+  agents: t("common.agents"),
+  agentDetail: t("shared.agent_card"),
+  knowledge: t("common.knowledge_base"),
+  knowledgeDetail: t("shared.knowledge_item"),
+  knowledgeCreate: t("shared.new_knowledge_item"),
+  knowledgeEdit: t("shared.knowledge_editor"),
+  knowledgeCategories: t("shared.knowledge_categories"),
+  knowledgeImport: t("shared.knowledge_import"),
+  aiUsage: t("shared.ai_usage"),
 };
diff --git a/apps/internal-ui/src/shared/Hint.tsx b/apps/internal-ui/src/shared/Hint.tsx
index cc6754a..791adc0 100644
--- a/apps/internal-ui/src/shared/Hint.tsx
+++ b/apps/internal-ui/src/shared/Hint.tsx
@@ -1,6 +1,7 @@
 import { useState, type ReactNode } from "react";
 
 import { Icon } from "./icons";
+import { t } from "../i18n";
 
 // Реестр inline-подсказок первого визита (дизайн-базлайн v2, кадр A1; §6 —
 // сотрудникам подсказки не показываются, это решает вызывающая сторона).
@@ -32,7 +33,7 @@ export function Hint({ id, children }: { id: string; children: ReactNode }) {
   return (
     <div className="hub-hint">
       <p>{children}</p>
-      <button aria-label="Скрыть подсказку" type="button" onClick={dismiss}><Icon name="xCircle" size={13} /></button>
+      <button aria-label={t("shared.hide_hint")} type="button" onClick={dismiss}><Icon name="xCircle" size={13} /></button>
     </div>
   );
 }
diff --git a/apps/internal-ui/src/shared/Pagination.tsx b/apps/internal-ui/src/shared/Pagination.tsx
index c651241..e0d4fb5 100644
--- a/apps/internal-ui/src/shared/Pagination.tsx
+++ b/apps/internal-ui/src/shared/Pagination.tsx
@@ -3,6 +3,7 @@ import type { ReactNode } from "react";
 import { Icon } from "./icons";
 import { paginationItems } from "./ui-controls";
 import "./pagination.css";
+import { t } from "../i18n";
 
 // Единственный подвал со страницами в приложении: списки порталов, статей,
 // контактов, сотрудников, агентов и журнал аудита. Страницу считает сервер —
@@ -27,7 +28,7 @@ export function Pagination({
       <span className="pager-note">{note}</span>
       <span className="pager-pages">
         <button
-          aria-label="Предыдущая страница"
+          aria-label={t("shared.previous_page")}
           className="pager-step"
           disabled={page <= 1}
           type="button"
@@ -52,7 +53,7 @@ export function Pagination({
             )
         ))}
         <button
-          aria-label="Следующая страница"
+          aria-label={t("shared.next_page")}
           className="pager-step"
           disabled={page >= pageCount}
           type="button"
diff --git a/apps/internal-ui/src/shared/appearance.ts b/apps/internal-ui/src/shared/appearance.ts
index 148f0cd..0d76748 100644
--- a/apps/internal-ui/src/shared/appearance.ts
+++ b/apps/internal-ui/src/shared/appearance.ts
@@ -1,3 +1,5 @@
+import { t } from "../i18n";
+
 // Применение персональной темы и акцента (SPEC-CHATBALLS-0031 §7, дизайн-базлайн v2).
 // Тема ставится атрибутом data-theme на <html>; акцент — переменной --accent,
 // из неё в CSS считаются --primary (в тёмной теме приглушён подложкой, как в
@@ -9,10 +11,10 @@ export const DEFAULT_ACCENT = "#1677ff";
 
 // Пресеты акцента из дизайн-базлайна v2 (Tweaks макета).
 export const ACCENT_PRESETS: Array<[string, string]> = [
-  ["#1677ff", "Синий"],
-  ["#6d5dfc", "Индиго"],
-  ["#0f9b8e", "Бирюзовый"],
-  ["#e8590c", "Оранжевый"],
+  ["#1677ff", t("shared.blue")],
+  ["#6d5dfc", t("shared.indigo")],
+  ["#0f9b8e", t("shared.teal")],
+  ["#e8590c", t("shared.orange")],
 ];
 
 const media = typeof window !== "undefined" && window.matchMedia
diff --git a/apps/internal-ui/src/shared/content-library/AgentLinkDialog.tsx b/apps/internal-ui/src/shared/content-library/AgentLinkDialog.tsx
index c949d7e..4f139a4 100644
--- a/apps/internal-ui/src/shared/content-library/AgentLinkDialog.tsx
+++ b/apps/internal-ui/src/shared/content-library/AgentLinkDialog.tsx
@@ -2,7 +2,7 @@ import { Modal } from "antd";
 import { useState } from "react";
 
 import { Button } from "../ui-controls";
-import { pluralRu } from "../utils";
+import { t, tn, type MessageKey } from "../../i18n";
 
 export type AgentLinkAction = "attach" | "detach";
 
@@ -18,11 +18,14 @@ export type AgentLinkOutcome = {
   skipped: number;
 };
 
-function outcomeText(outcome: AgentLinkOutcome, forms: [string, string, string]): string {
-  const verb = outcome.action === "attach" ? "Прикреплено" : "Откреплено";
-  const main = `${verb}: ${pluralRu(outcome.changed, forms)}.`;
+// Диалог не знает, что именно прикрепляют, — знания или статьи портала, — и
+// раньше принимал три формы слова пропсом. Теперь он принимает ключ словаря:
+// формы для каждого языка живут в словаре, а не в вызывающем коде.
+function outcomeText(outcome: AgentLinkOutcome, countKey: MessageKey): string {
+  const verb = outcome.action === "attach" ? t("shared.attached") : t("shared.detached");
+  const main = `${verb}: ${tn(countKey, outcome.changed)}.`;
   if (outcome.skipped === 0) return main;
-  return `${main} Пропущено: ${outcome.skipped}.`;
+  return `${main} ${t("shared.skipped_count", { count: outcome.skipped })}`;
 }
 
 /**
@@ -34,7 +37,7 @@ export function AgentLinkDialog({
   agents,
   busy,
   error,
-  forms,
+  countKey,
   outcome,
   title,
   onCancel,
@@ -43,7 +46,7 @@ export function AgentLinkDialog({
   agents: AgentLinkOption[];
   busy: boolean;
   error: string | null;
-  forms: [string, string, string];
+  countKey: MessageKey;
   outcome: AgentLinkOutcome | null;
   title: string;
   onCancel: () => void;
@@ -56,21 +59,21 @@ export function AgentLinkDialog({
     <Modal className="content-link-modal" open title={title} onCancel={onCancel} footer={null} destroyOnClose>
       <div className="content-dialog-body">
         {outcome ? (
-          <p className="content-dialog-outcome">{outcomeText(outcome, forms)}</p>
+          <p className="content-dialog-outcome">{outcomeText(outcome, countKey)}</p>
         ) : (
           <>
             <div className="content-dialog-field">
-              <span>Действие</span>
+              <span>{t("common.action")}</span>
               <div className="content-dialog-segmented">
-                <button className={action === "attach" ? "active" : ""} disabled={busy} type="button" onClick={() => setAction("attach")}>Прикрепить</button>
-                <button className={action === "detach" ? "active" : ""} disabled={busy} type="button" onClick={() => setAction("detach")}>Открепить</button>
+                <button className={action === "attach" ? "active" : ""} disabled={busy} type="button" onClick={() => setAction("attach")}>{t("common.attach")}</button>
+                <button className={action === "detach" ? "active" : ""} disabled={busy} type="button" onClick={() => setAction("detach")}>{t("common.detach")}</button>
               </div>
             </div>
             <label className="content-dialog-field content-dialog-select">
-              <span>Агент</span>
+              <span>{t("common.agent")}</span>
               <div>
                 <select disabled={busy || agents.length === 0} value={agentId ?? ""} onChange={(event) => setAgentId(event.target.value ? Number(event.target.value) : null)}>
-                  <option value="">Выберите агента</option>
+                  <option value="">{t("shared.pick_agent")}</option>
                   {agents.map((agent) => (
                     <option value={agent.id} key={agent.id}>
                       {agent.name}{agent.groupName ? ` · ${agent.groupName}` : ""}
@@ -79,16 +82,14 @@ export function AgentLinkDialog({
                 </select>
               </div>
             </label>
-            {agents.length === 0 && <div className="content-dialog-error">Нет агентов, которым можно прикрепить материалы.</div>}
+            {agents.length === 0 && <div className="content-dialog-error">{t("shared.there_no_agents_attach_material")}</div>}
           </>
         )}
         {error && <div className="content-dialog-error">{error}</div>}
         <div className="content-dialog-actions">
-          <Button variant="secondary" disabled={busy} onClick={onCancel}>{outcome ? "Закрыть" : "Отмена"}</Button>
+          <Button variant="secondary" disabled={busy} onClick={onCancel}>{outcome ? t("common.close") : t("common.cancel")}</Button>
           {!outcome && (
-            <Button variant="primary" disabled={busy || agentId === null} onClick={() => agentId !== null && onSubmit(agentId, action)}>
-              Применить
-            </Button>
+            <Button variant="primary" disabled={busy || agentId === null} onClick={() => agentId !== null && onSubmit(agentId, action)}>{t("profile.apply")}</Button>
           )}
         </div>
       </div>
diff --git a/apps/internal-ui/src/shared/content-library/CategoryManagementDialog.tsx b/apps/internal-ui/src/shared/content-library/CategoryManagementDialog.tsx
index 7b5a04c..e2a90e9 100644
--- a/apps/internal-ui/src/shared/content-library/CategoryManagementDialog.tsx
+++ b/apps/internal-ui/src/shared/content-library/CategoryManagementDialog.tsx
@@ -11,6 +11,7 @@ import {
   type ManagedContentCategory,
   type ManagedContentCategoryNode,
 } from "./categoryManagementModel";
+import { t } from "../../i18n";
 
 export type CategoryMutation = {
   name?: string;
@@ -20,16 +21,16 @@ export type CategoryMutation = {
 
 export function CategoryManagementDialog({
   categories,
-  createLabel = "Создать категорию",
-  deleteDescription = "Категорию можно удалить только после переноса вложенных категорий и материалов.",
-  errorMessage = "Не удалось изменить категории",
+  createLabel = t("shared.create_category"),
+  deleteDescription = t("shared.category_can_only_deleted_once"),
+  errorMessage = t("shared.could_not_change_categories"),
   onChanged,
   onClose,
   onCreate,
   onDelete,
   onUpdate,
-  subtitle = "Категория определяет только размещение, не доступ",
-  title = "Управление категориями",
+  subtitle = t("shared.category_decides_placement_only_not"),
+  title = t("shared.manage_categories"),
 }: {
   categories: ManagedContentCategory[];
   createLabel?: string;
@@ -97,7 +98,7 @@ export function CategoryManagementDialog({
       <Modal
         className="content-category-modal"
         destroyOnHidden
-        footer={<div className="content-category-modal-footer"><Button variant="secondary" icon="plus" disabled={busy} onClick={() => { setEditingId(null); setCreateParentId(null); setDraftName(""); }}>{createLabel}</Button><Button variant="primary" disabled={busy} onClick={onClose}>Готово</Button></div>}
+        footer={<div className="content-category-modal-footer"><Button variant="secondary" icon="plus" disabled={busy} onClick={() => { setEditingId(null); setCreateParentId(null); setDraftName(""); }}>{createLabel}</Button><Button variant="primary" disabled={busy} onClick={onClose}>{t("common.done")}</Button></div>}
         open title={<div className="content-category-modal-title"><strong>{title}</strong><span>{subtitle}</span></div>}
         width={560} onCancel={onClose}
       >
@@ -117,25 +118,25 @@ export function CategoryManagementDialog({
             key={category.id}
           />)}
           {createParentId === null && <div className="content-category-create root">
-            <input autoFocus placeholder="Название категории" value={draftName} onChange={(event) => setDraftName(event.target.value)} onKeyDown={(event) => {
+            <input autoFocus placeholder={t("shared.category_name")} value={draftName} onChange={(event) => setDraftName(event.target.value)} onKeyDown={(event) => {
               if (event.key === "Enter") saveCreate();
               if (event.key === "Escape") cancel();
             }} />
-            <button className="save" disabled={!draftName.trim()} type="button" onClick={saveCreate}>Сохранить</button>
-            <button type="button" onClick={cancel}>Отмена</button>
+            <button className="save" disabled={!draftName.trim()} type="button" onClick={saveCreate}>{t("common.save")}</button>
+            <button type="button" onClick={cancel}>{t("common.cancel")}</button>
           </div>}
           {error && <div className="content-category-error">{error}</div>}
         </div>
       </Modal>
       <DecisionDialog
         open={Boolean(deleting)} onClose={() => setDeleting(null)} tone="danger" icon="trash"
-        title="Удалить категорию?" description={deleteDescription}
-        actions={<><Button variant="secondary" onClick={() => setDeleting(null)}>Отмена</Button><Button variant="danger-outline" disabled={busy} onClick={() => {
+        title={t("shared.delete_category")} description={deleteDescription}
+        actions={<><Button variant="secondary" onClick={() => setDeleting(null)}>{t("common.cancel")}</Button><Button variant="danger-outline" disabled={busy} onClick={() => {
           if (!deleting) return;
           const id = deleting.id;
           setDeleting(null);
           void run(() => onDelete(id));
-        }}>Удалить</Button></>}
+        }}>{t("common.delete")}</Button></>}
       />
     </>
   );
diff --git a/apps/internal-ui/src/shared/content-library/CategoryManagementRow.tsx b/apps/internal-ui/src/shared/content-library/CategoryManagementRow.tsx
index 7d4b680..b265f0e 100644
--- a/apps/internal-ui/src/shared/content-library/CategoryManagementRow.tsx
+++ b/apps/internal-ui/src/shared/content-library/CategoryManagementRow.tsx
@@ -5,6 +5,7 @@ import type {
   CategoryDropPosition,
   ManagedContentCategoryNode,
 } from "./categoryManagementModel";
+import { t } from "../../i18n";
 
 function dropPosition(event: DragEvent<HTMLDivElement>, isSystem: boolean): CategoryDropPosition {
   const bounds = event.currentTarget.getBoundingClientRect();
@@ -53,8 +54,8 @@ export function CategoryManagementRow({
         if (event.key === "Enter") onSaveEdit(category);
         if (event.key === "Escape") onCancel();
       }} />
-      <button className="save" disabled={!draftName.trim()} type="button" onClick={() => onSaveEdit(category)}>Сохранить</button>
-      <button type="button" onClick={onCancel}>Отмена</button>
+      <button className="save" disabled={!draftName.trim()} type="button" onClick={() => onSaveEdit(category)}>{t("common.save")}</button>
+      <button type="button" onClick={onCancel}>{t("common.cancel")}</button>
     </div>
   );
   return (
@@ -75,20 +76,20 @@ export function CategoryManagementRow({
         <Icon name={category.children.length ? "chevron" : "folder"} size={14} />
         {editingId === category.id ? editor : <>
           <button className="content-category-name" disabled={locked} type="button" onClick={() => onStartEdit(category)}>{category.name}</button>
-          {locked && <span className="content-system-badge">СИСТ.</span>}
+          {locked && <span className="content-system-badge">{t("shared.sys")}</span>}
           <span className="content-category-count">{category.count}</span>
-          {!locked && <button aria-label={`Создать подкатегорию в ${category.name}`} className="content-category-action" type="button" onClick={() => onCreateChild(category.id)}><Icon name="plus" size={14} /></button>}
-          <button aria-label={`Удалить ${category.name}`} className="content-category-delete" disabled={!deletable} type="button" onClick={() => onDelete(category)}><Icon name="trash" size={14} /></button>
+          {!locked && <button aria-label={t("shared.create_subcategory_in", { name: category.name })} className="content-category-action" type="button" onClick={() => onCreateChild(category.id)}><Icon name="plus" size={14} /></button>}
+          <button aria-label={t("shared.delete_named", { name: category.name })} className="content-category-delete" disabled={!deletable} type="button" onClick={() => onDelete(category)}><Icon name="trash" size={14} /></button>
         </>}
       </div>
       {createParentId === category.id && (
         <div className="content-category-create" style={{ marginLeft: 50 + level * 20 }}>
-          <input autoFocus placeholder="Название категории" value={draftName} onChange={(event) => onDraftChange(event.target.value)} onKeyDown={(event) => {
+          <input autoFocus placeholder={t("shared.category_name")} value={draftName} onChange={(event) => onDraftChange(event.target.value)} onKeyDown={(event) => {
             if (event.key === "Enter") onSaveCreate();
             if (event.key === "Escape") onCancel();
           }} />
-          <button className="save" disabled={!draftName.trim()} type="button" onClick={onSaveCreate}>Сохранить</button>
-          <button type="button" onClick={onCancel}>Отмена</button>
+          <button className="save" disabled={!draftName.trim()} type="button" onClick={onSaveCreate}>{t("common.save")}</button>
+          <button type="button" onClick={onCancel}>{t("common.cancel")}</button>
         </div>
       )}
       {category.children.map((child) => <CategoryManagementRow
diff --git a/apps/internal-ui/src/shared/form-controls.css b/apps/internal-ui/src/shared/form-controls.css
index e60c387..04e762c 100644
--- a/apps/internal-ui/src/shared/form-controls.css
+++ b/apps/internal-ui/src/shared/form-controls.css
@@ -163,6 +163,14 @@
   font-size: 11.5px;
 }
 
+/* Пояснение под полем: тем же кеглем, что и ошибка, но приглушённое —
+   это подсказка, а не сигнал. */
+.form-field-hint {
+  color: var(--n-4);
+  font-size: 11.5px;
+  line-height: 1.4;
+}
+
 .form-field.is-invalid input {
   border-color: var(--error);
 }
diff --git a/apps/internal-ui/src/shared/form-controls.tsx b/apps/internal-ui/src/shared/form-controls.tsx
index 376cdf9..406eb4b 100644
--- a/apps/internal-ui/src/shared/form-controls.tsx
+++ b/apps/internal-ui/src/shared/form-controls.tsx
@@ -44,7 +44,10 @@ export function FormField({
   );
 }
 
-export function SelectField({ disabled = false, label, value, onChange, options }: { disabled?: boolean; label: string; value: string; onChange: (value: string) => void; options: Array<[string, string]> }) {
+// hint — пояснение под полем: у части настроек выбор непонятен без одной
+// фразы («Как в установке» — это какой?), а класть её отдельным абзацем рядом
+// значит оторвать от поля, к которому она относится.
+export function SelectField({ disabled = false, label, value, onChange, options, hint }: { disabled?: boolean; label: string; value: string; onChange: (value: string) => void; options: Array<[string, string]>; hint?: string }) {
   return (
     <label className="readonly-field select-like">
       <span>{label}</span>
@@ -52,6 +55,7 @@ export function SelectField({ disabled = false, label, value, onChange, options
         {options.map(([optionValue, labelText]) => <option value={optionValue} key={optionValue}>{labelText}</option>)}
       </select>
       <Icon name="chevron" size={14} />
+      {hint && <small className="form-field-hint">{hint}</small>}
     </label>
   );
 }
diff --git a/apps/internal-ui/src/shared/markdown/markdownTools.ts b/apps/internal-ui/src/shared/markdown/markdownTools.ts
index 3b2121b..9c02ebb 100644
--- a/apps/internal-ui/src/shared/markdown/markdownTools.ts
+++ b/apps/internal-ui/src/shared/markdown/markdownTools.ts
@@ -1,4 +1,6 @@
 import type { Icon } from "../icons";
+import { fmt, t, tn } from "../../i18n";
+import { readableSize } from "../utils";
 
 type IconName = Parameters<typeof Icon>[0]["name"];
 
@@ -31,7 +33,9 @@ const LINE_PREFIXES: Record<string, string> = {
   quote: "> ",
 };
 
-const TABLE_SNIPPET = "\n| Колонка | Колонка |\n| ------- | ------- |\n| Значение | Значение |\n";
+// Заголовки в шаблоне таблицы переводятся, поэтому это функция, а не
+// константа: константу посчитали бы один раз, ещё до выбора языка.
+const tableSnippet = () => t("shared.table_template");
 
 /** Применение кнопки панели к тексту с учётом выделения (кадр PT7). */
 export function applyMarkdownTool(
@@ -65,7 +69,7 @@ export function applyMarkdownTool(
   }
 
   if (key === "link") {
-    const label = selected || "текст ссылки";
+    const label = selected || t("shared.link_text");
     const snippet = `[${label}](https://)`;
     const next = `${value.slice(0, selectionStart)}${snippet}${value.slice(selectionEnd)}`;
     const linkStart = selectionStart + snippet.length - 9;
@@ -73,8 +77,8 @@ export function applyMarkdownTool(
   }
 
   if (key === "table") {
-    const next = `${value.slice(0, selectionStart)}${TABLE_SNIPPET}${value.slice(selectionEnd)}`;
-    const caret = selectionStart + TABLE_SNIPPET.length;
+    const next = `${value.slice(0, selectionStart)}${tableSnippet()}${value.slice(selectionEnd)}`;
+    const caret = selectionStart + tableSnippet().length;
     return { value: next, selectionStart: caret, selectionEnd: caret };
   }
 
@@ -92,12 +96,11 @@ export function isImageFile(contentType: string, name: string): boolean {
 
 /** «4 280 знаков · 12 абзацев» — статусная строка редактора. */
 export function editorStats(value: string): string {
-  const characters = value.length.toLocaleString("ru-RU");
   const paragraphs = value.split(/\n{2,}/).filter((block) => block.trim()).length;
-  const forms = paragraphs % 10 === 1 && paragraphs % 100 !== 11 ? "абзац"
-    : [2, 3, 4].includes(paragraphs % 10) && ![12, 13, 14].includes(paragraphs % 100) ? "абзаца"
-      : "абзацев";
-  return `${characters} знаков · ${paragraphs} ${forms}`;
+  return t("shared.characters_and_paragraphs", {
+    characters: fmt.number(value.length),
+    paragraphs: tn("plural.paragraphs", paragraphs),
+  });
 }
 
 /** «Строка 18, столбец 24» — позиция курсора в статусной строке. */
@@ -105,15 +108,12 @@ export function cursorPosition(value: string, caret: number): string {
   const before = value.slice(0, caret);
   const line = before.split("\n").length;
   const column = caret - (before.lastIndexOf("\n") + 1) + 1;
-  return `Строка ${line}, столбец ${column}`;
+  return t("shared.line_column", { line, column });
 }
 
 /** «PNG · 240 КБ» — метаданные файла в рейке. */
 export function fileMeta(name: string, size: number): string {
   const extension = (name.split(".").pop() ?? "").toLocaleUpperCase();
-  const kilobytes = size / 1024;
-  const readable = kilobytes >= 1024
-    ? `${(kilobytes / 1024).toLocaleString("ru-RU", { maximumFractionDigits: 1 })} МБ`
-    : `${Math.max(1, Math.round(kilobytes)).toLocaleString("ru-RU")} КБ`;
+  const readable = readableSize(size);
   return extension ? `${extension} · ${readable}` : readable;
 }
diff --git a/apps/internal-ui/src/shared/providers.ts b/apps/internal-ui/src/shared/providers.ts
index 2682988..5153e25 100644
--- a/apps/internal-ui/src/shared/providers.ts
+++ b/apps/internal-ui/src/shared/providers.ts
@@ -1,3 +1,5 @@
+import { t } from "../i18n";
+
 /* Провайдеры подключений: MAX / Telegram / Web Chat / Email.
 
    Общий словарь для всего приложения — раньше он лежал в демо-данных диалогов,
@@ -35,7 +37,7 @@ export const channelMap = {
   EMAIL: { full: "Email", color: "#d48806", bg: "color-mix(in srgb, #fa8c16 14%, var(--surface-card))" },
   MAX: { full: "MAX", color: "#5b5bd6", bg: "color-mix(in srgb, #5b5bd6 14%, var(--surface-card))" },
   TG: { full: "Telegram", color: "#229ed9", bg: "color-mix(in srgb, #229ed9 14%, var(--surface-card))" },
-  WEB: { full: "Web-виджет", color: "#0f9b8e", bg: "color-mix(in srgb, #0f9b8e 14%, var(--surface-card))" },
+  WEB: { full: t("common.web_widget"), color: "#0f9b8e", bg: "color-mix(in srgb, #0f9b8e 14%, var(--surface-card))" },
 } satisfies Record<ProviderKey, { full: string; color: string; bg: string }>;
 
 export function providerLabel(code: string): string {
diff --git a/apps/internal-ui/src/shared/ui-controls.tsx b/apps/internal-ui/src/shared/ui-controls.tsx
index ba96f39..b3a8e66 100644
--- a/apps/internal-ui/src/shared/ui-controls.tsx
+++ b/apps/internal-ui/src/shared/ui-controls.tsx
@@ -2,6 +2,7 @@ import { Dropdown } from "antd";
 import { useEffect, useRef, useState, type ButtonHTMLAttributes, type ReactNode, type RefObject } from "react";
 
 import { Icon } from "./icons";
+import { t } from "../i18n";
 
 type IconName = Parameters<typeof Icon>[0]["name"];
 
@@ -62,8 +63,8 @@ export function CopyButton({ value, className = "", label }: { value: string; cl
     <button
       type="button"
       className={`${className} ${copied ? "is-copied" : ""}`.trim()}
-      aria-label="Скопировать"
-      title={copied ? "Скопировано" : "Скопировать"}
+      aria-label={t("common.copy_clipboard")}
+      title={copied ? t("common.copied") : t("common.copy_clipboard")}
       onClick={(event) => {
         event.stopPropagation();
         void navigator.clipboard?.writeText(value).then(() => {
@@ -73,7 +74,7 @@ export function CopyButton({ value, className = "", label }: { value: string; cl
       }}
     >
       <Icon name={copied ? "check" : "copy"} size={13} strokeWidth={label ? 2 : 1.8} />
-      {label && (copied ? "Скопировано" : label)}
+      {label && (copied ? t("common.copied") : label)}
     </button>
   );
 }
diff --git a/apps/internal-ui/src/shared/ui.tsx b/apps/internal-ui/src/shared/ui.tsx
index 4ceae10..9854aba 100644
--- a/apps/internal-ui/src/shared/ui.tsx
+++ b/apps/internal-ui/src/shared/ui.tsx
@@ -7,6 +7,7 @@ import { Icon, LogoSpinner } from "./icons";
 type IconName = Parameters<typeof Icon>[0]["name"];
 import { Button } from "./ui-controls";
 import { initials } from "./utils";
+import { t } from "../i18n";
 
 export function Avatar({ user, employee, background }: { user?: SessionUser; employee?: Employee; background?: string }) {
   const label = employee ? initials(employee.fullName, employee.email) : initials(user?.fullName ?? "", user?.email ?? "");
@@ -30,18 +31,18 @@ export type StatusPillKey = "normal" | "active" | "published" | "blocked" | "dis
 
 export function StatusPill({ status, label: labelOverride }: { status: StatusPillKey; label?: string }) {
   const map = {
-    normal: ["var(--success-bg)", "var(--success-border)", "var(--success-text)", "Работает"],
-    active: ["transparent", "transparent", "var(--success-text)", "Активен"],
-    published: ["var(--success-bg)", "var(--success-border)", "var(--success-text)", "Опубликован"],
-    blocked: ["transparent", "transparent", "var(--error-text)", "Заблокирован"],
-    disabled: ["transparent", "transparent", "var(--warning-text)", "Неактивен"],
-    invited: ["transparent", "transparent", "var(--primary-text)", "Приглашён"],
-    archived: ["var(--n-9)", "var(--n-7)", "var(--n-4)", "Архивный"],
-    draft: ["var(--n-10)", "var(--n-7)", "var(--n-4)", "Черновик"],
-    healthy: ["var(--success-bg)", "var(--success-border)", "var(--success-text)", "Работает"],
-    error: ["var(--error-bg)", "var(--error-border)", "var(--error-text)", "Ошибка"],
-    pending: ["var(--warning-bg)", "var(--warning-border)", "var(--warning-text)", "Проверяется"],
-    unchecked: ["var(--n-10)", "var(--n-7)", "var(--n-4)", "Не проверялось"],
+    normal: ["var(--success-bg)", "var(--success-border)", "var(--success-text)", t("shared.running")],
+    active: ["transparent", "transparent", "var(--success-text)", t("shared.active")],
+    published: ["var(--success-bg)", "var(--success-border)", "var(--success-text)", t("shared.published")],
+    blocked: ["transparent", "transparent", "var(--error-text)", t("shared.blocked")],
+    disabled: ["transparent", "transparent", "var(--warning-text)", t("shared.inactive")],
+    invited: ["transparent", "transparent", "var(--primary-text)", t("shared.invited")],
+    archived: ["var(--n-9)", "var(--n-7)", "var(--n-4)", t("shared.archived")],
+    draft: ["var(--n-10)", "var(--n-7)", "var(--n-4)", t("common.draft")],
+    healthy: ["var(--success-bg)", "var(--success-border)", "var(--success-text)", t("shared.running")],
+    error: ["var(--error-bg)", "var(--error-border)", "var(--error-text)", t("common.error")],
+    pending: ["var(--warning-bg)", "var(--warning-border)", "var(--warning-text)", t("shared.checking")],
+    unchecked: ["var(--n-10)", "var(--n-7)", "var(--n-4)", t("shared.never_checked")],
   } as const;
   const [bg, border, color, label] = map[status];
   const dotStyle = status === "archived"
@@ -51,9 +52,9 @@ export function StatusPill({ status, label: labelOverride }: { status: StatusPil
 }
 
 const ROLE_LABELS: Record<Role, string> = {
-  OWNER: "Владелец",
-  ADMIN: "Администратор",
-  EMPLOYEE: "Сотрудник",
+  OWNER: t("common.owner"),
+  ADMIN: t("common.administrator"),
+  EMPLOYEE: t("common.operator"),
 };
 
 export function roleLabel(role: Role): string {
@@ -111,16 +112,16 @@ export function LoadingScreen() {
 }
 
 export function ErrorScreen({ retry }: { retry: () => void }) {
-  return <main className="state-screen"><div className="state-card"><strong>Ошибка загрузки</strong><Button variant="primary" onClick={retry}>Повторить</Button></div></main>;
+  return <main className="state-screen"><div className="state-card"><strong>{t("shared.loading_failed")}</strong><Button variant="primary" onClick={retry}>{t("common.try_again")}</Button></div></main>;
 }
 
 export function PermissionScreen({ onReturn }: { onReturn: () => void }) {
   return (
     <main className="state-screen">
       <div className="state-card">
-        <strong>403 · Доступ запрещён</strong>
-        <span>У вашей роли нет доступа к этому разделу.</span>
-        <Button variant="primary" onClick={onReturn}>Вернуться</Button>
+        <strong>{t("shared.403_access_denied")}</strong>
+        <span>{t("shared.role_has_no_access_section")}</span>
+        <Button variant="primary" onClick={onReturn}>{t("shared.go_back")}</Button>
       </div>
     </main>
   );
diff --git a/apps/internal-ui/src/shared/usePagedResource.ts b/apps/internal-ui/src/shared/usePagedResource.ts
index ba8d1e6..ce51316 100644
--- a/apps/internal-ui/src/shared/usePagedResource.ts
+++ b/apps/internal-ui/src/shared/usePagedResource.ts
@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from "react";
+import { t } from "../i18n";
 
 // Постраничный список: страницу и фильтры считает сервер, здесь — только
 // состояние страницы и защита от гонок. Смена любого фильтра возвращает на
@@ -35,7 +36,7 @@ export type PagedResource<T, P> = {
 export function usePagedResource<P extends PagedPayload<unknown>>(
   load: (page: number) => Promise<P>,
   filters: unknown,
-  errorMessage = "Не удалось загрузить список",
+  errorMessage = t("shared.could_not_load_list"),
 ): PagedResource<P["items"][number], P> {
   const [payload, setPayload] = useState<P | null>(null);
   const [loading, setLoading] = useState(true);
diff --git a/apps/internal-ui/src/shared/utils.ts b/apps/internal-ui/src/shared/utils.ts
index 691c729..2851bde 100644
--- a/apps/internal-ui/src/shared/utils.ts
+++ b/apps/internal-ui/src/shared/utils.ts
@@ -1,3 +1,5 @@
+import { fmt, t } from "../i18n";
+
 export function initials(name: string, email: string): string {
   const source = name.trim() || email.split("@")[0] || "CB";
   const parts = source.split(/\s+/).filter(Boolean);
@@ -5,19 +7,19 @@ export function initials(name: string, email: string): string {
   return source.slice(0, 2).toUpperCase();
 }
 
+// Даты и числа считает общий модуль языка: список месяцев, порядок слов и
+// разделители разрядов у каждого языка свои, и держать их здесь значило бы
+// иметь вторую копию правил для виджета. Обёртки оставлены, чтобы не править
+// две сотни мест вызова: имена те же, поведение теперь зависит от языка.
+
+/** «2 сентября 2026 г.» / «2 September 2026». */
 export function formatDate(value: string): string {
-  return new Intl.DateTimeFormat("ru-RU", { day: "2-digit", month: "long", year: "numeric" }).format(new Date(value));
+  return fmt.fullDate(value);
 }
 
-/** Склонение по числу: pluralRu(3, ["портал", "портала", "порталов"]) → «3 портала». */
-export function pluralRu(count: number, forms: [string, string, string]): string {
-  const n = Math.abs(count) % 100;
-  const n1 = n % 10;
-  const form = n > 10 && n < 20 ? forms[2] : n1 > 1 && n1 < 5 ? forms[1] : n1 === 1 ? forms[0] : forms[2];
-  return `${count} ${form}`;
-}
-
-/** Подпись часового пояса со смещением: «Europe/Moscow · UTC+3» (кадр N1). */
+/** Подпись часового пояса со смещением: «Europe/Moscow · UTC+3» (кадр N1).
+ *  Тег en-US здесь не язык интерфейса, а формат смещения: строка «GMT+03:00»
+ *  разбирается регуляркой, и локаль подобрана под неё, а не под читателя. */
 export function timezoneLabel(zone: string, now = new Date()): string {
   try {
     const parts = new Intl.DateTimeFormat("en-US", { timeZone: zone, timeZoneName: "longOffset" }).formatToParts(now);
@@ -32,34 +34,30 @@ export function timezoneLabel(zone: string, now = new Date()): string {
   }
 }
 
-// Даты дизайн-базлайна v2 пишутся коротким месяцем без точки: «2 сен, 14:12»
-// (кадры N1/N3/N6/N7). Intl даёт «2 сент.», поэтому месяц берём из списка.
-const SHORT_MONTHS = ["янв", "фев", "мар", "апр", "мая", "июн", "июл", "авг", "сен", "окт", "ноя", "дек"];
-
+/** «2 сен» / «Sep 2» — короткий месяц без точки (кадры N1/N3/N6/N7). */
 export function shortDate(value: string | Date): string {
-  const date = value instanceof Date ? value : new Date(value);
-  if (Number.isNaN(date.getTime())) return "";
-  return `${date.getDate()} ${SHORT_MONTHS[date.getMonth()]}`;
+  return fmt.shortDate(value);
 }
 
-/** «12 авг 2026» — короткий месяц без точки плюс год (кадры E1/E3, G3). */
+/** «12 авг 2026» / «Aug 12 2026» (кадры E1/E3, G3). */
 export function shortDateYear(value: string | Date): string {
-  const date = value instanceof Date ? value : new Date(value);
-  if (Number.isNaN(date.getTime())) return "";
-  return `${shortDate(date)} ${date.getFullYear()}`;
+  return fmt.shortDateYear(value);
 }
 
+/** «2 сен, 14:12» / «Sep 2, 14:12». */
 export function shortDateTime(value: string | Date): string {
-  const date = value instanceof Date ? value : new Date(value);
-  if (Number.isNaN(date.getTime())) return "";
-  const time = date.toLocaleTimeString("ru-RU", { hour: "2-digit", minute: "2-digit" });
-  return `${shortDate(date)}, ${time}`;
+  return fmt.shortDateTime(value);
 }
 
-/** «янв 2026» — дата вступления в организацию в шапке «Профиля» (кадр P1).
- *  Стоит после предлога «с», поэтому месяц в родительном падеже — «с мая». */
+/** «янв 2026» — дата вступления в организацию в шапке «Профиля» (кадр P1). */
 export function monthYear(value: string | Date): string {
-  const date = value instanceof Date ? value : new Date(value);
-  if (Number.isNaN(date.getTime())) return "";
-  return `${SHORT_MONTHS[date.getMonth()]} ${date.getFullYear()}`;
+  return fmt.monthYear(value);
+}
+
+/** «1,4 МБ» / «1.4 MB» — размер файла на языке интерфейса.
+ *  Ниже мегабайта округляется до килобайт: доли килобайта в интерфейсе
+ *  не нужны, а «0,3 КБ» рядом с именем файла читается хуже, чем «1 КБ». */
+export function readableSize(bytes: number): string {
+  const { value, unit } = fmt.bytes(bytes);
+  return t(unit === "mb" ? "unit.mb" : "unit.kb", { value });
 }
diff --git a/apps/internal-ui/src/types.ts b/apps/internal-ui/src/types.ts
index 908743d..37622d8 100644
--- a/apps/internal-ui/src/types.ts
+++ b/apps/internal-ui/src/types.ts
@@ -45,6 +45,11 @@ export type AuthenticatedUser = {
   memberships: OrganizationMembership[];
   uiTheme: "LIGHT" | "DARK" | "SYSTEM";
   uiAccent: string;
+  // Личный выбор языка: пустая строка — «как в организации».
+  uiLanguage: string;
+  // Язык, на котором сервер отвечает этому человеку прямо сейчас: уже
+  // разрешён по цепочке профиль → организация → установка.
+  language: string;
 };
 
 export type SessionUser = AuthenticatedUser & OrganizationMembership;
diff --git a/apps/web-chat/src/App.tsx b/apps/web-chat/src/App.tsx
index a4f2d55..e34fa4e 100644
--- a/apps/web-chat/src/App.tsx
+++ b/apps/web-chat/src/App.tsx
@@ -23,6 +23,7 @@ import { CallInviteBanner, ChatBody, ChatComposer, ChatHeader, StartChatFooter }
 import { useScrollToLatest } from "./useScrollToLatest";
 import { useVoiceRecorder } from "./useVoiceRecorder";
 import { useWidgetActivity } from "./widgetActivity";
+import { applyWidgetLanguage, t } from "./i18n";
 
 const PARAMS = new URLSearchParams(location.search);
 const WIDGET_KEY = PARAMS.get("widgetKey") || "";
@@ -60,13 +61,20 @@ export function App() {
     onSend: async (audio, durationSeconds) => {
       if (!token) return;
       const ok = await sendVoice(token, audio, durationSeconds);
-      if (!ok) throw new Error("Не удалось отправить голосовое");
+      if (!ok) throw new Error(t("chat.could_not_send_voice"));
       try { ingestPoll(await poll(token, lastId.current)); } catch { /* polling loop will retry */ }
     },
   });
 
   useEffect(() => {
-    getConfig(ENTRY, HOST_ORIGIN).then(setConfig).catch(() => setConfig({ available: false }));
+    getConfig(ENTRY, HOST_ORIGIN)
+      .then((loaded) => {
+        // Язык приходит вместе с настройками. Ставится до setConfig: рендер,
+        // который они вызовут, уже пройдёт на нужном языке.
+        applyWidgetLanguage(loaded.language);
+        setConfig(loaded);
+      })
+      .catch(() => setConfig({ available: false }));
   }, []);
 
   function ingestPoll(data: Poll, notify = true) {
@@ -106,7 +114,7 @@ export function App() {
   }, [scrollToLatest, messages, pending, awaiting]);
 
   const accent = config?.accent || "#1677ff";
-  const title = config?.title || "Чат";
+  const title = config?.title || t("chat.chat");
   const letter = title.trim()[0]?.toUpperCase() || "E";
 
   function forgetSession() {
@@ -143,7 +151,7 @@ export function App() {
     setAwaiting(true);
     if (file) {
       const ok = await sendFile(token, file, text).catch(() => false);
-      if (!ok) setAttachmentError("Не удалось отправить файл");
+      if (!ok) setAttachmentError(t("chat.could_not_send_file"));
     } else {
       await sendMessage(token, text).catch(() => undefined);
     }
@@ -180,10 +188,10 @@ export function App() {
   const lastContactRequestId = messages.reduce((current, message) => message.kind === "contact_request" ? message.id : current, 0);
   const showPhoneForm = lastContactRequestId > 0 && !(contactSent || messages.some((message) => message.kind === "contact"));
   const status = state === "operator"
-    ? { label: "Отвечает специалист", dot: "#52c41a" }
+    ? { label: t("chat.operator_answering"), dot: "#52c41a" }
     : state === "waiting"
-      ? { label: "Передаём оператору", dot: "#faad14" }
-      : { label: "Виртуальный помощник", dot: "#52c41a" };
+      ? { label: t("chat.passing_to_operator"), dot: "#faad14" }
+      : { label: t("chat.virtual_assistant"), dot: "#52c41a" };
   const unavailable = config !== null && !config.available;
 
   return (
@@ -192,7 +200,7 @@ export function App() {
       <ChatBody bodyRef={bodyRef} config={config} unavailable={unavailable} accepted={accepted} accent={accent} letter={letter} title={title} messages={messages} pending={pending} awaiting={awaiting} lastContactRequestId={lastContactRequestId} showPhoneForm={showPhoneForm} onSubmitContact={submitContact} audioUrlFor={token ? (id) => voiceAudioUrl(token, id) : undefined} attachmentUrlFor={token ? (id, inline) => attachmentUrl(token, id, inline) : undefined} />
       {config?.available && accepted && call && (call.status === "REQUESTED" || call.status === "RINGING") && <CallInviteBanner call={call} accent={accent} onAccept={() => void acceptCallInvite()} onDecline={() => void declineCallInvite()} />}
       {config?.available && !accepted && <StartChatFooter accent={accent} starting={starting} onAccept={() => void accept()} />}
-      {config?.available && accepted && <ChatComposer accent={accent} state={state} quickReplies={config.quickReplies ?? []} pendingCount={pending.length} messageCount={messages.length} input={input} onInput={setInput} onSend={() => void send()} voice={config.features?.voiceMessages === false ? undefined : recorder} attachment={{ file: attachment, errorText: attachmentError, pick: (file) => { if (!file) return; if (file.size > MAX_FILE_BYTES) { setAttachmentError("Файл больше 20 МБ"); return; } setAttachmentError(""); setAttachment(file); }, clear: () => setAttachment(null) }} />}
+      {config?.available && accepted && <ChatComposer accent={accent} state={state} quickReplies={config.quickReplies ?? []} pendingCount={pending.length} messageCount={messages.length} input={input} onInput={setInput} onSend={() => void send()} voice={config.features?.voiceMessages === false ? undefined : recorder} attachment={{ file: attachment, errorText: attachmentError, pick: (file) => { if (!file) return; if (file.size > MAX_FILE_BYTES) { setAttachmentError(t("chat.file_too_big")); return; } setAttachmentError(""); setAttachment(file); }, clear: () => setAttachment(null) }} />}
     </div>
   );
 }
diff --git a/apps/web-chat/src/ChatView.tsx b/apps/web-chat/src/ChatView.tsx
index aca894a..569da45 100644
--- a/apps/web-chat/src/ChatView.tsx
+++ b/apps/web-chat/src/ChatView.tsx
@@ -2,6 +2,7 @@ import { useEffect, useRef, useState, type RefObject } from "react";
 
 import { isVideoCall, type CallInfo, type WebConfig, type WebMessage } from "./api";
 import type { useVoiceRecorder } from "./useVoiceRecorder";
+import { fmt, t } from "./i18n";
 
 export type ComposerVoice = ReturnType<typeof useVoiceRecorder>;
 
@@ -17,10 +18,10 @@ export function ChatHeader({ accent, letter, title, statusLabel, statusDot, unav
         <div style={{ fontSize: 14.5, fontWeight: 600, color: "#fff", lineHeight: 1.2 }}>{title}</div>
         <div style={{ display: "flex", alignItems: "center", gap: 6, marginTop: 2 }}>
           <span style={{ width: 7, height: 7, borderRadius: "50%", background: statusDot, flex: "none" }} />
-          <span style={{ fontSize: 11.5, color: "rgba(255,255,255,0.92)" }}>{unavailable ? "Временно недоступен" : statusLabel}</span>
+          <span style={{ fontSize: 11.5, color: "rgba(255,255,255,0.92)" }}>{unavailable ? t("chat.temporarily_unavailable") : statusLabel}</span>
         </div>
       </div>
-      <button onClick={onClose} aria-label="Свернуть" style={{ width: 30, height: 30, borderRadius: 8, border: "none", background: "rgba(255,255,255,0.14)", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}>
+      <button onClick={onClose} aria-label={t("chat.collapse")} style={{ width: 30, height: 30, borderRadius: 8, border: "none", background: "rgba(255,255,255,0.14)", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}>
         <svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#fff" strokeWidth="2.2" strokeLinecap="round" strokeLinejoin="round"><line x1="5" y1="12" x2="19" y2="12" /></svg>
       </button>
     </div>
@@ -46,16 +47,16 @@ export function ChatBody({ bodyRef, config, unavailable, accepted, accent, lette
 }) {
   return (
     <div ref={bodyRef} style={{ flex: 1, minHeight: 0, overflowY: "auto", background: "#f7f8fa", padding: "18px 16px" }}>
-      {config === null && <div style={{ textAlign: "center", color: "#8c8c8c", padding: 24, fontSize: 13 }}>Загрузка…</div>}
+      {config === null && <div style={{ textAlign: "center", color: "#8c8c8c", padding: 24, fontSize: 13 }}>{t("chat.loading")}</div>}
       {unavailable && <Unavailable />}
       {config?.available && !accepted && <Consent config={config} accent={accent} letter={letter} title={title} />}
       {config?.available && accepted && (
         <>
-          <div style={{ textAlign: "center", marginBottom: 14 }}><span style={{ display: "inline-block", padding: "3px 11px", borderRadius: 20, background: "#eef0f2", fontSize: 11, color: "#8c8c8c" }}>Сегодня</span></div>
+          <div style={{ textAlign: "center", marginBottom: 14 }}><span style={{ display: "inline-block", padding: "3px 11px", borderRadius: 20, background: "#eef0f2", fontSize: 11, color: "#8c8c8c" }}>{t("chat.today")}</span></div>
           {config.greeting && <Bubble author="ai" text={config.greeting} accent={accent} />}
           {messages.map((message) => message.author === "system"
             ? <SystemMessage key={message.id} text={message.text} />
-            : <div key={message.id}><Bubble author={message.author} text={message.hasAudio ? "" : message.text || (message.kind === "voice" ? "Голосовое сообщение" : "")} accent={accent} time={message.createdAt} audioUrl={message.hasAudio && audioUrlFor ? audioUrlFor(message.id) : undefined} attachment={message.kind === "file" && message.attachment ? { ...message.attachment, url: message.attachment.available && attachmentUrlFor ? attachmentUrlFor(message.id, false) : "", inlineUrl: message.attachment.available && attachmentUrlFor ? attachmentUrlFor(message.id, true) : "" } : undefined} />{message.kind === "contact_request" && message.id === lastContactRequestId && showPhoneForm && <PhoneForm accent={accent} onSubmit={onSubmitContact} />}</div>)}
+            : <div key={message.id}><Bubble author={message.author} text={message.hasAudio ? "" : message.text || (message.kind === "voice" ? t("chat.voice_message") : "")} accent={accent} time={message.createdAt} audioUrl={message.hasAudio && audioUrlFor ? audioUrlFor(message.id) : undefined} attachment={message.kind === "file" && message.attachment ? { ...message.attachment, url: message.attachment.available && attachmentUrlFor ? attachmentUrlFor(message.id, false) : "", inlineUrl: message.attachment.available && attachmentUrlFor ? attachmentUrlFor(message.id, true) : "" } : undefined} />{message.kind === "contact_request" && message.id === lastContactRequestId && showPhoneForm && <PhoneForm accent={accent} onSubmit={onSubmitContact} />}</div>)}
           {pending.map((text, index) => <Bubble key={`p${index}`} author="client" text={text} accent={accent} pendingState />)}
           {awaiting && <Typing />}
         </>
@@ -65,11 +66,11 @@ export function ChatBody({ bodyRef, config, unavailable, accepted, accent, lette
 }
 
 function Unavailable() {
-  return <div style={{ display: "flex", flexDirection: "column", alignItems: "center", textAlign: "center", padding: "26px 14px" }}><div style={{ width: 52, height: 52, borderRadius: "50%", background: "#fff7e6", display: "flex", alignItems: "center", justifyContent: "center", marginBottom: 14 }}><svg viewBox="0 0 24 24" width="26" height="26" fill="none" stroke="#d48806" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"><path d="M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0Z" /><line x1="12" y1="9" x2="12" y2="13" /><line x1="12" y1="17" x2="12.01" y2="17" /></svg></div><h3 style={{ margin: 0, fontSize: 15, fontWeight: 700 }}>Чат временно недоступен</h3><p style={{ margin: "8px 0 0", fontSize: 13, color: "#595959", lineHeight: 1.5, maxWidth: 280 }}>Напишите нам в другом канале — ответим как можно скорее.</p></div>;
+  return <div style={{ display: "flex", flexDirection: "column", alignItems: "center", textAlign: "center", padding: "26px 14px" }}><div style={{ width: 52, height: 52, borderRadius: "50%", background: "#fff7e6", display: "flex", alignItems: "center", justifyContent: "center", marginBottom: 14 }}><svg viewBox="0 0 24 24" width="26" height="26" fill="none" stroke="#d48806" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"><path d="M10.29 3.86 1.82 18a2 2 0 0 0 1.71 3h16.94a2 2 0 0 0 1.71-3L13.71 3.86a2 2 0 0 0-3.42 0Z" /><line x1="12" y1="9" x2="12" y2="13" /><line x1="12" y1="17" x2="12.01" y2="17" /></svg></div><h3 style={{ margin: 0, fontSize: 15, fontWeight: 700 }}>{t("chat.unavailable_title")}</h3><p style={{ margin: "8px 0 0", fontSize: 13, color: "#595959", lineHeight: 1.5, maxWidth: 280 }}>{t("chat.unavailable_body")}</p></div>;
 }
 
 function Consent({ config, accent, letter, title }: { config: WebConfig; accent: string; letter: string; title: string }) {
-  return <><div style={{ display: "flex", flexDirection: "column", alignItems: "center", textAlign: "center", padding: "20px 12px 8px" }}><div style={{ width: 56, height: 56, borderRadius: 16, background: "#e6f4ff", display: "flex", alignItems: "center", justifyContent: "center", marginBottom: 14 }}><span style={{ fontSize: 24, fontWeight: 700, color: accent }}>{letter}</span></div><h3 style={{ margin: 0, fontSize: 17, fontWeight: 700 }}>{title}</h3><p style={{ margin: "8px 0 0", fontSize: 13, color: "#595959", lineHeight: 1.5, maxWidth: 280 }}>{config.greeting}</p></div><div style={{ marginTop: 18, background: "#fff", border: "1px solid #f0f0f0", borderRadius: 12, padding: 14 }}><div style={{ fontSize: 12, color: "#595959", lineHeight: 1.5 }}>{config.consent?.text} · ред. {config.consent?.version}</div></div></>;
+  return <><div style={{ display: "flex", flexDirection: "column", alignItems: "center", textAlign: "center", padding: "20px 12px 8px" }}><div style={{ width: 56, height: 56, borderRadius: 16, background: "#e6f4ff", display: "flex", alignItems: "center", justifyContent: "center", marginBottom: 14 }}><span style={{ fontSize: 24, fontWeight: 700, color: accent }}>{letter}</span></div><h3 style={{ margin: 0, fontSize: 17, fontWeight: 700 }}>{title}</h3><p style={{ margin: "8px 0 0", fontSize: 13, color: "#595959", lineHeight: 1.5, maxWidth: 280 }}>{config.greeting}</p></div><div style={{ marginTop: 18, background: "#fff", border: "1px solid #f0f0f0", borderRadius: 12, padding: 14 }}><div style={{ fontSize: 12, color: "#595959", lineHeight: 1.5 }}>{config.consent?.text} · {t("chat.consent_revision", { version: config.consent?.version ?? "" })}</div></div></>;
 }
 
 export function SystemMessage({ text }: { text: string }) {
@@ -77,7 +78,7 @@ export function SystemMessage({ text }: { text: string }) {
 }
 
 export function StartChatFooter({ accent, starting, onAccept }: { accent: string; starting: boolean; onAccept: () => void }) {
-  return <div style={{ flex: "none", background: "#fff", borderTop: "1px solid #f0f0f0", padding: "12px 14px 14px" }}><button onClick={onAccept} disabled={starting} style={{ width: "100%", height: 44, borderRadius: 10, border: "none", background: accent, color: "#fff", fontSize: 14, fontWeight: 600, cursor: "pointer" }}>{starting ? "Запуск…" : "Принять и начать чат"}</button></div>;
+  return <div style={{ flex: "none", background: "#fff", borderTop: "1px solid #f0f0f0", padding: "12px 14px 14px" }}><button onClick={onAccept} disabled={starting} style={{ width: "100%", height: 44, borderRadius: 10, border: "none", background: accent, color: "#fff", fontSize: 14, fontWeight: 600, cursor: "pointer" }}>{starting ? t("chat.starting") : t("chat.accept_and_start")}</button></div>;
 }
 
 const COMPOSER_MAX_HEIGHT = 132;
@@ -104,11 +105,11 @@ export function ChatComposer({ accent, state, quickReplies, pendingCount, messag
     return (
       <div style={{ flex: "none", background: "#fff", borderTop: "1px solid #f0f0f0", padding: "12px 14px 14px" }}>
         <div style={{ display: "flex", alignItems: "center", gap: 10, border: "1px solid #e8e8e8", borderRadius: 14, padding: "6px 6px 6px 10px", minHeight: 48, boxSizing: "border-box" }}>
-          <button onClick={voice.cancel} disabled={sending} aria-label="Отменить запись" style={{ width: 34, height: 34, borderRadius: 9, border: "none", background: "transparent", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="M3 6h18" /><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6" /><path d="M8 6V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" /></svg></button>
+          <button onClick={voice.cancel} disabled={sending} aria-label={t("chat.cancel_recording")} style={{ width: 34, height: 34, borderRadius: 9, border: "none", background: "transparent", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="M3 6h18" /><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6" /><path d="M8 6V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2" /></svg></button>
           <span style={{ width: 8, height: 8, borderRadius: "50%", background: "#f5222d", flex: "none", animation: "wcTyping 1.2s infinite ease-in-out" }} />
           <span style={{ fontSize: 13.5, fontWeight: 600, color: "#f5222d", fontVariantNumeric: "tabular-nums" }}>{formatSeconds(voice.seconds)}</span>
-          <span style={{ flex: 1, fontSize: 12.5, color: "#8c8c8c" }}>{sending ? "Отправка…" : "Идёт запись"}</span>
-          <button onClick={voice.stopAndSend} disabled={sending} aria-label="Отправить голосовое" style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: accent, display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none", opacity: sending ? 0.6 : 1 }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#fff" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><line x1="22" y1="2" x2="11" y2="13" /><polygon points="22 2 15 22 11 13 2 9 22 2" /></svg></button>
+          <span style={{ flex: 1, fontSize: 12.5, color: "#8c8c8c" }}>{sending ? t("chat.sending") : t("chat.recording")}</span>
+          <button onClick={voice.stopAndSend} disabled={sending} aria-label={t("chat.send_voice")} style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: accent, display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none", opacity: sending ? 0.6 : 1 }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#fff" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><line x1="22" y1="2" x2="11" y2="13" /><polygon points="22 2 15 22 11 13 2 9 22 2" /></svg></button>
         </div>
       </div>
     );
@@ -123,22 +124,22 @@ export function ChatComposer({ accent, state, quickReplies, pendingCount, messag
           <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="m21.44 11.05-9.19 9.19a6 6 0 0 1-8.49-8.49l8.57-8.57A4 4 0 1 1 18 8.84l-8.59 8.57a2 2 0 0 1-2.83-2.83l8.49-8.48" /></svg>
           <span style={{ flex: 1, minWidth: 0, overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap", fontWeight: 600 }}>{attachment.file.name}</span>
           <span style={{ color: "#8c8c8c", fontSize: 11.5, flex: "none" }}>{formatBytes(attachment.file.size)}</span>
-          <button onClick={attachment.clear} aria-label="Убрать файл" style={{ border: "none", background: "transparent", padding: 0, display: "flex", cursor: "pointer", color: "#8c8c8c", flex: "none" }}><svg viewBox="0 0 24 24" width="15" height="15" fill="none" stroke="currentColor" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="10" /><path d="m15 9-6 6M9 9l6 6" /></svg></button>
+          <button onClick={attachment.clear} aria-label={t("chat.remove_file")} style={{ border: "none", background: "transparent", padding: 0, display: "flex", cursor: "pointer", color: "#8c8c8c", flex: "none" }}><svg viewBox="0 0 24 24" width="15" height="15" fill="none" stroke="currentColor" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="10" /><path d="m15 9-6 6M9 9l6 6" /></svg></button>
         </div>
       )}
       {state === "ai" && quickReplies.length > 0 && pendingCount === 0 && messageCount === 0 && <div style={{ display: "flex", gap: 7, flexWrap: "wrap", marginBottom: 10 }}>{quickReplies.map((reply) => <button key={reply} onClick={() => onInput(reply)} style={{ padding: "7px 13px", borderRadius: 16, border: "1px solid #d6e4ff", background: "#f0f7ff", color: "#0958d9", fontSize: 12.5, fontWeight: 500, cursor: "pointer" }}>{reply}</button>)}</div>}
       <div style={{ display: "flex", alignItems: "flex-end", gap: 8, border: "1px solid #e8e8e8", borderRadius: 14, padding: "6px 6px 6px 14px", background: "#fff" }}>
-        <textarea ref={textareaRef} rows={1} value={input} onChange={(event) => onInput(event.target.value)} onKeyDown={(event) => { if (event.key === "Enter" && !event.shiftKey) { event.preventDefault(); onSend(); } }} placeholder={placeholder ?? "Напишите сообщение…"} style={{ flex: 1, border: "none", outline: "none", resize: "none", fontSize: 14, lineHeight: 1.5, color: "#262626", fontFamily: "inherit", padding: "7px 0", maxHeight: COMPOSER_MAX_HEIGHT }} />
+        <textarea ref={textareaRef} rows={1} value={input} onChange={(event) => onInput(event.target.value)} onKeyDown={(event) => { if (event.key === "Enter" && !event.shiftKey) { event.preventDefault(); onSend(); } }} placeholder={placeholder ?? t("chat.message_placeholder")} style={{ flex: 1, border: "none", outline: "none", resize: "none", fontSize: 14, lineHeight: 1.5, color: "#262626", fontFamily: "inherit", padding: "7px 0", maxHeight: COMPOSER_MAX_HEIGHT }} />
         {attachment && (
           <>
-            <button onClick={() => fileInputRef.current?.click()} aria-label="Прикрепить файл" style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: "transparent", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="m21.44 11.05-9.19 9.19a6 6 0 0 1-8.49-8.49l8.57-8.57A4 4 0 1 1 18 8.84l-8.59 8.57a2 2 0 0 1-2.83-2.83l8.49-8.48" /></svg></button>
+            <button onClick={() => fileInputRef.current?.click()} aria-label={t("chat.attach_file")} style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: "transparent", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="m21.44 11.05-9.19 9.19a6 6 0 0 1-8.49-8.49l8.57-8.57A4 4 0 1 1 18 8.84l-8.59 8.57a2 2 0 0 1-2.83-2.83l8.49-8.48" /></svg></button>
             <input ref={fileInputRef} type="file" hidden onChange={(event) => { attachment.pick(event.target.files?.[0] ?? null); event.target.value = ""; }} />
           </>
         )}
         {voice?.supported && !input.trim() && !attachment?.file && (
-          <button onClick={() => void voice.start()} aria-label="Записать голосовое" style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: "transparent", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="M12 2a3 3 0 0 0-3 3v7a3 3 0 0 0 6 0V5a3 3 0 0 0-3-3Z" /><path d="M19 10v2a7 7 0 0 1-14 0v-2" /><line x1="12" y1="19" x2="12" y2="22" /></svg></button>
+          <button onClick={() => void voice.start()} aria-label={t("chat.record_voice")} style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: "transparent", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#8c8c8c" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="M12 2a3 3 0 0 0-3 3v7a3 3 0 0 0 6 0V5a3 3 0 0 0-3-3Z" /><path d="M19 10v2a7 7 0 0 1-14 0v-2" /><line x1="12" y1="19" x2="12" y2="22" /></svg></button>
         )}
-        <button onClick={onSend} aria-label="Отправить" style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: accent, display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#fff" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><line x1="22" y1="2" x2="11" y2="13" /><polygon points="22 2 15 22 11 13 2 9 22 2" /></svg></button>
+        <button onClick={onSend} aria-label={t("chat.send")} style={{ width: 36, height: 36, borderRadius: 10, border: "none", background: accent, display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none" }}><svg viewBox="0 0 24 24" width="17" height="17" fill="none" stroke="#fff" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><line x1="22" y1="2" x2="11" y2="13" /><polygon points="22 2 15 22 11 13 2 9 22 2" /></svg></button>
       </div>
     </div>
   );
@@ -150,8 +151,8 @@ export function CallInviteBanner({ call, accent, onAccept, onDecline }: { call:
   const inviteIcon = isVideo
     ? <svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="#fff" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="M23 7l-7 5 7 5V7z" /><rect x="1" y="5" width="15" height="14" rx="2.5" /></svg>
     : <svg viewBox="0 0 24 24" width="20" height="20" fill="none" stroke="#fff" strokeWidth="1.9" strokeLinecap="round" strokeLinejoin="round"><path d="M22 16.92v3a2 2 0 0 1-2.18 2 19.79 19.79 0 0 1-8.63-3.07 19.5 19.5 0 0 1-6-6 19.79 19.79 0 0 1-3.07-8.67A2 2 0 0 1 4.11 2h3a2 2 0 0 1 2 1.72c.13.81.36 1.6.7 2.34a2 2 0 0 1-.45 2.11L8.09 9.91a16 16 0 0 0 6 6l1.74-1.27a2 2 0 0 1 2.11-.45c.74.34 1.53.57 2.34.7A2 2 0 0 1 22 16.92z" /></svg>;
-  const title = isVideo ? "Входящий видеозвонок" : "Входящий аудиозвонок";
-  return <div style={{ flex: "none", background: "#fff", borderTop: "1px solid #f0f0f0", padding: "12px 14px", display: "flex", alignItems: "center", gap: 12 }}><div style={{ width: 40, height: 40, borderRadius: "50%", background: accent, display: "flex", alignItems: "center", justifyContent: "center", flex: "none" }}>{inviteIcon}</div><div style={{ flex: 1, minWidth: 0 }}><div style={{ fontSize: 13.5, fontWeight: 600, color: "#1f1f1f" }}>{title}</div><div style={{ fontSize: 12, color: "#8c8c8c", marginTop: 2, whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis" }}>{call.staffName || "Оператор"} приглашает вас на онлайн-звонок</div></div><button onClick={onDecline} aria-label="Отклонить" style={{ width: 42, height: 42, borderRadius: "50%", border: "none", background: "#ff4d4f", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none", boxShadow: "0 2px 8px rgba(255,77,79,.35)" }}>{phoneIcon(true)}</button><button onClick={onAccept} aria-label="Принять" style={{ width: 42, height: 42, borderRadius: "50%", border: "none", background: "#52c41a", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none", boxShadow: "0 2px 8px rgba(82,196,26,.35)" }}>{phoneIcon(false)}</button></div>;
+  const title = isVideo ? t("chat.incoming_video_call") : t("chat.incoming_audio_call");
+  return <div style={{ flex: "none", background: "#fff", borderTop: "1px solid #f0f0f0", padding: "12px 14px", display: "flex", alignItems: "center", gap: 12 }}><div style={{ width: 40, height: 40, borderRadius: "50%", background: accent, display: "flex", alignItems: "center", justifyContent: "center", flex: "none" }}>{inviteIcon}</div><div style={{ flex: 1, minWidth: 0 }}><div style={{ fontSize: 13.5, fontWeight: 600, color: "#1f1f1f" }}>{title}</div><div style={{ fontSize: 12, color: "#8c8c8c", marginTop: 2, whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis" }}>{t("chat.invites_you_to_call", { name: call.staffName || t("call.operator") })}</div></div><button onClick={onDecline} aria-label={t("call.decline")} style={{ width: 42, height: 42, borderRadius: "50%", border: "none", background: "#ff4d4f", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none", boxShadow: "0 2px 8px rgba(255,77,79,.35)" }}>{phoneIcon(true)}</button><button onClick={onAccept} aria-label={t("call.accept")} style={{ width: 42, height: 42, borderRadius: "50%", border: "none", background: "#52c41a", display: "flex", alignItems: "center", justifyContent: "center", cursor: "pointer", flex: "none", boxShadow: "0 2px 8px rgba(82,196,26,.35)" }}>{phoneIcon(false)}</button></div>;
 }
 
 function formatTime(iso: string | undefined): string {
@@ -163,9 +164,10 @@ function formatTime(iso: string | undefined): string {
 const META: React.CSSProperties = { fontSize: 11, color: "#bfbfbf", marginTop: 4 };
 
 export function formatBytes(bytes: number): string {
-  if (bytes < 1024) return `${bytes} Б`;
-  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(0)} КБ`;
-  return `${(bytes / (1024 * 1024)).toFixed(1)} МБ`;
+  // Байты — только у совсем маленьких файлов: «1 КБ» ниже килобайта врало бы.
+  if (bytes < 1024) return t("unit.b", { value: bytes });
+  const { value, unit } = fmt.bytes(bytes);
+  return t(unit === "mb" ? "unit.mb" : "unit.kb", { value });
 }
 
 export type BubbleAttachment = { name: string; contentType: string; size: number; available: boolean; url: string; inlineUrl: string };
@@ -192,7 +194,7 @@ function AttachmentContent({ attachment, text, light }: { attachment: BubbleAtta
               <span style={{ fontSize: 13, fontWeight: 600, color, overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}>{attachment.name}</span>
               <span style={{ fontSize: 11.5, color: muted }}>{attachment.size ? formatBytes(attachment.size) : ""}</span>
             </span>
-            {attachment.url ? <a href={attachment.url} download={attachment.name} style={{ fontSize: 12.5, fontWeight: 600, color: light ? "#fff" : "#1677ff", textDecoration: "none", flex: "none" }}>Скачать</a> : <span style={{ fontSize: 12, color: muted }}>недоступен</span>}
+            {attachment.url ? <a href={attachment.url} download={attachment.name} style={{ fontSize: 12.5, fontWeight: 600, color: light ? "#fff" : "#1677ff", textDecoration: "none", flex: "none" }}>{t("chat.download")}</a> : <span style={{ fontSize: 12, color: muted }}>{t("chat.file_unavailable")}</span>}
           </div>
         )}
       {text && <div style={{ marginTop: 6 }}>{text}</div>}
@@ -207,9 +209,9 @@ export function Bubble({ author, text, accent, time, pendingState, audioUrl, att
     : attachment
       ? <AttachmentContent attachment={attachment} text={text} light={author === "client"} />
       : text;
-  if (author === "client") return <div style={{ display: "flex", justifyContent: "flex-end", marginBottom: 12 }}><div style={{ maxWidth: "82%" }}><div style={{ background: accent, color: "#fff", borderRadius: "16px 16px 4px 16px", padding: audioUrl ? "8px" : "10px 14px", fontSize: 14.5, lineHeight: 1.5, whiteSpace: "pre-wrap", wordBreak: "break-word" }}>{content}</div><div style={{ ...META, marginRight: 4, textAlign: "right" }}>{pendingState ? "отправка…" : [at, "доставлено"].filter(Boolean).join(" · ")}</div></div></div>;
+  if (author === "client") return <div style={{ display: "flex", justifyContent: "flex-end", marginBottom: 12 }}><div style={{ maxWidth: "82%" }}><div style={{ background: accent, color: "#fff", borderRadius: "16px 16px 4px 16px", padding: audioUrl ? "8px" : "10px 14px", fontSize: 14.5, lineHeight: 1.5, whiteSpace: "pre-wrap", wordBreak: "break-word" }}>{content}</div><div style={{ ...META, marginRight: 4, textAlign: "right" }}>{pendingState ? t("chat.sending_lower") : [at, t("chat.delivered")].filter(Boolean).join(" · ")}</div></div></div>;
   const isOperator = author === "operator";
-  return <div style={{ display: "flex", gap: 9, marginBottom: 12 }}><div style={{ width: 30, height: 30, borderRadius: "50%", background: isOperator ? accent : "#eef0f2", border: isOperator ? "none" : "1px solid #e3e6ea", color: "#fff", display: "flex", alignItems: "center", justifyContent: "center", flex: "none" }}>{isOperator ? <span style={{ fontSize: 11.5, fontWeight: 600 }}>О</span> : <svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="#8c8c8c" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="8" r="3.2" /><path d="M5.5 20a6.5 6.5 0 0 1 13 0" /></svg>}</div><div style={{ maxWidth: "82%" }}><div style={{ background: "#fff", border: "1px solid #eee", borderRadius: "16px 16px 16px 4px", padding: audioUrl ? "8px" : "10px 14px", fontSize: 14.5, lineHeight: 1.5, color: "#262626", whiteSpace: "pre-wrap", wordBreak: "break-word" }}>{content}</div><div style={{ ...META, marginLeft: 4 }}>{[isOperator ? "Специалист" : "Виртуальный помощник", at].filter(Boolean).join(" · ")}</div></div></div>;
+  return <div style={{ display: "flex", gap: 9, marginBottom: 12 }}><div style={{ width: 30, height: 30, borderRadius: "50%", background: isOperator ? accent : "#eef0f2", border: isOperator ? "none" : "1px solid #e3e6ea", color: "#fff", display: "flex", alignItems: "center", justifyContent: "center", flex: "none" }}>{isOperator ? <span style={{ fontSize: 11.5, fontWeight: 600 }}>{t("chat.operator_initial")}</span> : <svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="#8c8c8c" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="8" r="3.2" /><path d="M5.5 20a6.5 6.5 0 0 1 13 0" /></svg>}</div><div style={{ maxWidth: "82%" }}><div style={{ background: "#fff", border: "1px solid #eee", borderRadius: "16px 16px 16px 4px", padding: audioUrl ? "8px" : "10px 14px", fontSize: 14.5, lineHeight: 1.5, color: "#262626", whiteSpace: "pre-wrap", wordBreak: "break-word" }}>{content}</div><div style={{ ...META, marginLeft: 4 }}>{[isOperator ? t("chat.specialist") : t("chat.virtual_assistant"), at].filter(Boolean).join(" · ")}</div></div></div>;
 }
 
 function formatPhone(raw: string): string {
@@ -233,7 +235,7 @@ function PhoneForm({ accent, onSubmit }: { accent: string; onSubmit: (phone: str
   const [error, setError] = useState(false);
   const valid = phone.replace(/\D/g, "").length === 11;
   async function submit() { if (!valid || sending) return; setSending(true); setError(false); const ok = await onSubmit(phone); setSending(false); if (!ok) setError(true); }
-  return <div style={{ margin: "2px 0 10px 36px", maxWidth: "78%", background: "#fff", border: "1px solid #eee", borderRadius: 12, padding: 12 }}><input type="tel" inputMode="tel" value={phone} onChange={(event) => setPhone(formatPhone(event.target.value))} onKeyDown={(event) => { if (event.key === "Enter") { event.preventDefault(); void submit(); } }} placeholder="+7 (___) ___-__-__" style={{ width: "100%", boxSizing: "border-box", height: 38, borderRadius: 8, border: error ? "1px solid #ff4d4f" : "1px solid #d9d9d9", padding: "0 10px", outline: "none", fontSize: 13.5 }} /><button type="button" onClick={() => void submit()} disabled={!valid || sending} style={{ width: "100%", height: 36, marginTop: 8, borderRadius: 8, border: "none", background: valid ? accent : "#d9d9d9", color: "#fff", fontSize: 12.5, fontWeight: 600, cursor: valid ? "pointer" : "default" }}>{sending ? "Отправка…" : "Поделиться номером"}</button>{error && <div style={{ marginTop: 6, color: "#cf1322", fontSize: 11.5 }}>Не удалось отправить. Попробуйте ещё раз.</div>}</div>;
+  return <div style={{ margin: "2px 0 10px 36px", maxWidth: "78%", background: "#fff", border: "1px solid #eee", borderRadius: 12, padding: 12 }}><input type="tel" inputMode="tel" value={phone} onChange={(event) => setPhone(formatPhone(event.target.value))} onKeyDown={(event) => { if (event.key === "Enter") { event.preventDefault(); void submit(); } }} placeholder="+7 (___) ___-__-__" style={{ width: "100%", boxSizing: "border-box", height: 38, borderRadius: 8, border: error ? "1px solid #ff4d4f" : "1px solid #d9d9d9", padding: "0 10px", outline: "none", fontSize: 13.5 }} /><button type="button" onClick={() => void submit()} disabled={!valid || sending} style={{ width: "100%", height: 36, marginTop: 8, borderRadius: 8, border: "none", background: valid ? accent : "#d9d9d9", color: "#fff", fontSize: 12.5, fontWeight: 600, cursor: valid ? "pointer" : "default" }}>{sending ? t("chat.sending") : t("chat.share_number")}</button>{error && <div style={{ marginTop: 6, color: "#cf1322", fontSize: 11.5 }}>{t("chat.share_number_failed")}</div>}</div>;
 }
 
 export function Typing() {
diff --git a/apps/web-chat/src/api.ts b/apps/web-chat/src/api.ts
index c940ce9..d47fd33 100644
--- a/apps/web-chat/src/api.ts
+++ b/apps/web-chat/src/api.ts
@@ -1,8 +1,13 @@
+import { t } from "./i18n";
+
 const API = "/api/v1/webchat";
 
 export type WidgetFeatures = { voiceMessages: boolean; audioCalls: boolean; videoCalls: boolean };
 
 export type WebConfig = {
+  // Язык обвязки виджета: язык организации, на котором отвечают агент и
+  // оператор. Пусто — язык решает браузер посетителя.
+  language?: string;
   features?: WidgetFeatures;
   available: boolean;
   reason?: string;
@@ -166,8 +171,8 @@ async function callAccessAction(action: "accept" | "decline" | "end", accessToke
     headers: { "Content-Type": "application/json", Authorization: `Bearer ${accessToken}` },
   });
   if (!r.ok) {
-    const payload = await r.json().catch(() => ({ detail: "Не удалось выполнить действие со звонком" })) as { detail?: string };
-    throw new Error(payload.detail || "Не удалось выполнить действие со звонком");
+    const payload = await r.json().catch(() => ({ detail: t("call.could_not_act_on_call") })) as { detail?: string };
+    throw new Error(payload.detail || t("call.could_not_act_on_call"));
   }
   return (await r.json()).call as CallInfo;
 }
diff --git a/apps/web-chat/src/call/AudioCallStage.tsx b/apps/web-chat/src/call/AudioCallStage.tsx
index 6ebf893..b64c210 100644
--- a/apps/web-chat/src/call/AudioCallStage.tsx
+++ b/apps/web-chat/src/call/AudioCallStage.tsx
@@ -8,6 +8,7 @@ import { useCallback, useEffect, useMemo, useState } from "react";
 import { acceptCall, declineCall, endCall, fetchCallState, type CallInfo } from "../api";
 import { audioCallStatusLabel, buildAudioCallViewStatus, isTerminalCall, resolveAudioCallViewMode } from "./model";
 import { useConnectionTimer } from "./useConnectionTimer";
+import { t } from "../i18n";
 
 type Props = {
   call: CallInfo | null;
@@ -69,7 +70,7 @@ export function AudioCallStage({ call, accessToken, iceServers, loading, invalid
       setStarted(true);
       await rtc.start();
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось принять звонок");
+      setErrorText(error instanceof Error ? error.message : t("call.could_not_accept"));
     } finally {
       setJoining(false);
     }
@@ -85,7 +86,7 @@ export function AudioCallStage({ call, accessToken, iceServers, loading, invalid
       onCall(ended);
       rtc.stop();
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось завершить звонок");
+      setErrorText(error instanceof Error ? error.message : t("call.could_not_end"));
     }
   }, [accessToken, call?.status, onCall, rtc.stop]);
 
@@ -94,7 +95,7 @@ export function AudioCallStage({ call, accessToken, iceServers, loading, invalid
     try {
       onCall(await endCall(accessToken));
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось завершить звонок");
+      setErrorText(error instanceof Error ? error.message : t("call.could_not_end"));
     } finally {
       rtc.stop();
     }
@@ -116,8 +117,8 @@ export function AudioCallStage({ call, accessToken, iceServers, loading, invalid
   }, [rtc.mediaIssue, rtc.prepare, rtc.restart]);
 
   const elapsed = useConnectionTimer(rtc.connectionPhase === "connected");
-  const peerName = call?.staffName || "Оператор";
-  const initials = peerName.trim().split(/\s+/).map((part) => part[0]).slice(0, 2).join("").toUpperCase() || "ОП";
+  const peerName = call?.staffName || t("call.operator");
+  const initials = peerName.trim().split(/\s+/).map((part) => part[0]).slice(0, 2).join("").toUpperCase() || t("call.operator_initials");
 
   return (
     <main className="public-call-page is-audio">
@@ -134,7 +135,7 @@ export function AudioCallStage({ call, accessToken, iceServers, loading, invalid
         durationSeconds={call?.durationSeconds ?? null}
         mediaIssue={rtc.mediaIssue}
         statusLabel={audioCallStatusLabel(mode, status)}
-        subCaption={mode === "active" ? (rtc.micOn ? "Говорите" : "Ваш микрофон выключен") : undefined}
+        subCaption={mode === "active" ? (rtc.micOn ? t("call.speak") : t("call.mic_off")) : undefined}
         onToggleMic={rtc.toggleMic}
         onToggleSpeaker={() => setSpeakerOn((current) => !current)}
         onAccept={() => void join()}
diff --git a/apps/web-chat/src/call/VideoCallStage.tsx b/apps/web-chat/src/call/VideoCallStage.tsx
index 3ebf1dd..9b18061 100644
--- a/apps/web-chat/src/call/VideoCallStage.tsx
+++ b/apps/web-chat/src/call/VideoCallStage.tsx
@@ -8,6 +8,7 @@ import { useCallback, useEffect, useMemo, useState } from "react";
 import { acceptCall, declineCall, endCall, fetchCallState, type CallInfo } from "../api";
 import { buildCallViewStatus, callViewSubtitle, isTerminalCall, resolveCallViewMode } from "./model";
 import { useConnectionTimer } from "./useConnectionTimer";
+import { t } from "../i18n";
 
 type Props = {
   call: CallInfo | null;
@@ -66,7 +67,7 @@ export function VideoCallStage({ call, accessToken, iceServers, loading, invalid
       setStarted(true);
       await rtc.start();
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось принять звонок");
+      setErrorText(error instanceof Error ? error.message : t("call.could_not_accept"));
     } finally {
       setJoining(false);
     }
@@ -82,14 +83,14 @@ export function VideoCallStage({ call, accessToken, iceServers, loading, invalid
       onCall(ended);
       rtc.stop();
     } catch (error) {
-      setErrorText(error instanceof Error ? error.message : "Не удалось завершить звонок");
+      setErrorText(error instanceof Error ? error.message : t("call.could_not_end"));
     }
   }
 
   async function end() {
     if (!accessToken) return;
     try { onCall(await endCall(accessToken)); }
-    catch (error) { setErrorText(error instanceof Error ? error.message : "Не удалось завершить звонок"); }
+    catch (error) { setErrorText(error instanceof Error ? error.message : t("call.could_not_end")); }
     finally { rtc.stop(); }
   }
 
@@ -100,9 +101,9 @@ export function VideoCallStage({ call, accessToken, iceServers, loading, invalid
     [loading, invalid, call, joining, rtc.connectionPhase, rtc.mediaIssue, errorText, close, rtc.restart, rtc.prepare],
   );
   const elapsed = useConnectionTimer(rtc.connectionPhase === "connected");
-  const peerName = call?.staffName || "Оператор";
-  const initials = peerName.trim().split(/\s+/).map((part) => part[0]).slice(0, 2).join("").toUpperCase() || "ОП";
-  const mediaCaption = rtc.mediaIssue === "devices" ? "Нет доступа к камере и микрофону" : rtc.mediaIssue === "video" ? "Камера недоступна" : "Камера выключена";
+  const peerName = call?.staffName || t("call.operator");
+  const initials = peerName.trim().split(/\s+/).map((part) => part[0]).slice(0, 2).join("").toUpperCase() || t("call.operator_initials");
+  const mediaCaption = rtc.mediaIssue === "devices" ? t("call.no_camera_mic_access") : rtc.mediaIssue === "video" ? t("call.camera_unavailable") : t("call.camera_off");
 
   return (
     <main className="public-call-page">
@@ -121,7 +122,7 @@ export function VideoCallStage({ call, accessToken, iceServers, loading, invalid
         elapsedSeconds={elapsed}
         status={status}
         joining={joining || rtc.preparing}
-        cancelLabel="Отклонить"
+        cancelLabel={t("call.decline")}
         onToggleMic={rtc.toggleMic}
         onToggleCam={rtc.toggleCam}
         onJoin={() => void join()}
diff --git a/apps/web-chat/src/call/model.ts b/apps/web-chat/src/call/model.ts
index 4adcbbc..2dcae82 100644
--- a/apps/web-chat/src/call/model.ts
+++ b/apps/web-chat/src/call/model.ts
@@ -1,15 +1,20 @@
 import { type AudioBarKind, type AudioCallMode, type AudioCallStatus, type CallViewMode, type CallViewStatus, buildAudioStatus, isTerminalCallStatus } from "@chatballs/ui";
 
 import type { CallInfo } from "../api";
+import { t } from "../i18n";
 
-const TERMINAL: Record<string, { icon: CallViewStatus["icon"]; tone: "neutral" | "error" | "warn"; title: string; caption: string }> = {
-  DECLINED: { icon: "declined", tone: "neutral", title: "Звонок отклонён", caption: "Вы отклонили вызов. Продолжить общение можно в чате." },
-  CANCELLED: { icon: "declined", tone: "neutral", title: "Звонок отменён", caption: "Сотрудник отменил приглашение. Продолжить общение можно в чате." },
-  MISSED: { icon: "missed", tone: "warn", title: "Пропущенный звонок", caption: "Никто не ответил вовремя. Запросите новое приглашение в чате." },
-  EXPIRED: { icon: "clock", tone: "warn", title: "Время ожидания истекло", caption: "Приглашение истекло. Запросите новое приглашение в чате." },
-  ENDED: { icon: "declined", tone: "neutral", title: "Звонок завершён", caption: "Спасибо! Продолжить общение можно в чате." },
-  FAILED: { icon: "alert", tone: "error", title: "Не удалось соединиться", caption: "Проверьте интернет-соединение и попробуйте снова по ссылке из чата." },
-};
+// Функция, а не константа: текст зависит от языка, а язык виджета приходит с
+// настройками — то есть после того, как модуль уже импортирован.
+function terminalStatuses(): Record<string, { icon: CallViewStatus["icon"]; tone: "neutral" | "error" | "warn"; title: string; caption: string }> {
+  return {
+    DECLINED: { icon: "declined", tone: "neutral", title: t("call.declined"), caption: t("call.declined_by_you") },
+    CANCELLED: { icon: "declined", tone: "neutral", title: t("call.cancelled"), caption: t("call.cancelled_by_staff") },
+    MISSED: { icon: "missed", tone: "warn", title: t("call.missed"), caption: t("call.nobody_answered_ask_again") },
+    EXPIRED: { icon: "clock", tone: "warn", title: t("call.wait_timed_out"), caption: t("call.expired_ask_again") },
+    ENDED: { icon: "declined", tone: "neutral", title: t("call.ended"), caption: t("call.thanks_continue_in_chat") },
+    FAILED: { icon: "alert", tone: "error", title: t("call.could_not_connect"), caption: t("call.check_connection_link") },
+  };
+}
 
 export const isTerminalCall = isTerminalCallStatus;
 
@@ -22,25 +27,25 @@ export function resolveCallViewMode(state: { loading: boolean; invalid: boolean;
 }
 
 export function buildCallViewStatus(state: { loading: boolean; invalid: boolean; call: CallInfo | null; connection: string; mediaIssue: string; errorText?: string; close: () => void; retry: () => void; prepare: () => void; join: () => void }): CallViewStatus | undefined {
-  if (state.loading) return { icon: "spinner", tone: "neutral", title: "Проверяем приглашение", caption: "Секунду…" };
-  if (state.invalid || !state.call) return { icon: "clock", tone: "warn", title: "Приглашение недействительно", caption: "Ссылка устарела или уже была использована. Запросите новое приглашение в чате." };
-  if (state.errorText) return { icon: "alert", tone: "error", title: "Не удалось выполнить действие", caption: state.errorText, actions: [{ label: "Закрыть", kind: "secondary", onClick: state.close }] };
-  if (state.mediaIssue === "unsupported") return { icon: "unsupported", tone: "error", title: "Видеозвонки не поддерживаются", caption: "Обновите браузер или откройте ссылку в Chrome, Safari или Edge." };
-  if (state.mediaIssue === "devices") return { icon: "alert", tone: "error", title: "Нет доступа к камере и микрофону", caption: "Разрешите доступ к устройствам в настройках браузера и повторите.", actions: [{ label: "Повторить проверку", kind: "primary", onClick: state.prepare }, { label: "Без видео", kind: "secondary", onClick: state.join }] };
-  if (state.connection === "failed") return { icon: "alert", tone: "error", title: "Не удалось соединиться", caption: "Проверьте интернет-соединение и попробуйте снова.", actions: [{ label: "Повторить", kind: "primary", onClick: state.retry }] };
-  const terminal = TERMINAL[state.call.status];
+  if (state.loading) return { icon: "spinner", tone: "neutral", title: t("call.checking_invite"), caption: t("call.one_moment") };
+  if (state.invalid || !state.call) return { icon: "clock", tone: "warn", title: t("call.invite_invalid"), caption: t("call.invite_stale") };
+  if (state.errorText) return { icon: "alert", tone: "error", title: t("call.could_not_act"), caption: state.errorText, actions: [{ label: t("call.close"), kind: "secondary", onClick: state.close }] };
+  if (state.mediaIssue === "unsupported") return { icon: "unsupported", tone: "error", title: t("call.video_not_supported"), caption: t("call.update_browser") };
+  if (state.mediaIssue === "devices") return { icon: "alert", tone: "error", title: t("call.no_camera_mic_access"), caption: t("call.allow_devices"), actions: [{ label: t("call.retry_check"), kind: "primary", onClick: state.prepare }, { label: t("call.without_video"), kind: "secondary", onClick: state.join }] };
+  if (state.connection === "failed") return { icon: "alert", tone: "error", title: t("call.could_not_connect"), caption: t("call.check_connection"), actions: [{ label: t("call.retry"), kind: "primary", onClick: state.retry }] };
+  const terminal = terminalStatuses()[state.call.status];
   if (terminal) {
-    const duration = state.call.status === "ENDED" && state.call.durationSeconds != null ? `Длительность ${formatDuration(state.call.durationSeconds)}. ` : "";
-    return { ...terminal, caption: duration + terminal.caption, actions: [{ label: "Закрыть", kind: "secondary", onClick: state.close }] };
+    const duration = state.call.status === "ENDED" && state.call.durationSeconds != null ? `${t("call.duration", { duration: formatDuration(state.call.durationSeconds) })} ` : "";
+    return { ...terminal, caption: duration + terminal.caption, actions: [{ label: t("call.close"), kind: "secondary", onClick: state.close }] };
   }
-  return { icon: "spinner", tone: "neutral", title: "Соединяем звонок", caption: "Устанавливаем защищённое соединение…" };
+  return { icon: "spinner", tone: "neutral", title: t("call.connecting"), caption: t("call.establishing") };
 }
 
 export function callViewSubtitle(mode: CallViewMode, status?: CallViewStatus) {
-  if (mode === "precall") return "Проверьте камеру и микрофон";
-  if (mode === "active") return "Активный звонок";
-  if (mode === "reconnecting") return "Переподключение";
-  return status?.title ?? "Соединение";
+  if (mode === "precall") return t("call.check_camera_mic");
+  if (mode === "active") return t("call.active");
+  if (mode === "reconnecting") return t("call.reconnecting");
+  return status?.title ?? t("call.connection");
 }
 
 // --- Аудиозвонок (baseline «Аудиозвонок.dc.html»): incoming → active → терминал,
@@ -69,24 +74,24 @@ function clientStatus(status: AudioCallStatus | null): AudioCallStatus | undefin
 }
 
 export function buildAudioCallViewStatus(state: { loading: boolean; invalid: boolean; call: CallInfo | null; connection: string; mediaIssue: string; errorText?: string; close: () => void }): AudioCallStatus | undefined {
-  if (state.loading) return { icon: "clock", tone: "warn", title: "Проверяем приглашение", caption: "Секунду…", bar: "close" };
-  if (state.invalid || !state.call) return { icon: "clock", tone: "warn", title: "Приглашение недействительно", caption: "Ссылка устарела или уже была использована. Запросите новое приглашение в чате.", bar: "close" };
-  if (state.errorText) return { icon: "alert", tone: "error", title: "Не удалось выполнить действие", caption: state.errorText, bar: "retryClose" };
-  if (state.mediaIssue === "unsupported") return clientStatus(buildAudioStatus("unsupported", state.call.staffName || "Оператор"));
-  if (state.mediaIssue === "devices") return clientStatus(buildAudioStatus("nodevice", state.call.staffName || "Оператор"));
-  if (state.connection === "failed") return clientStatus(buildAudioStatus("FAILED", state.call.staffName || "Оператор"));
+  if (state.loading) return { icon: "clock", tone: "warn", title: t("call.checking_invite"), caption: t("call.one_moment"), bar: "close" };
+  if (state.invalid || !state.call) return { icon: "clock", tone: "warn", title: t("call.invite_invalid"), caption: t("call.invite_stale"), bar: "close" };
+  if (state.errorText) return { icon: "alert", tone: "error", title: t("call.could_not_act"), caption: state.errorText, bar: "retryClose" };
+  if (state.mediaIssue === "unsupported") return clientStatus(buildAudioStatus("unsupported", state.call.staffName || t("call.operator")));
+  if (state.mediaIssue === "devices") return clientStatus(buildAudioStatus("nodevice", state.call.staffName || t("call.operator")));
+  if (state.connection === "failed") return clientStatus(buildAudioStatus("FAILED", state.call.staffName || t("call.operator")));
   const key = state.call.status === "ACCEPTED" || state.call.status === "CONNECTING" ? "connecting" : state.call.status;
-  return clientStatus(buildAudioStatus(key, state.call.staffName || "Оператор", state.call.durationSeconds ?? undefined));
+  return clientStatus(buildAudioStatus(key, state.call.staffName || t("call.operator"), state.call.durationSeconds ?? undefined));
 }
 
 export function audioCallStatusLabel(mode: AudioCallMode, status?: AudioCallStatus): string {
   if (status) return status.title;
-  if (mode === "incoming") return "Входящий звонок";
-  if (mode === "ringing") return "Соединение";
-  if (mode === "active") return "Аудиозвонок";
-  if (mode === "connecting") return "Соединение";
-  if (mode === "reconnecting") return "Переподключение";
-  return "Звонок завершён";
+  if (mode === "incoming") return t("call.incoming");
+  if (mode === "ringing") return t("call.connection");
+  if (mode === "active") return t("call.audio_call");
+  if (mode === "connecting") return t("call.connection");
+  if (mode === "reconnecting") return t("call.reconnecting");
+  return t("call.ended");
 }
 
 function formatDuration(seconds: number) {
diff --git a/apps/web-chat/src/i18n/en.ts b/apps/web-chat/src/i18n/en.ts
new file mode 100644
index 0000000..c29dcfe
--- /dev/null
+++ b/apps/web-chat/src/i18n/en.ts
@@ -0,0 +1,98 @@
+// English catalogue for the widget. Mirrors ru.ts key for key.
+
+import type { Message } from "@chatballs/shared";
+
+import type { ChatMessageKey } from "./ru";
+
+export const en: Record<ChatMessageKey, Message> = {
+  "chat.accept_and_start": "Accept and start the chat",
+  "chat.attach_file": "Attach a file",
+  "chat.cancel_recording": "Cancel the recording",
+  "chat.chat": "Chat",
+  "chat.collapse": "Collapse",
+  "chat.today": "Today",
+  "chat.consent_revision": "rev. {version}",
+  "chat.invites_you_to_call": "{name} is inviting you to an online call",
+  "chat.download": "Download",
+  "chat.delivered": "delivered",
+  "chat.file_too_big": "The file is over 20 MB",
+  "chat.file_unavailable": "unavailable",
+  "chat.incoming_audio_call": "Incoming audio call",
+  "chat.incoming_video_call": "Incoming video call",
+  "chat.loading": "Loading…",
+  "chat.message_placeholder": "Write a message…",
+  "chat.operator_answering": "A specialist is answering",
+  "chat.passing_to_operator": "Passing to an operator",
+  "chat.record_voice": "Record a voice message",
+  "chat.recording": "Recording",
+  "chat.remove_file": "Remove the file",
+  "chat.send": "Send",
+  "chat.send_voice": "Send the voice message",
+  "chat.sending": "Sending…",
+  "chat.sending_lower": "sending…",
+  "chat.specialist": "Specialist",
+  "chat.share_number": "Share my number",
+  "chat.share_number_failed": "Could not send it. Try again.",
+  "chat.starting": "Starting…",
+  "chat.temporarily_unavailable": "Temporarily unavailable",
+  "chat.unavailable_body": "Write to us on another channel — we will answer as soon as we can.",
+  "chat.unavailable_title": "The chat is temporarily unavailable",
+  "chat.virtual_assistant": "Virtual assistant",
+  "chat.voice_message": "Voice message",
+  "chat.operator_initial": "O",
+
+  "call.accept": "Accept",
+  "call.active": "Active call",
+  "call.camera_off": "The camera is off",
+  "call.camera_unavailable": "The camera is unavailable",
+  "call.cancelled_by_staff": "The operator cancelled the invitation. You can carry on in the chat.",
+  "call.check_camera_mic": "Check the camera and microphone",
+  "call.check_connection_link": "Check your internet connection and try the link from the chat again.",
+  "call.checking_invite": "Checking the invitation",
+  "call.close": "Close",
+  "call.connecting": "Connecting the call",
+  "call.connection": "Connecting",
+  "call.could_not_accept": "Could not accept the call",
+  "call.could_not_act": "Could not complete the action",
+  "call.could_not_act_on_call": "Could not complete the call action",
+  "call.could_not_connect": "Could not connect",
+  "call.could_not_end": "Could not end the call",
+  "call.decline": "Decline",
+  "call.declined_by_you": "You declined the call. You can carry on in the chat.",
+  "call.duration": "Duration {duration}.",
+  "call.ended": "Call ended",
+  "call.establishing": "Establishing a secure connection…",
+  "call.expired_ask_again": "The invitation expired. Ask for a new one in the chat.",
+  "call.incoming": "Incoming call",
+  "call.audio_call": "Audio call",
+  "call.invite_invalid": "The invitation is not valid",
+  "call.invite_stale": "The link is stale or has already been used. Ask for a new invitation in the chat.",
+  "call.mic_off": "Your microphone is off",
+  "call.missed": "Missed call",
+  "call.no_camera_mic_access": "No access to the camera and microphone",
+  "call.nobody_answered_ask_again": "Nobody answered in time. Ask for a new invitation in the chat.",
+  "call.one_moment": "One moment…",
+  "call.operator": "Operator",
+  "call.operator_initials": "OP",
+  "call.reconnecting": "Reconnecting",
+  "call.speak": "Go ahead",
+  "call.thanks_continue_in_chat": "Thank you! You can carry on in the chat.",
+  "call.video_not_supported": "Video calls are not supported",
+  "call.wait_timed_out": "The wait timed out",
+  "call.update_browser": "Update your browser or open the link in Chrome, Safari or Edge.",
+  "call.allow_devices": "Allow device access in the browser settings and try again.",
+  "call.retry_check": "Check again",
+  "call.without_video": "Without video",
+  "call.check_connection": "Check your internet connection and try again.",
+  "call.retry": "Try again",
+  "call.cancelled": "Call cancelled",
+  "call.declined": "Call declined",
+
+  "chat.could_not_send_voice": "Could not send the voice message",
+  "chat.could_not_send_file": "Could not send the file",
+  "chat.no_mic_access": "No access to the microphone",
+
+  "unit.b": "{value} B",
+  "unit.kb": "{value} KB",
+  "unit.mb": "{value} MB",
+};
diff --git a/apps/web-chat/src/i18n/index.ts b/apps/web-chat/src/i18n/index.ts
new file mode 100644
index 0000000..40c4bb4
--- /dev/null
+++ b/apps/web-chat/src/i18n/index.ts
@@ -0,0 +1,24 @@
+// Язык виджета.
+//
+// Виджет открывается у клиента на чужой странице, и профиля здесь нет. Язык
+// приходит вместе с настройками виджета — это язык организации, на котором
+// отвечают и агент, и оператор; английская обвязка вокруг русских ответов
+// читалась бы как поломка. Пока настройки не загрузились (а это первый кадр),
+// работает язык браузера посетителя.
+
+import { createI18n, resolveLanguage, setCurrentLanguage } from "@chatballs/shared";
+
+import { en } from "./en";
+import { ru, type ChatMessageKey } from "./ru";
+
+const i18n = createI18n<ChatMessageKey>({ catalogs: { ru, en }, source: "ru" });
+i18n.setLanguage(resolveLanguage({}));
+
+export type { ChatMessageKey };
+export const t = i18n.t;
+export const fmt = i18n.fmt;
+
+/** Принять язык из настроек виджета. Пустое значение оставляет язык браузера. */
+export function applyWidgetLanguage(language: string | undefined): void {
+  if (language) setCurrentLanguage(language);
+}
diff --git a/apps/web-chat/src/i18n/ru.ts b/apps/web-chat/src/i18n/ru.ts
new file mode 100644
index 0000000..69ded7f
--- /dev/null
+++ b/apps/web-chat/src/i18n/ru.ts
@@ -0,0 +1,101 @@
+// Словарь виджета. Русский — оригинал, английский обязан повторить его ключи.
+//
+// У виджета свой словарь, отдельный от рабочего места: он грузится в чужую
+// страницу, и тащить туда полторы тысячи строк оператора незачем.
+
+import type { Message } from "@chatballs/shared";
+
+export const ru = {
+  "chat.accept_and_start": "Принять и начать чат",
+  "chat.attach_file": "Прикрепить файл",
+  "chat.cancel_recording": "Отменить запись",
+  "chat.chat": "Чат",
+  "chat.collapse": "Свернуть",
+  "chat.today": "Сегодня",
+  "chat.consent_revision": "ред. {version}",
+  "chat.invites_you_to_call": "{name} приглашает вас на онлайн-звонок",
+  "chat.download": "Скачать",
+  "chat.delivered": "доставлено",
+  "chat.file_too_big": "Файл больше 20 МБ",
+  "chat.file_unavailable": "недоступен",
+  "chat.incoming_audio_call": "Входящий аудиозвонок",
+  "chat.incoming_video_call": "Входящий видеозвонок",
+  "chat.loading": "Загрузка…",
+  "chat.message_placeholder": "Напишите сообщение…",
+  "chat.operator_answering": "Отвечает специалист",
+  "chat.passing_to_operator": "Передаём оператору",
+  "chat.record_voice": "Записать голосовое",
+  "chat.recording": "Идёт запись",
+  "chat.remove_file": "Убрать файл",
+  "chat.send": "Отправить",
+  "chat.send_voice": "Отправить голосовое",
+  "chat.sending": "Отправка…",
+  "chat.sending_lower": "отправка…",
+  "chat.specialist": "Специалист",
+  "chat.share_number": "Поделиться номером",
+  "chat.share_number_failed": "Не удалось отправить. Попробуйте ещё раз.",
+  "chat.starting": "Запуск…",
+  "chat.temporarily_unavailable": "Временно недоступен",
+  "chat.unavailable_body": "Напишите нам в другом канале — ответим как можно скорее.",
+  "chat.unavailable_title": "Чат временно недоступен",
+  "chat.virtual_assistant": "Виртуальный помощник",
+  "chat.voice_message": "Голосовое сообщение",
+  "chat.operator_initial": "О",
+
+  "call.accept": "Принять",
+  "call.active": "Активный звонок",
+  "call.camera_off": "Камера выключена",
+  "call.camera_unavailable": "Камера недоступна",
+  "call.cancelled_by_staff": "Сотрудник отменил приглашение. Продолжить общение можно в чате.",
+  "call.check_camera_mic": "Проверьте камеру и микрофон",
+  "call.check_connection_link": "Проверьте интернет-соединение и попробуйте снова по ссылке из чата.",
+  "call.checking_invite": "Проверяем приглашение",
+  "call.close": "Закрыть",
+  "call.connecting": "Соединяем звонок",
+  "call.connection": "Соединение",
+  "call.could_not_accept": "Не удалось принять звонок",
+  "call.could_not_act": "Не удалось выполнить действие",
+  "call.could_not_act_on_call": "Не удалось выполнить действие со звонком",
+  "call.could_not_connect": "Не удалось соединиться",
+  "call.could_not_end": "Не удалось завершить звонок",
+  "call.decline": "Отклонить",
+  "call.declined_by_you": "Вы отклонили вызов. Продолжить общение можно в чате.",
+  "call.duration": "Длительность {duration}.",
+  "call.ended": "Звонок завершён",
+  "call.establishing": "Устанавливаем защищённое соединение…",
+  "call.expired_ask_again": "Приглашение истекло. Запросите новое приглашение в чате.",
+  "call.incoming": "Входящий звонок",
+  "call.audio_call": "Аудиозвонок",
+  "call.invite_invalid": "Приглашение недействительно",
+  "call.invite_stale": "Ссылка устарела или уже была использована. Запросите новое приглашение в чате.",
+  "call.mic_off": "Ваш микрофон выключен",
+  "call.missed": "Пропущенный звонок",
+  "call.no_camera_mic_access": "Нет доступа к камере и микрофону",
+  "call.nobody_answered_ask_again": "Никто не ответил вовремя. Запросите новое приглашение в чате.",
+  "call.one_moment": "Секунду…",
+  "call.operator": "Оператор",
+  "call.operator_initials": "ОП",
+  "call.reconnecting": "Переподключение",
+  "call.speak": "Говорите",
+  "call.thanks_continue_in_chat": "Спасибо! Продолжить общение можно в чате.",
+  "call.video_not_supported": "Видеозвонки не поддерживаются",
+  "call.wait_timed_out": "Время ожидания истекло",
+  "call.update_browser": "Обновите браузер или откройте ссылку в Chrome, Safari или Edge.",
+  "call.allow_devices": "Разрешите доступ к устройствам в настройках браузера и повторите.",
+  "call.retry_check": "Повторить проверку",
+  "call.without_video": "Без видео",
+  "call.check_connection": "Проверьте интернет-соединение и попробуйте снова.",
+  "call.retry": "Повторить",
+  "call.cancelled": "Звонок отменён",
+  "call.declined": "Звонок отклонён",
+
+  "chat.could_not_send_voice": "Не удалось отправить голосовое",
+  "chat.could_not_send_file": "Не удалось отправить файл",
+  "chat.no_mic_access": "Нет доступа к микрофону",
+
+  "unit.b": "{value} Б",
+  "unit.kb": "{value} КБ",
+  "unit.mb": "{value} МБ",
+} satisfies Record<string, Message>;
+
+export type ChatMessageKey = keyof typeof ru;
diff --git a/apps/web-chat/src/useVoiceRecorder.ts b/apps/web-chat/src/useVoiceRecorder.ts
index 793151e..5c33085 100644
--- a/apps/web-chat/src/useVoiceRecorder.ts
+++ b/apps/web-chat/src/useVoiceRecorder.ts
@@ -1,4 +1,5 @@
 import { useCallback, useEffect, useRef, useState } from "react";
+import { t } from "./i18n";
 
 // Запись голосового в композере виджета (дизайн-базлайн v2, кадр H):
 // MediaRecorder, таймер, отмена/отправка. Формат — opus (ogg в Firefox,
@@ -68,7 +69,7 @@ export function useVoiceRecorder({ onSend }: { onSend: (audio: Blob, durationSec
             setSeconds(0);
           })
           .catch((error) => {
-            setErrorText(error instanceof Error ? error.message : "Не удалось отправить голосовое");
+            setErrorText(error instanceof Error ? error.message : t("chat.could_not_send_voice"));
             setState("idle");
             setSeconds(0);
           });
@@ -82,7 +83,7 @@ export function useVoiceRecorder({ onSend }: { onSend: (audio: Blob, durationSec
         setSeconds(Math.floor((Date.now() - startedAtRef.current) / 1000));
       }, 250);
     } catch {
-      setErrorText("Нет доступа к микрофону");
+      setErrorText(t("chat.no_mic_access"));
     }
   }, [cleanupStream, onSend, state, supported]);
 
diff --git a/packages/shared/package.json b/packages/shared/package.json
index fc9f9dd..63435cc 100644
--- a/packages/shared/package.json
+++ b/packages/shared/package.json
@@ -6,6 +6,7 @@
   "main": "./src/index.ts",
   "types": "./src/index.ts",
   "scripts": {
-    "typecheck": "tsc -p tsconfig.json"
+    "typecheck": "tsc -p tsconfig.json",
+    "test": "vitest run --passWithNoTests"
   }
 }
diff --git a/packages/shared/src/i18n/current.ts b/packages/shared/src/i18n/current.ts
new file mode 100644
index 0000000..6863a35
--- /dev/null
+++ b/packages/shared/src/i18n/current.ts
@@ -0,0 +1,32 @@
+// Текущий язык — один на весь фронтенд.
+//
+// Каталогов несколько: свой у рабочего места, свой у виджета, свой у общих
+// компонентов звонка в packages/ui. Язык у них обязан быть общий, иначе кнопка
+// «Завершить» в звонке осталась бы русской в английском интерфейсе — её текст
+// живёт в другом пакете. Поэтому текущий язык держится здесь, а каждый
+// переводчик только читает его.
+
+let current = "";
+const listeners = new Set<(language: string) => void>();
+
+/** Текущий язык. Пустая строка означает «ещё не выбран». */
+export function currentLanguage(): string {
+  return current;
+}
+
+/**
+ * Поставить язык для всех каталогов сразу.
+ * Возвращает true, если он действительно поменялся.
+ */
+export function setCurrentLanguage(language: string): boolean {
+  if (!language || language === current) return false;
+  current = language;
+  for (const listener of listeners) listener(language);
+  return true;
+}
+
+/** Подписка на смену языка — для того, что нельзя пересчитать рендером. */
+export function onLanguageChange(listener: (language: string) => void): () => void {
+  listeners.add(listener);
+  return () => listeners.delete(listener);
+}
diff --git a/packages/shared/src/i18n/engine.test.ts b/packages/shared/src/i18n/engine.test.ts
new file mode 100644
index 0000000..a5333fe
--- /dev/null
+++ b/packages/shared/src/i18n/engine.test.ts
@@ -0,0 +1,76 @@
+import { beforeEach, describe, expect, it } from "vitest";
+
+import { setCurrentLanguage } from "./current";
+import { createTranslator } from "./engine";
+import { createFormats } from "./formats";
+
+const catalogs = {
+  ru: {
+    "greet": "Привет, {name}",
+    "count": { one: "{count} диалог", few: "{count} диалога", many: "{count} диалогов" },
+    "only_ru": "Только по-русски",
+  },
+  en: {
+    "greet": "Hello, {name}",
+    "count": { one: "{count} conversation", other: "{count} conversations" },
+    "only_ru": "Russian only",
+  },
+};
+
+const t = createTranslator<keyof typeof catalogs.ru>({ catalogs, source: "ru" });
+
+describe("переводчик", () => {
+  beforeEach(() => {
+    setCurrentLanguage("ru");
+  });
+
+  it("подставляет параметры", () => {
+    expect(t.t("greet", { name: "Анна" })).toBe("Привет, Анна");
+  });
+
+  it("не подставляет параметр повторно из значения другого", () => {
+    // Значение пишет клиент — например, в названии диалога. Второй проход по
+    // уже подставленному тексту дал бы подстановку внутри данных.
+    expect(t.t("greet", { name: "{name}" })).toBe("Привет, {name}");
+  });
+
+  it("выбирает русскую форму числа по правилам языка", () => {
+    expect(t.tn("count", 1)).toBe("1 диалог");
+    expect(t.tn("count", 2)).toBe("2 диалога");
+    expect(t.tn("count", 5)).toBe("5 диалогов");
+    expect(t.tn("count", 21)).toBe("21 диалог");
+  });
+
+  it("выбирает английскую форму числа", () => {
+    setCurrentLanguage("en");
+    expect(t.tn("count", 1)).toBe("1 conversation");
+    expect(t.tn("count", 5)).toBe("5 conversations");
+  });
+
+  it("возвращает сам ключ, когда его нет в словаре", () => {
+    // Опечатка должна быть видна на экране, но не ронять его.
+    expect(t.t("нет такого" as keyof typeof catalogs.ru)).toBe("нет такого");
+  });
+
+  it("падает на язык-оригинал, если словаря для текущего языка нет", () => {
+    setCurrentLanguage("de");
+    expect(t.t("only_ru")).toBe("Только по-русски");
+  });
+});
+
+describe("форматы", () => {
+  const fmt = createFormats(t.language);
+
+  it("пишет короткий месяц без точки на языке интерфейса", () => {
+    setCurrentLanguage("ru");
+    expect(fmt.shortDate("2026-09-02T10:00:00Z")).toBe("2 сен");
+    setCurrentLanguage("en");
+    expect(fmt.shortDate("2026-09-02T10:00:00Z")).toBe("Sep 2");
+  });
+
+  it("отдаёт размер числом и ключом единицы", () => {
+    setCurrentLanguage("en");
+    expect(fmt.bytes(2048)).toEqual({ value: "2", unit: "kb" });
+    expect(fmt.bytes(3 * 1024 * 1024)).toEqual({ value: "3", unit: "mb" });
+  });
+});
diff --git a/packages/shared/src/i18n/engine.ts b/packages/shared/src/i18n/engine.ts
new file mode 100644
index 0000000..3aedf6c
--- /dev/null
+++ b/packages/shared/src/i18n/engine.ts
@@ -0,0 +1,102 @@
+// Движок перевода: общий для рабочего места и виджета.
+//
+// Библиотеки нет намеренно. Ключи здесь проверяет компилятор: словарь — обычный
+// объект, русский задаёт тип, английский обязан его повторить, и забытый
+// перевод падает на `tsc`, а не всплывает по-русски у клиента через месяц.
+// Плюрализация и форматы берутся из Intl, который уже есть в браузере: своё
+// правило «1 диалог / 2 диалога / 5 диалогов» писать не нужно.
+//
+// Текущий язык живёт не в переводчике, а в общем модуле (current.ts): каталогов
+// несколько — у рабочего места, у виджета, у общих компонентов звонка, — и язык
+// у них обязан быть один. Переводчик его только читает.
+
+import { currentLanguage, setCurrentLanguage } from "./current";
+
+export type PluralCategory = "one" | "few" | "many" | "other";
+
+/** Строка словаря: либо готовая фраза, либо формы для числа. */
+export type Message = string | Partial<Record<PluralCategory, string>>;
+
+/** Значения для подстановки в `{имя}`. */
+export type Params = Record<string, string | number>;
+
+export type Catalog<K extends string> = Record<K, Message>;
+
+export type Translator<K extends string> = {
+  /** Строка на текущем языке с подстановкой `{имя}`. */
+  t: (key: K, params?: Params) => string;
+  /** Строка с числом: форму выбирает язык, `{count}` подставляется сам. */
+  tn: (key: K, count: number, params?: Params) => string;
+  /** Язык, на котором отвечает этот переводчик (общий для всех каталогов). */
+  language: () => string;
+  /** Сменить язык — сразу во всех каталогах. */
+  setLanguage: (language: string) => boolean;
+  /** Языки, для которых есть словарь. */
+  languages: () => string[];
+};
+
+export type TranslatorOptions<K extends string> = {
+  catalogs: Record<string, Catalog<K>>;
+  /** Язык, на котором написан исходный словарь: на него уходит фолбэк. */
+  source: string;
+};
+
+function interpolate(text: string, params?: Params): string {
+  if (!params) return text;
+  // Подстановка идёт одним проходом по шаблону, а не последовательными
+  // replace по каждому параметру: иначе значение, само содержащее «{имя}»
+  // (а его пишет клиент — например, в названии диалога), подставилось бы
+  // ещё раз следующим параметром.
+  return text.replace(/\{(\w+)\}/g, (match, name: string) =>
+    Object.prototype.hasOwnProperty.call(params, name) ? String(params[name]) : match,
+  );
+}
+
+const pluralRules = new Map<string, Intl.PluralRules>();
+
+function categoryOf(language: string, count: number): PluralCategory {
+  let rules = pluralRules.get(language);
+  if (!rules) {
+    rules = new Intl.PluralRules(language);
+    pluralRules.set(language, rules);
+  }
+  return rules.select(count) as PluralCategory;
+}
+
+export function createTranslator<K extends string>({ catalogs, source }: TranslatorOptions<K>): Translator<K> {
+  // Язык, на котором словарь есть. Общий язык может быть тем, для которого
+  // этого каталога не завели, — тогда работает фолбэк на исходный.
+  const active = () => {
+    const language = currentLanguage();
+    return language && language in catalogs ? language : source;
+  };
+
+  function lookup(key: K): Message | undefined {
+    const table = catalogs[active()];
+    if (table && key in table) return table[key];
+    const fallback = catalogs[source];
+    return fallback ? fallback[key] : undefined;
+  }
+
+  return {
+    // Неизвестный ключ возвращается как есть: опечатка должна быть видна в
+    // интерфейсе, но не должна ронять экран пустой строкой или исключением.
+    t(key, params) {
+      const message = lookup(key);
+      if (message === undefined) return key;
+      if (typeof message === "string") return interpolate(message, params);
+      return interpolate(message.other ?? key, params);
+    },
+    tn(key, count, params) {
+      const message = lookup(key);
+      if (message === undefined) return key;
+      const merged = { count, ...params };
+      if (typeof message === "string") return interpolate(message, merged);
+      const form = message[categoryOf(active(), count)] ?? message.other;
+      return form === undefined ? key : interpolate(form, merged);
+    },
+    language: active,
+    setLanguage: setCurrentLanguage,
+    languages: () => Object.keys(catalogs),
+  };
+}
diff --git a/packages/shared/src/i18n/formats.ts b/packages/shared/src/i18n/formats.ts
new file mode 100644
index 0000000..8db4c2c
--- /dev/null
+++ b/packages/shared/src/i18n/formats.ts
@@ -0,0 +1,116 @@
+// Даты, числа и размеры на языке интерфейса.
+//
+// Почти всё делает Intl, но не всё. Дизайн-базлайн пишет короткий месяц без
+// точки — «2 сен, 14:12», — а Intl на русском даёт «2 сент.»; в английском той
+// же строке нужен другой порядок слов и другой список месяцев. Поэтому список
+// месяцев задан явно на каждый язык, а не собран из Intl и подрезан регуляркой.
+//
+// Русский месяц стоит после числа и потому в родительном падеже: «2 мая», а не
+// «2 май». Отдельного списка для «мая» без числа не нужно — там, где месяц
+// стоит один («май 2026»), продукт его не показывает.
+
+export type ByteUnitKey = "kb" | "mb";
+
+type LocaleData = {
+  /** Тег для Intl: он же уходит в NumberFormat и DateTimeFormat. */
+  tag: string;
+  /** Короткий месяц без точки, в форме «2 <месяца>». */
+  shortMonths: readonly string[];
+  /** «2 сен, 14:12» против «Sep 2, 14:12» — порядок задаёт язык. */
+  dayMonth: (day: number, month: string) => string;
+};
+
+const LOCALES: Record<string, LocaleData> = {
+  ru: {
+    tag: "ru-RU",
+    shortMonths: ["янв", "фев", "мар", "апр", "мая", "июн", "июл", "авг", "сен", "окт", "ноя", "дек"],
+    dayMonth: (day, month) => `${day} ${month}`,
+  },
+  en: {
+    tag: "en-GB",
+    shortMonths: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],
+    dayMonth: (day, month) => `${month} ${day}`,
+  },
+};
+
+const FALLBACK = LOCALES.ru;
+
+function localeOf(language: string): LocaleData {
+  return LOCALES[language] ?? FALLBACK;
+}
+
+function asDate(value: string | Date): Date | null {
+  const date = value instanceof Date ? value : new Date(value);
+  return Number.isNaN(date.getTime()) ? null : date;
+}
+
+export type Formats = {
+  /** Тег Intl текущего языка: для случаев, где нужен свой форматтер. */
+  tag: () => string;
+  /** «2 сен» / «Sep 2» — день и короткий месяц. */
+  shortDate: (value: string | Date) => string;
+  /** «2 сен 2026» / «Sep 2 2026». */
+  shortDateYear: (value: string | Date) => string;
+  /** «2 сен, 14:12» / «Sep 2, 14:12». */
+  shortDateTime: (value: string | Date) => string;
+  /** «2 сентября 2026 г.» / «2 September 2026» — Intl целиком. */
+  fullDate: (value: string | Date) => string;
+  /** «сен 2026» / «Sep 2026». */
+  monthYear: (value: string | Date) => string;
+  /** «14:12». */
+  time: (value: string | Date) => string;
+  /** Разделители разрядов по языку: «1 250» / «1,250». */
+  number: (value: number, options?: Intl.NumberFormatOptions) => string;
+  /** Размер файла: возвращает число и ключ единицы — саму единицу переводит словарь. */
+  bytes: (bytes: number) => { value: string; unit: ByteUnitKey };
+};
+
+export function createFormats(language: () => string): Formats {
+  const locale = () => localeOf(language());
+
+  const shortDate: Formats["shortDate"] = (value) => {
+    const date = asDate(value);
+    if (!date) return "";
+    const data = locale();
+    return data.dayMonth(date.getDate(), data.shortMonths[date.getMonth()]);
+  };
+
+  return {
+    tag: () => locale().tag,
+    shortDate,
+    shortDateYear(value) {
+      const date = asDate(value);
+      return date ? `${shortDate(date)} ${date.getFullYear()}` : "";
+    },
+    shortDateTime(value) {
+      const date = asDate(value);
+      if (!date) return "";
+      return `${shortDate(date)}, ${this.time(date)}`;
+    },
+    fullDate(value) {
+      const date = asDate(value);
+      if (!date) return "";
+      return new Intl.DateTimeFormat(locale().tag, { day: "numeric", month: "long", year: "numeric" }).format(date);
+    },
+    monthYear(value) {
+      const date = asDate(value);
+      if (!date) return "";
+      return `${locale().shortMonths[date.getMonth()]} ${date.getFullYear()}`;
+    },
+    time(value) {
+      const date = asDate(value);
+      if (!date) return "";
+      return new Intl.DateTimeFormat(locale().tag, { hour: "2-digit", minute: "2-digit" }).format(date);
+    },
+    number(value, options) {
+      return new Intl.NumberFormat(locale().tag, options).format(value);
+    },
+    bytes(bytes) {
+      const kilobytes = bytes / 1024;
+      if (kilobytes >= 1024) {
+        return { value: this.number(kilobytes / 1024, { maximumFractionDigits: 1 }), unit: "mb" };
+      }
+      return { value: this.number(Math.max(1, Math.round(kilobytes))), unit: "kb" };
+    },
+  };
+}
diff --git a/packages/shared/src/i18n/index.ts b/packages/shared/src/i18n/index.ts
new file mode 100644
index 0000000..540576a
--- /dev/null
+++ b/packages/shared/src/i18n/index.ts
@@ -0,0 +1,68 @@
+// Язык интерфейса: словарь, форматы и список языков.
+//
+// Список языков и правило выбора продублированы с бэкендом
+// (chatballs/i18n/languages.py) намеренно: виджет открывается у клиента до
+// любого запроса к API и должен знать свой язык сразу, а рабочее место —
+// показать логин на нужном языке ещё до того, как узнает, кто вошёл.
+// Расхождение ловится тестом, который сверяет оба списка.
+
+import { currentLanguage, onLanguageChange, setCurrentLanguage } from "./current";
+import { createFormats, type ByteUnitKey, type Formats } from "./formats";
+import { createTranslator, type Catalog, type Message, type Params, type PluralCategory } from "./engine";
+
+export { createFormats, createTranslator, currentLanguage, onLanguageChange, setCurrentLanguage };
+export type { ByteUnitKey, Catalog, Formats, Message, Params, PluralCategory };
+
+export type LanguageCode = "ru" | "en";
+
+/** Подпись — на самом языке: свой язык человек узнает в любом интерфейсе. */
+export const LANGUAGES: ReadonlyArray<{ code: LanguageCode; label: string }> = [
+  { code: "ru", label: "Русский" },
+  { code: "en", label: "English" },
+];
+
+export const LANGUAGE_CODES: readonly LanguageCode[] = LANGUAGES.map((item) => item.code);
+
+export const DEFAULT_LANGUAGE: LanguageCode = "ru";
+
+/**
+ * Привести код к поддерживаемому языку. Пустая строка — «выбора нет»:
+ * так пишется и «как в организации» в профиле, и «как в установке» в
+ * организации, поэтому неизвестный язык сводится к ней, а не к ошибке.
+ */
+export function normalizeLanguage(value: string | null | undefined): LanguageCode | "" {
+  if (!value) return "";
+  const base = value.trim().replace("_", "-").toLowerCase().split("-")[0];
+  return (LANGUAGE_CODES as readonly string[]).includes(base) ? (base as LanguageCode) : "";
+}
+
+/** Язык браузера — последний рубеж: работает до входа, когда выбора ещё нет. */
+export function browserLanguage(): LanguageCode | "" {
+  if (typeof navigator === "undefined") return "";
+  for (const candidate of navigator.languages ?? [navigator.language]) {
+    const code = normalizeLanguage(candidate);
+    if (code) return code;
+  }
+  return "";
+}
+
+/** Тот же порядок, что и на бэкенде: профиль, организация, установка, браузер. */
+export function resolveLanguage(sources: {
+  user?: string | null;
+  organization?: string | null;
+  instance?: string | null;
+}): LanguageCode {
+  for (const value of [sources.user, sources.organization, sources.instance]) {
+    const code = normalizeLanguage(value);
+    if (code) return code;
+  }
+  return browserLanguage() || DEFAULT_LANGUAGE;
+}
+
+export type I18n<K extends string> = ReturnType<typeof createTranslator<K>> & { fmt: Formats };
+
+/** Собрать переводчик и форматы, привязанные к одному текущему языку. */
+export function createI18n<K extends string>(options: { catalogs: Record<string, Catalog<K>>; source: string }): I18n<K> {
+  const translator = createTranslator(options);
+  return Object.assign(translator, { fmt: createFormats(translator.language) });
+}
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index f6a5cd3..3662d13 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -4,6 +4,29 @@ export type HubApplication = "internal-ui" | "web-chat";
 
 export const defaultApiBaseUrl = "http://localhost:8000/api/v1";
 
+export {
+  DEFAULT_LANGUAGE,
+  LANGUAGES,
+  LANGUAGE_CODES,
+  browserLanguage,
+  createFormats,
+  createI18n,
+  createTranslator,
+  currentLanguage,
+  normalizeLanguage,
+  onLanguageChange,
+  setCurrentLanguage,
+  resolveLanguage,
+  type ByteUnitKey,
+  type Catalog,
+  type Formats,
+  type I18n,
+  type LanguageCode,
+  type Message,
+  type Params,
+  type PluralCategory,
+} from "./i18n";
+
 export {
   CallRtcClient,
   type CallRtcHandlers,
diff --git a/packages/ui/package.json b/packages/ui/package.json
index 4c483f9..ac86fcb 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -6,7 +6,8 @@
   "main": "./src/index.ts",
   "types": "./src/index.ts",
   "scripts": {
-    "typecheck": "tsc -p tsconfig.json"
+    "typecheck": "tsc -p tsconfig.json",
+    "test": "vitest run --passWithNoTests"
   },
   "peerDependencies": {
     "@chatballs/shared": "0.1.0",
diff --git a/packages/ui/src/call/AudioCallView.tsx b/packages/ui/src/call/AudioCallView.tsx
index 4d5c517..8d642ce 100644
--- a/packages/ui/src/call/AudioCallView.tsx
+++ b/packages/ui/src/call/AudioCallView.tsx
@@ -10,6 +10,7 @@ import { AudioStatusIcon } from "./AudioCallIcons";
 import { MicIcon, PhoneIcon, SpeakerIcon } from "./AudioCallIcons";
 import { type AudioCallMode, type AudioCallStatus, formatDuration } from "./audioCallStates";
 import "./audio-call.css";
+import { t } from "../i18n";
 
 type Props = {
   mode: AudioCallMode;
@@ -93,24 +94,24 @@ export function AudioCallView(props: Props) {
 
         <div className="hub-audio-bottom">
           {props.mode === "incoming" && (
-            <PairBar left={{ label: "Отклонить", tone: "decline", icon: <PhoneIcon rotated /> }} right={{ label: "Принять", tone: "accept", icon: <PhoneIcon /> }} onLeft={props.onDecline} onRight={props.onAccept} />
+            <PairBar left={{ label: t("call.decline"), tone: "decline", icon: <PhoneIcon rotated /> }} right={{ label: t("call.accept"), tone: "accept", icon: <PhoneIcon /> }} onLeft={props.onDecline} onRight={props.onAccept} />
           )}
           {props.mode === "ringing" && (
-            <SingleRoundBar label="Отменить" tone="decline" icon={<PhoneIcon rotated />} onClick={props.onCancel ?? props.onEnd} />
+            <SingleRoundBar label={t("call.cancel_call")} tone="decline" icon={<PhoneIcon rotated />} onClick={props.onCancel ?? props.onEnd} />
           )}
           {props.mode === "connecting" && (
-            <SingleRoundBar label="Отменить" tone="decline" icon={<PhoneIcon rotated />} onClick={props.onCancel ?? props.onEnd} />
+            <SingleRoundBar label={t("call.cancel_call")} tone="decline" icon={<PhoneIcon rotated />} onClick={props.onCancel ?? props.onEnd} />
           )}
           {props.mode === "reconnecting" && (
-            <SingleRoundBar label="Завершить" tone="decline" icon={<PhoneIcon rotated />} onClick={props.onEnd} />
+            <SingleRoundBar label={t("call.end")} tone="decline" icon={<PhoneIcon rotated />} onClick={props.onEnd} />
           )}
           {isActive && (
             <div className="hub-audio-active">
               <div className="hub-audio-device-row">
-                <DeviceControl label="Микрофон" icon={<MicIcon on={props.micOn !== false} />} on={props.micOn !== false} onClick={props.onToggleMic} />
-                <DeviceControl label="Динамик" icon={<SpeakerIcon on={props.speakerOn !== false} />} on={props.speakerOn !== false} onClick={props.onToggleSpeaker} />
+                <DeviceControl label={t("call.mic")} icon={<MicIcon on={props.micOn !== false} />} on={props.micOn !== false} onClick={props.onToggleMic} />
+                <DeviceControl label={t("call.speaker")} icon={<SpeakerIcon on={props.speakerOn !== false} />} on={props.speakerOn !== false} onClick={props.onToggleSpeaker} />
               </div>
-              <SingleRoundBar label="Завершить" tone="decline" icon={<PhoneIcon rotated />} onClick={props.onEnd} />
+              <SingleRoundBar label={t("call.end")} tone="decline" icon={<PhoneIcon rotated />} onClick={props.onEnd} />
             </div>
           )}
           {isStatus && status && (
@@ -186,43 +187,43 @@ function EndStack({ end, onClick }: { end: BarEnd; onClick?: () => void }) {
 function StatusBar({ status, onClose, onCallAgain, onRetry, onEnd }: { status: AudioCallStatus; onClose?: () => void; onCallAgain?: () => void; onRetry?: () => void; onEnd?: () => void }) {
   const bar = status.bar;
   if (bar === "reconnect") {
-    return <SingleRoundBar label="Завершить" tone="decline" icon={<PhoneIcon rotated />} onClick={onEnd} />;
+    return <SingleRoundBar label={t("call.end")} tone="decline" icon={<PhoneIcon rotated />} onClick={onEnd} />;
   }
   if (bar === "close") {
     return (
       <div className="hub-audio-pill-bar">
-        <PillButton kind="ghost" onClick={onClose}>Закрыть</PillButton>
+        <PillButton kind="ghost" onClick={onClose}>{t("call.close")}</PillButton>
       </div>
     );
   }
   if (bar === "retrySingle") {
     return (
       <div className="hub-audio-pill-bar">
-        <PillButton kind="solid" onClick={onCallAgain}>Позвонить снова</PillButton>
+        <PillButton kind="solid" onClick={onCallAgain}>{t("call.call_again")}</PillButton>
       </div>
     );
   }
   if (bar === "retryClose") {
     return (
       <div className="hub-audio-pill-bar two">
-        <PillButton kind="ghost" onClick={onClose}>Закрыть</PillButton>
-        <PillButton kind="solid" onClick={onRetry}>Повторить</PillButton>
+        <PillButton kind="ghost" onClick={onClose}>{t("call.close")}</PillButton>
+        <PillButton kind="solid" onClick={onRetry}>{t("call.retry")}</PillButton>
       </div>
     );
   }
   if (bar === "retryCheck") {
     return (
       <div className="hub-audio-pill-bar two">
-        <PillButton kind="ghost" onClick={onClose}>Закрыть</PillButton>
-        <PillButton kind="solid" onClick={onRetry}>Повторить проверку</PillButton>
+        <PillButton kind="ghost" onClick={onClose}>{t("call.close")}</PillButton>
+        <PillButton kind="solid" onClick={onRetry}>{t("call.retry_check")}</PillButton>
       </div>
     );
   }
   // ended / connecting
   return (
     <div className="hub-audio-pill-bar two">
-      <PillButton kind="ghost" onClick={onClose}>Закрыть</PillButton>
-      <PillButton kind="solid" onClick={onCallAgain}>Позвонить снова</PillButton>
+      <PillButton kind="ghost" onClick={onClose}>{t("call.close")}</PillButton>
+      <PillButton kind="solid" onClick={onCallAgain}>{t("call.call_again")}</PillButton>
     </div>
   );
 }
@@ -236,7 +237,7 @@ function durationPill(duration?: number | null) {
   return (
     <div className="hub-audio-duration-pill">
       <svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><circle cx="12" cy="12" r="9" /><path d="M12 7v5l3 2" /></svg>
-      Длительность {formatDuration(duration)}
+      {t("call.duration", { duration: formatDuration(duration) })}
     </div>
   );
 }
@@ -249,16 +250,16 @@ function bgState(mode: AudioCallMode): string {
 
 function defaultStatusLabel(mode: AudioCallMode, status?: AudioCallStatus): string {
   if (status) return status.title;
-  if (mode === "incoming") return "Входящий звонок";
-  if (mode === "ringing") return "Исходящий звонок";
-  if (mode === "active") return "Аудиозвонок";
-  if (mode === "connecting") return "Соединение";
-  if (mode === "reconnecting") return "Переподключение";
-  return "Звонок завершён";
+  if (mode === "incoming") return t("call.incoming");
+  if (mode === "ringing") return t("call.outgoing");
+  if (mode === "active") return t("call.audio_call");
+  if (mode === "connecting") return t("call.connecting_status");
+  if (mode === "reconnecting") return t("call.reconnecting");
+  return t("call.call_ended");
 }
 
 function defaultSubCaption(mode: AudioCallMode, micOn?: boolean): string {
-  if (mode === "active") return micOn ? "Говорите" : "Ваш микрофон выключен";
+  if (mode === "active") return micOn ? t("call.speak") : t("call.mic_off");
   if (mode === "incoming" || mode === "ringing") return "";
   return "";
 }
diff --git a/packages/ui/src/call/CallView.tsx b/packages/ui/src/call/CallView.tsx
index 0d68289..3297967 100644
--- a/packages/ui/src/call/CallView.tsx
+++ b/packages/ui/src/call/CallView.tsx
@@ -2,6 +2,7 @@ import { useEffect, useRef, useState, type ReactNode } from "react";
 
 import { CloseIcon, DeviceIcon, FullscreenIcon, PhoneIcon, SpinnerIcon, StatusIcon, type StatusIconName } from "./CallIcons";
 import "./call-view.css";
+import { t } from "../i18n";
 
 export type CallViewMode = "ringing" | "precall" | "connecting" | "active" | "reconnecting" | "status";
 
@@ -82,7 +83,7 @@ export function CallView(props: Props) {
           <span>{props.subtitle}</span>
         </div>
         {isLive && <span className={`hub-call-timer ${props.mode === "reconnecting" ? "warn" : ""}`}><i />{timer}</span>}
-        {props.onClose && <button className="hub-call-close" onClick={handleClose} aria-label={isFullscreen ? "Выйти из полноэкранного режима" : "Закрыть"}><CloseIcon /></button>}
+        {props.onClose && <button className="hub-call-close" onClick={handleClose} aria-label={isFullscreen ? t("call.exit_fullscreen") : t("call.close")}><CloseIcon /></button>}
       </header>
 
       <div className="hub-call-media">
@@ -92,26 +93,26 @@ export function CallView(props: Props) {
         {isLive && props.remoteStream != null && <Video stream={props.remoteStream} className="hub-call-remote-video" />}
 
         {props.mode === "ringing" && (
-          <CallAvatar name={props.peerName} initials={props.peerInitials} color={props.peerAvatarColor} caption="Вызываем…" rings />
+          <CallAvatar name={props.peerName} initials={props.peerInitials} color={props.peerAvatarColor} caption={t("call.calling")} rings />
         )}
 
         {props.mode === "precall" && (
           showLocalVideo
             ? <Video stream={props.localStream} muted mirrored className="hub-call-preview-video" />
-            : <CallAvatar name="Вы" initials="ВЫ" color="#595959" caption={props.mediaCaption ?? "Камера выключена"} />
+            : <CallAvatar name={t("call.you")} initials={t("call.you_initials")} color="#595959" caption={props.mediaCaption ?? t("call.camera_off")} />
         )}
 
         {isLive && !showRemoteVideo && (
-          <CallAvatar name={props.peerName} initials={props.peerInitials} color={props.peerAvatarColor} caption="Камера собеседника выключена" />
+          <CallAvatar name={props.peerName} initials={props.peerInitials} color={props.peerAvatarColor} caption={t("call.peer_camera_off")} />
         )}
 
         {isLive && (
           <>
-            {props.mode === "reconnecting" && <div className="hub-call-reconnect"><SpinnerIcon />Связь прервана · восстанавливаем соединение…</div>}
+            {props.mode === "reconnecting" && <div className="hub-call-reconnect"><SpinnerIcon />{t("call.reconnecting_inline")}</div>}
             <div className="hub-call-name-label">{props.remoteMicOn === false && <DeviceIcon kind="mic" on={false} />}<span>{props.peerName}</span></div>
             <div className="hub-call-pip">
-              {showLocalVideo ? <Video stream={props.localStream} muted mirrored className="hub-call-local-video" /> : <span className="hub-call-avatar pip">ВЫ</span>}
-              <b>Вы</b>
+              {showLocalVideo ? <Video stream={props.localStream} muted mirrored className="hub-call-local-video" /> : <span className="hub-call-avatar pip">{t("call.you_initials")}</span>}
+              <b>{t("call.you")}</b>
             </div>
           </>
         )}
@@ -119,16 +120,16 @@ export function CallView(props: Props) {
         {(props.mode === "connecting" || props.mode === "status") && props.status && <StatusView status={props.status} />}
       </div>
 
-      {props.mode === "ringing" && props.onCancel && <RingingBar label={props.cancelLabel ?? "Отменить"} onClick={props.onCancel} />}
+      {props.mode === "ringing" && props.onCancel && <RingingBar label={props.cancelLabel ?? t("call.cancel_call")} onClick={props.onCancel} />}
       {props.mode === "precall" && (
         <div className="hub-call-precall-bar">
           <div className="hub-call-device-row">
-            <DeviceControl label="Микрофон" kind="mic" on={props.micOn !== false} onClick={props.onToggleMic} />
-            <DeviceControl label="Камера" kind="cam" on={props.camOn !== false} onClick={props.onToggleCam} />
+            <DeviceControl label={t("call.mic")} kind="mic" on={props.micOn !== false} onClick={props.onToggleMic} />
+            <DeviceControl label={t("call.camera")} kind="cam" on={props.camOn !== false} onClick={props.onToggleCam} />
           </div>
           <div className="hub-call-join-row">
-            <button className="secondary" onClick={props.onCancel}>{props.cancelLabel ?? "Отмена"}</button>
-            <button className="primary" onClick={props.onJoin} disabled={props.joining}>{props.joining ? "Подключение…" : "Присоединиться"}</button>
+            <button className="secondary" onClick={props.onCancel}>{props.cancelLabel ?? t("call.cancel")}</button>
+            <button className="primary" onClick={props.onJoin} disabled={props.joining}>{props.joining ? t("call.joining") : t("call.join")}</button>
           </div>
         </div>
       )}
@@ -136,8 +137,8 @@ export function CallView(props: Props) {
         <div className="hub-call-active-bar">
           <DeviceButton kind="mic" on={props.micOn !== false} onClick={props.onToggleMic} />
           <DeviceButton kind="cam" on={props.camOn !== false} onClick={props.onToggleCam} />
-          <button className="hub-call-round" onClick={toggleFullscreen} aria-label={isFullscreen ? "Выйти из полноэкранного режима" : "Полный экран"}><FullscreenIcon /></button>
-          <button className="hub-call-end" onClick={props.onEnd} aria-label="Завершить"><PhoneIcon /></button>
+          <button className="hub-call-round" onClick={toggleFullscreen} aria-label={isFullscreen ? t("call.exit_fullscreen") : t("call.enter_fullscreen")}><FullscreenIcon /></button>
+          <button className="hub-call-end" onClick={props.onEnd} aria-label={t("call.end")}><PhoneIcon /></button>
         </div>
       )}
     </div>
@@ -153,7 +154,7 @@ function StatusView({ status }: { status: CallViewStatus }) {
 }
 
 function DeviceButton({ kind, on, onClick }: { kind: "mic" | "cam"; on: boolean; onClick?: () => void }) {
-  return <button className={`hub-call-device${on ? "" : " off"}`} onClick={onClick} aria-label={kind === "mic" ? "Микрофон" : "Камера"}><DeviceIcon kind={kind} on={on} /></button>;
+  return <button className={`hub-call-device${on ? "" : " off"}`} onClick={onClick} aria-label={kind === "mic" ? t("call.mic") : t("call.camera")}><DeviceIcon kind={kind} on={on} /></button>;
 }
 
 function DeviceControl({ label, kind, on, onClick }: { label: string; kind: "mic" | "cam"; on: boolean; onClick?: () => void }) {
diff --git a/packages/ui/src/call/audioCallStates.ts b/packages/ui/src/call/audioCallStates.ts
index faec10e..7a057e0 100644
--- a/packages/ui/src/call/audioCallStates.ts
+++ b/packages/ui/src/call/audioCallStates.ts
@@ -2,6 +2,7 @@
 // Тексты/иконки/тоны вынесены отдельно, чтобы AudioCallView оставался
 // composition-only и не смешивал разметку со справочником состояний.
 
+import { t } from "../i18n";
 import type { AudioStatusIconName } from "./AudioCallIcons";
 
 export type AudioCallMode = "incoming" | "ringing" | "connecting" | "active" | "reconnecting" | "status";
@@ -39,35 +40,34 @@ export const TERMINAL_CALL_STATUSES = new Set([
 export const isTerminalCallStatus = (status?: string) => Boolean(status && TERMINAL_CALL_STATUSES.has(status));
 
 function dur(prefix: string, duration?: number | null) {
-  return duration != null && duration > 0 ? `${prefix}Длительность ${formatDuration(duration)}. ` : prefix;
+  return duration != null && duration > 0 ? `${prefix}${t("call.duration", { duration: formatDuration(duration) })} ` : prefix;
 }
 
 // Справочник статусов-центров: процессы + ошибки + терминалы.
 // `duration` подставляется только там, где разговор реально состоялся.
 export function buildAudioStatus(status: string, peerName: string, duration?: number | null): AudioStatusEntry | null {
-  const p = `${peerName} `;
   switch (status) {
     case "connecting":
     case "CONNECTING":
-      return { icon: "spinner", tone: "neutral", title: "Соединяем", caption: "Устанавливаем защищённое соединение…", bar: "ended" };
+      return { icon: "spinner", tone: "neutral", title: t("call.connecting"), caption: t("call.establishing"), bar: "ended" };
     case "reconnecting":
-      return { icon: "spinner", tone: "neutral", title: "Связь прервана", caption: "Восстанавливаем соединение…", bar: "reconnect" };
+      return { icon: "spinner", tone: "neutral", title: t("call.reconnecting_title"), caption: t("call.reconnecting_caption"), bar: "reconnect" };
     case "DECLINED":
-      return { icon: "declined", tone: "neutral", title: "Звонок отклонён", caption: `${p}отклонил(а) вызов.`, bar: "retrySingle" };
+      return { icon: "declined", tone: "neutral", title: t("call.call_declined"), caption: t("call.declined_by", { name: peerName }), bar: "retrySingle" };
     case "MISSED":
-      return { icon: "missed", tone: "warn", title: "Пропущенный звонок", caption: `${p}не ответил(а) на вызов.`, bar: "retrySingle" };
+      return { icon: "missed", tone: "warn", title: t("call.missed"), caption: t("call.unanswered_by", { name: peerName }), bar: "retrySingle" };
     case "EXPIRED":
-      return { icon: "clock", tone: "warn", title: "Время ожидания истекло", caption: "Никто не ответил вовремя. Попробуйте позвонить снова.", bar: "retrySingle" };
+      return { icon: "clock", tone: "warn", title: t("call.wait_timed_out"), caption: t("call.nobody_answered"), bar: "retrySingle" };
     case "CANCELLED":
-      return { icon: "declined", tone: "neutral", title: "Звонок отменён", caption: "Приглашение отменено.", bar: "ended" };
+      return { icon: "declined", tone: "neutral", title: t("call.call_cancelled"), caption: t("call.invitation_cancelled"), bar: "ended" };
     case "FAILED":
-      return { icon: "alert", tone: "error", title: "Не удалось соединиться", caption: `${dur("", duration)}Проверьте интернет-соединение и попробуйте снова.`, bar: "retryClose" };
+      return { icon: "alert", tone: "error", title: t("call.unable_to_connect"), caption: `${dur("", duration)}${t("call.check_connection")}`, bar: "retryClose" };
     case "ENDED":
-      return { icon: "clock", tone: "neutral", title: "Звонок завершён", caption: `${dur("", duration)}Разговор завершён.`, bar: "ended" };
+      return { icon: "clock", tone: "neutral", title: t("call.call_ended"), caption: `${dur("", duration)}${t("call.conversation_ended")}`, bar: "ended" };
     case "nodevice":
-      return { icon: "nodevice", tone: "error", title: "Нет доступа к микрофону", caption: "Разрешите доступ к микрофону в настройках браузера и повторите.", bar: "retryCheck" };
+      return { icon: "nodevice", tone: "error", title: t("call.no_mic_access"), caption: t("call.allow_mic"), bar: "retryCheck" };
     case "unsupported":
-      return { icon: "unsupported", tone: "error", title: "Аудиозвонки не поддерживаются", caption: "Обновите браузер или откройте ссылку в Chrome, Safari или Edge.", bar: "retryCheck" };
+      return { icon: "unsupported", tone: "error", title: t("call.audio_not_supported"), caption: t("call.link_unsupported_browser"), bar: "retryCheck" };
     default:
       return null;
   }
diff --git a/packages/ui/src/i18n/en.ts b/packages/ui/src/i18n/en.ts
new file mode 100644
index 0000000..4808b2b
--- /dev/null
+++ b/packages/ui/src/i18n/en.ts
@@ -0,0 +1,59 @@
+// English catalogue for the shared call and loader components.
+
+import type { Message } from "@chatballs/shared";
+
+import type { UiMessageKey } from "./ru";
+
+export const en: Record<UiMessageKey, Message> = {
+  "call.accept": "Accept",
+  "call.audio_call": "Audio call",
+  "call.audio_not_supported": "Audio calls are not supported",
+  "call.call_again": "Call again",
+  "call.call_cancelled": "Call cancelled",
+  "call.call_declined": "Call declined",
+  "call.call_ended": "Call ended",
+  "call.calling": "Calling…",
+  "call.camera": "Camera",
+  "call.camera_off": "The camera is off",
+  "call.cancel": "Cancel",
+  "call.cancel_call": "Cancel",
+  "call.close": "Close",
+  "call.conversation_ended": "The conversation has ended.",
+  "call.connecting": "Connecting",
+  "call.connecting_status": "Connecting",
+  "call.check_connection": "Check your internet connection and try again.",
+  "call.declined_by": "{name} declined the call.",
+  "call.decline": "Decline",
+  "call.duration": "Duration {duration}.",
+  "call.end": "End",
+  "call.enter_fullscreen": "Full screen",
+  "call.establishing": "Establishing a secure connection…",
+  "call.exit_fullscreen": "Leave full screen",
+  "call.incoming": "Incoming call",
+  "call.invitation_cancelled": "The invitation was cancelled.",
+  "call.join": "Join",
+  "call.joining": "Joining…",
+  "call.link_unsupported_browser": "Update your browser or open the link in Chrome, Safari or Edge.",
+  "call.mic": "Microphone",
+  "call.mic_off": "Your microphone is off",
+  "call.missed": "Missed call",
+  "call.no_mic_access": "No access to the microphone",
+  "call.nobody_answered": "Nobody answered in time. Try calling again.",
+  "call.outgoing": "Outgoing call",
+  "call.peer_camera_off": "The other side's camera is off",
+  "call.reconnecting": "Reconnecting",
+  "call.reconnecting_inline": "Connection lost · reconnecting…",
+  "call.reconnecting_caption": "Reconnecting…",
+  "call.reconnecting_title": "Connection lost",
+  "call.retry": "Try again",
+  "call.retry_check": "Check again",
+  "call.speak": "Go ahead",
+  "call.speaker": "Speaker",
+  "call.unanswered_by": "{name} did not answer the call.",
+  "call.unable_to_connect": "Could not connect",
+  "call.wait_timed_out": "The wait timed out",
+  "call.you": "You",
+  "call.you_initials": "YOU",
+  "call.allow_mic": "Allow microphone access in the browser settings and try again.",
+  "common.loading": "Loading",
+};
diff --git a/packages/ui/src/i18n/index.ts b/packages/ui/src/i18n/index.ts
new file mode 100644
index 0000000..14c495d
--- /dev/null
+++ b/packages/ui/src/i18n/index.ts
@@ -0,0 +1,12 @@
+// Перевод общих компонентов. Язык не выбирается здесь: его ставит приложение,
+// а пакет только читает общий текущий язык из @chatballs/shared.
+
+import { createI18n } from "@chatballs/shared";
+
+import { en } from "./en";
+import { ru, type UiMessageKey } from "./ru";
+
+const i18n = createI18n<UiMessageKey>({ catalogs: { ru, en }, source: "ru" });
+
+export type { UiMessageKey };
+export const t = i18n.t;
diff --git a/packages/ui/src/i18n/ru.ts b/packages/ui/src/i18n/ru.ts
new file mode 100644
index 0000000..9af1639
--- /dev/null
+++ b/packages/ui/src/i18n/ru.ts
@@ -0,0 +1,63 @@
+// Словарь общих компонентов: экран звонка и загрузка.
+//
+// У пакета свой словарь, а не общий с рабочим местом: пакет не знает, кто его
+// подключил, — и виджет клиента, и рабочее место сотрудника берут отсюда одни
+// и те же кнопки звонка. Язык при этом общий: его держит @chatballs/shared.
+
+import type { Message } from "@chatballs/shared";
+
+export const ru = {
+  "call.accept": "Принять",
+  "call.audio_call": "Аудиозвонок",
+  "call.audio_not_supported": "Аудиозвонки не поддерживаются",
+  "call.call_again": "Позвонить снова",
+  "call.call_cancelled": "Звонок отменён",
+  "call.call_declined": "Звонок отклонён",
+  "call.call_ended": "Звонок завершён",
+  "call.calling": "Вызываем…",
+  "call.camera": "Камера",
+  "call.camera_off": "Камера выключена",
+  "call.cancel": "Отмена",
+  "call.cancel_call": "Отменить",
+  "call.close": "Закрыть",
+  "call.conversation_ended": "Разговор завершён.",
+  "call.connecting": "Соединяем",
+  "call.connecting_status": "Соединение",
+  "call.check_connection": "Проверьте интернет-соединение и попробуйте снова.",
+  "call.declined_by": "{name} отклонил(а) вызов.",
+  "call.decline": "Отклонить",
+  "call.duration": "Длительность {duration}.",
+  "call.end": "Завершить",
+  "call.enter_fullscreen": "Полный экран",
+  "call.establishing": "Устанавливаем защищённое соединение…",
+  "call.exit_fullscreen": "Выйти из полноэкранного режима",
+  "call.incoming": "Входящий звонок",
+  "call.invitation_cancelled": "Приглашение отменено.",
+  "call.join": "Присоединиться",
+  "call.joining": "Подключение…",
+  "call.link_unsupported_browser": "Обновите браузер или откройте ссылку в Chrome, Safari или Edge.",
+  "call.mic": "Микрофон",
+  "call.mic_off": "Ваш микрофон выключен",
+  "call.missed": "Пропущенный звонок",
+  "call.no_mic_access": "Нет доступа к микрофону",
+  "call.nobody_answered": "Никто не ответил вовремя. Попробуйте позвонить снова.",
+  "call.outgoing": "Исходящий звонок",
+  "call.peer_camera_off": "Камера собеседника выключена",
+  "call.reconnecting": "Переподключение",
+  "call.reconnecting_inline": "Связь прервана · восстанавливаем соединение…",
+  "call.reconnecting_caption": "Восстанавливаем соединение…",
+  "call.reconnecting_title": "Связь прервана",
+  "call.retry": "Повторить",
+  "call.retry_check": "Повторить проверку",
+  "call.speak": "Говорите",
+  "call.speaker": "Динамик",
+  "call.unanswered_by": "{name} не ответил(а) на вызов.",
+  "call.unable_to_connect": "Не удалось соединиться",
+  "call.wait_timed_out": "Время ожидания истекло",
+  "call.you": "Вы",
+  "call.you_initials": "ВЫ",
+  "call.allow_mic": "Разрешите доступ к микрофону в настройках браузера и повторите.",
+  "common.loading": "Загрузка",
+} satisfies Record<string, Message>;
+
+export type UiMessageKey = keyof typeof ru;
diff --git a/packages/ui/src/loader/Loader.tsx b/packages/ui/src/loader/Loader.tsx
index bc411fe..e3a52aa 100644
--- a/packages/ui/src/loader/Loader.tsx
+++ b/packages/ui/src/loader/Loader.tsx
@@ -1,5 +1,6 @@
 import { LOADER_DURATION, LOADER_PATH, LOADER_VALUES } from "./loaderFrames";
 import "./loader.css";
+import { t } from "../i18n";
 
 // Общий прелоадер продукта (файл владельца, 2026-09-07): капля делится надвое
 // и сливается обратно — морфинг одного контура через SMIL. Цвет — currentColor,
@@ -14,7 +15,7 @@ export function Loader({ size = 28, className = "" }: { size?: number; className
       height={size}
       fill="currentColor"
       role="status"
-      aria-label="Загрузка"
+      aria-label={t("common.loading")}
     >
       <path d={LOADER_PATH}>
         <animate