Localize pipeline fallback notifications

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};
         }