diff --git a/PIPELINE_TODO.md b/PIPELINE_TODO.md
index 294f881..a917099 100644
--- a/PIPELINE_TODO.md
+++ b/PIPELINE_TODO.md
@@ -99,7 +99,7 @@
 - [x] Для `continue_without_stage` писать короткий debug/audit без user notification.
 - [x] Для `use_alternate_target` логировать исходный и alternate target.
 - [x] Для `fail_request` завершать request через единый error path.
-- [ ] Добавить локализацию fallback messages.
+- [x] Добавить локализацию fallback messages.
 - [x] Добавить отдельные тексты для RAG failure, STT failure, TTS failure, tool failure.
 - [x] Не спамить пользователя несколькими fallback notifications за один request.
 - [x] Сохранять fallback notification в `request_audit.details`.
diff --git a/locales/en.json b/locales/en.json
index e067487..c6c6e5f 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -8,6 +8,13 @@
   },
   "providerChoice.default": "Default",
   "errorText": "⚠️ An error occurred.",
+  "pipelineFallback.generic": "⚠️ I had to skip part of the request, but I can continue.",
+  "pipelineFallback.notifyUser": "⚠️ I hit a problem and need to continue with a fallback.",
+  "pipelineFallback.failRequest": "⚠️ I could not finish this request.",
+  "pipelineFallback.documentRag": "⚠️ Document retrieval failed, so I will answer without RAG.",
+  "pipelineFallback.speechToText": "⚠️ Speech transcription failed, so I will continue without the audio transcript.",
+  "pipelineFallback.textToSpeech": "⚠️ Text-to-speech failed, so I will continue without audio output.",
+  "pipelineFallback.toolLoop": "⚠️ Tool execution failed, so I will continue without that tool.",
   "waitThinkText": "⏳ Let me think...",
   "analyzingPictureText": "🔍 Analyzing the image...",
   "analyzingPicturesText": "🔍 Analyzing the images...",
diff --git a/locales/ru.json b/locales/ru.json
index e75fe00..04f0d39 100644
--- a/locales/ru.json
+++ b/locales/ru.json
@@ -8,6 +8,13 @@
   },
   "providerChoice.default": "По умолчанию",
   "errorText": "⚠️ Произошла ошибка.",
+  "pipelineFallback.generic": "⚠️ Мне пришлось пропустить часть запроса, но я могу продолжить.",
+  "pipelineFallback.notifyUser": "⚠️ Возникла проблема, и я продолжу с запасным вариантом.",
+  "pipelineFallback.failRequest": "⚠️ Я не смог завершить этот запрос.",
+  "pipelineFallback.documentRag": "⚠️ Не удалось получить документы, поэтому я отвечу без RAG.",
+  "pipelineFallback.speechToText": "⚠️ Не удалось распознать речь, поэтому я продолжу без расшифровки аудио.",
+  "pipelineFallback.textToSpeech": "⚠️ Не удалось выполнить синтез речи, поэтому я продолжу без аудио.",
+  "pipelineFallback.toolLoop": "⚠️ Не удалось выполнить инструменты, поэтому я продолжу без них.",
   "waitThinkText": "⏳ Дайте-ка подумать...",
   "analyzingPictureText": "🔍 Анализирую изображение...",
   "analyzingPicturesText": "🔍 Анализирую изображения...",
diff --git a/locales/ua.json b/locales/ua.json
index 4574531..947c1ab 100644
--- a/locales/ua.json
+++ b/locales/ua.json
@@ -8,6 +8,13 @@
   },
   "providerChoice.default": "За замовчуванням",
   "errorText": "⚠️ Сталася помилка.",
+  "pipelineFallback.generic": "⚠️ Мені довелося пропустити частину запиту, але я можу продовжити.",
+  "pipelineFallback.notifyUser": "⚠️ Виникла проблема, і я продовжу із запасним варіантом.",
+  "pipelineFallback.failRequest": "⚠️ Я не зміг завершити цей запит.",
+  "pipelineFallback.documentRag": "⚠️ Не вдалося отримати документи, тому я відповім без RAG.",
+  "pipelineFallback.speechToText": "⚠️ Не вдалося розпізнати мовлення, тому я продовжу без розшифровки аудіо.",
+  "pipelineFallback.textToSpeech": "⚠️ Не вдалося виконати синтез мовлення, тому я продовжу без аудіо.",
+  "pipelineFallback.toolLoop": "⚠️ Не вдалося виконати інструменти, тому я продовжу без них.",
   "waitThinkText": "⏳ Дайте-но подумати...",
   "analyzingPictureText": "🔍 Аналізую зображення...",
   "analyzingPicturesText": "🔍 Аналізую зображення...",
diff --git a/src/ai/unified-ai-request-pipeline.ts b/src/ai/unified-ai-request-pipeline.ts
index 97b641a..ca355b1 100644
--- a/src/ai/unified-ai-request-pipeline.ts
+++ b/src/ai/unified-ai-request-pipeline.ts
@@ -292,7 +292,7 @@ export async function prepareUnifiedAiRequestPipeline(params: {
     ];
 
     const state = createAiRequestPipelineState(options);
-    const fallbackNotifier = new PipelineFallbackNotifier(options.msg);
+    const fallbackNotifier = new PipelineFallbackNotifier(options.msg, options.responseLanguage);
     const pipeline = new UserRequestPipeline({
         stages,
         stageNames: [
diff --git a/src/ai/unified-ai-response-pipeline.ts b/src/ai/unified-ai-response-pipeline.ts
index 0452381..b80da70 100644
--- a/src/ai/unified-ai-response-pipeline.ts
+++ b/src/ai/unified-ai-response-pipeline.ts
@@ -167,7 +167,7 @@ export async function runUnifiedAiResponsePipeline(params: {
 }): Promise<void> {
     const {options, config, downloads, prepared, streamMessage, controller} = params;
     const state = createResponsePipelineState(options);
-    const fallbackNotifier = new PipelineFallbackNotifier(options.msg);
+    const fallbackNotifier = new PipelineFallbackNotifier(options.msg, options.responseLanguage);
     const adapter = getProviderAdapter(options.provider);
     let selectedToolNames: string[] = [];
     let filteredTools: unknown[] = [];
diff --git a/src/ai/user-request-pipeline/fallback-notifier-text.ts b/src/ai/user-request-pipeline/fallback-notifier-text.ts
index d375395..854e8ee 100644
--- a/src/ai/user-request-pipeline/fallback-notifier-text.ts
+++ b/src/ai/user-request-pipeline/fallback-notifier-text.ts
@@ -1,27 +1,26 @@
+import {Localization} from "../../common/localization.js";
 import type {PipelineFallbackAction, PipelineStageName} from "./types.js";
 
-const DEFAULT_TEXT = "⚠️ I had to skip part of the request, but I can continue.";
-const NOTIFY_TEXT = "⚠️ I hit a problem and need to continue with a fallback.";
-const FAIL_TEXT = "⚠️ I could not finish this request.";
-const RAG_TEXT = "⚠️ Document retrieval failed, so I will answer without RAG.";
-const STT_TEXT = "⚠️ Speech transcription failed, so I will continue without the audio transcript.";
-const TTS_TEXT = "⚠️ Text-to-speech failed, so I will continue without audio output.";
-const TOOL_TEXT = "⚠️ Tool execution failed, so I will continue without that tool.";
-
-export function resolvePipelineFallbackText(stage: PipelineStageName, action: PipelineFallbackAction): string | undefined {
+export function resolvePipelineFallbackText(
+    stage: PipelineStageName,
+    action: PipelineFallbackAction,
+    locale?: string,
+): string | undefined {
     if (action === "continue_without_stage") return undefined;
-    if (action === "fail_request") return FAIL_TEXT;
+    if (action === "fail_request") return Localization.text("pipelineFallback.failRequest", {}, "⚠️ I could not finish this request.", locale);
 
     switch (stage) {
         case "speech_to_text":
-            return STT_TEXT;
+            return Localization.text("pipelineFallback.speechToText", {}, "⚠️ Speech transcription failed, so I will continue without the audio transcript.", locale);
         case "document_rag":
-            return RAG_TEXT;
+            return Localization.text("pipelineFallback.documentRag", {}, "⚠️ Document retrieval failed, so I will answer without RAG.", locale);
         case "tool_loop":
-            return TOOL_TEXT;
+            return Localization.text("pipelineFallback.toolLoop", {}, "⚠️ Tool execution failed, so I will continue without that tool.", locale);
         case "text_to_speech":
-            return TTS_TEXT;
+            return Localization.text("pipelineFallback.textToSpeech", {}, "⚠️ Text-to-speech failed, so I will continue without audio output.", locale);
         default:
-            return action === "notify_user" ? NOTIFY_TEXT : DEFAULT_TEXT;
+            return action === "notify_user"
+                ? Localization.text("pipelineFallback.notifyUser", {}, "⚠️ I hit a problem and need to continue with a fallback.", locale)
+                : Localization.text("pipelineFallback.generic", {}, "⚠️ I had to skip part of the request, but I can continue.", locale);
     }
 }
diff --git a/src/ai/user-request-pipeline/fallback-notifier.ts b/src/ai/user-request-pipeline/fallback-notifier.ts
index f4ae06c..fd58f90 100644
--- a/src/ai/user-request-pipeline/fallback-notifier.ts
+++ b/src/ai/user-request-pipeline/fallback-notifier.ts
@@ -1,4 +1,5 @@
 import type {Message} from "typescript-telegram-bot-api";
+import {Localization} from "../../common/localization.js";
 import {replyToMessage, logError} from "../../util/utils.js";
 import type {PipelineFallbackDecision} from "./fallback-executor.js";
 import {PipelineFallbackNotificationRegistry} from "./fallback-notifier-registry.js";
@@ -9,6 +10,7 @@ export class PipelineFallbackNotifier {
 
     constructor(
         private readonly sourceMessage: Message,
+        private readonly responseLanguage?: string,
         private readonly sendFallbackMessage: (text: string) => Promise<void> = async text => {
             await replyToMessage({
                 message: this.sourceMessage,
@@ -22,7 +24,10 @@ export class PipelineFallbackNotifier {
             return {notified: false};
         }
 
-        const text = resolvePipelineFallbackText(decision.stage, decision.action);
+        const locale = this.responseLanguage === "default"
+            ? Localization.currentLocale()
+            : Localization.normalizeLocale(this.responseLanguage) ?? Localization.currentLocale();
+        const text = resolvePipelineFallbackText(decision.stage, decision.action, locale);
         if (!text) {
             return {notified: false};
         }
diff --git a/test/pipeline-fallback-notifier.test.mjs b/test/pipeline-fallback-notifier.test.mjs
index 43805eb..d98d054 100644
--- a/test/pipeline-fallback-notifier.test.mjs
+++ b/test/pipeline-fallback-notifier.test.mjs
@@ -10,6 +10,11 @@ test("pipeline fallback text maps notify_user to a user-facing message", () => {
     assert.match(resolvePipelineFallbackText("tool_loop", "notify_user"), /tool/i);
 });
 
+test("pipeline fallback text is localized when locale is provided", () => {
+    assert.match(resolvePipelineFallbackText("document_rag", "notify_user", "ru"), /RAG|документ/i);
+    assert.match(resolvePipelineFallbackText("text_to_speech", "notify_user", "ua"), /аудіо|мовлення/i);
+});
+
 test("pipeline fallback text stays silent for continue_without_stage", () => {
     assert.equal(resolvePipelineFallbackText("document_rag", "continue_without_stage"), undefined);
     assert.equal(resolvePipelineFallbackText("tool_loop", "continue_without_stage"), undefined);