feat(insight): add multi-language support for insight reports

packages/cli/src/i18n/locales/de.js

@@ -1459,4 +1459,9 @@ export default {
     '{{region}}-Konfiguration erfolgreich aktualisiert. Modell auf "{{model}}" umgeschaltet.',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Erfolgreich mit {{region}} authentifiziert. API-Schlüssel und Modellkonfigurationen wurden in settings.json gespeichert (gesichert).',
+  // ===========================================================================
+  // Insight Report - Language Support
+  // ===========================================================================
+  'Generating insights in {{language}}...':
+    'Generiere Einblicke auf {{language}}...',
 };

packages/cli/src/i18n/locales/en.js

@@ -1448,4 +1448,10 @@ export default {
     '{{region}} configuration updated successfully. Model switched to "{{model}}".',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).',
+
+  // ============================================================================
+  // Insight Report - Language Support
+  // ============================================================================
+  'Generating insights in {{language}}...':
+    'Generating insights in {{language}}...',
 };

packages/cli/src/i18n/locales/ja.js

@@ -966,4 +966,10 @@ export default {
     '{{region}} の設定が正常に更新されました。モデルが "{{model}}" に切り替わりました。',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     '{{region}} での認証に成功しました。APIキーとモデル設定が settings.json に保存されました（バックアップ済み）。',
+
+  // ============================================================================
+  // Insight Report - Language Support
+  // ============================================================================
+  'Generating insights in {{language}}...':
+    '{{language}} でインサイトを生成中...',
 };

packages/cli/src/i18n/locales/pt.js

@@ -1453,4 +1453,9 @@ export default {
     'Configuração do {{region}} atualizada com sucesso. Modelo alterado para "{{model}}".',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Autenticado com sucesso com {{region}}. Chave de API e configurações de modelo salvas em settings.json (com backup).',
+  // ===========================================================================
+  // Insight Report - Language Support
+  // ===========================================================================
+  'Generating insights in {{language}}...':
+    'Gerando insights em {{language}}...',
 };

packages/cli/src/i18n/locales/ru.js

@@ -1463,4 +1463,9 @@ export default {
     'Конфигурация {{region}} успешно обновлена. Модель переключена на "{{model}}".',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     'Успешная аутентификация с {{region}}. API-ключ и конфигурации моделей сохранены в settings.json (резервная копия создана).',
+  // ===========================================================================
+  // Insight Report - Language Support
+  // ===========================================================================
+  'Generating insights in {{language}}...':
+    'Генерация инсайтов на {{language}}...',
 };

packages/cli/src/i18n/locales/zh.js

@@ -1281,4 +1281,10 @@ export default {
     '{{region}} 配置更新成功。模型已切换至 "{{model}}"。',
   'Authenticated successfully with {{region}}. API key and model configs saved to settings.json (backed up).':
     '成功通过 {{region}} 认证。API Key 和模型配置已保存至 settings.json（已备份）。',
+
+  // ============================================================================
+  // Insight Report - Language Support
+  // ============================================================================
+  'Generating insights in {{language}}...':
+    '正在生成 {{language}} 的洞察报告...',
 };

packages/cli/src/services/insight/generators/DataProcessor.ts

@@ -34,13 +34,27 @@ import {
   type Config,
   type ChatRecord,
 } from '@qwen-code/qwen-code-core';
+import type { SupportedLanguage } from '../../../i18n/index.js';
 
 const logger = createDebugLogger('DataProcessor');
 
 const CONCURRENCY_LIMIT = 4;
 
+// Language display names for prompts
+const LANGUAGE_DISPLAY_NAMES: Record<SupportedLanguage, string> = {
+  en: 'English',
+  zh: '中文 (Chinese)',
+  ja: '日本語 (Japanese)',
+  de: 'Deutsch (German)',
+  pt: 'Português (Portuguese)',
+  ru: 'Русский (Russian)',
+};
+
 export class DataProcessor {
-  constructor(private config: Config) {}
+  constructor(
+    private config: Config,
+    private language: SupportedLanguage = 'en',
+  ) {}
 
   // Helper function to format date as YYYY-MM-DD
   private formatDate(date: Date): string {
@@ -193,7 +207,8 @@ export class DataProcessor {
     };
 
     const sessionText = this.formatRecordsForAnalysis(records);
-    const prompt = `${getInsightPrompt('analysis')}\n\nSESSION:\n${sessionText}`;
+    const languageInstruction = `\n\nIMPORTANT: Respond in ${LANGUAGE_DISPLAY_NAMES[this.language]}. All output text (brief_summary, underlying_goal, friction_detail) must be written in ${LANGUAGE_DISPLAY_NAMES[this.language]}.`;
+    const prompt = `${getInsightPrompt('analysis')}\n\nSESSION:\n${sessionText}${languageInstruction}`;
 
     try {
       const result = await this.config.getBaseLlmClient().generateJson({
@@ -384,12 +399,13 @@ export class DataProcessor {
     logger.info('Generating qualitative insights...');
 
     const commonData = this.prepareCommonPromptData(metrics, facets);
+    const languageInstruction = `\n\nIMPORTANT: Respond in ${LANGUAGE_DISPLAY_NAMES[this.language]}. All output text must be written in ${LANGUAGE_DISPLAY_NAMES[this.language]}.`;
 
     const generate = async <T>(
       promptTemplate: string,
       schema: Record<string, unknown>,
     ): Promise<T> => {
-      const prompt = `${promptTemplate}\n\n${commonData}`;
+      const prompt = `${promptTemplate}${languageInstruction}\n\n${commonData}`;
       try {
         const result = await this.config.getBaseLlmClient().generateJson({
           model: this.config.getModel(),

packages/cli/src/services/insight/generators/StaticInsightGenerator.ts

@@ -15,16 +15,22 @@ import type {
 } from '../types/StaticInsightTypes.js';
 
 import { createDebugLogger, type Config } from '@qwen-code/qwen-code-core';
+import {
+  getCurrentLanguage,
+  type SupportedLanguage,
+} from '../../../i18n/index.js';
 
 const logger = createDebugLogger('StaticInsightGenerator');
 
 export class StaticInsightGenerator {
   private dataProcessor: DataProcessor;
   private templateRenderer: TemplateRenderer;
+  private language: SupportedLanguage;
 
   constructor(config: Config) {
-    this.dataProcessor = new DataProcessor(config);
-    this.templateRenderer = new TemplateRenderer();
+    this.language = getCurrentLanguage();
+    this.dataProcessor = new DataProcessor(config, this.language);
+    this.templateRenderer = new TemplateRenderer(this.language);
   }
 
   // Ensure the output directory exists

packages/cli/src/services/insight/generators/TemplateRenderer.ts

@@ -6,12 +6,26 @@
 
 import { INSIGHT_JS, INSIGHT_CSS } from '@qwen-code/web-templates';
 import type { InsightData } from '../types/StaticInsightTypes.js';
+import type { SupportedLanguage } from '../../../i18n/index.js';
+
+// Language codes for HTML lang attribute
+const HTML_LANG_CODES: Record<SupportedLanguage, string> = {
+  en: 'en',
+  zh: 'zh-CN',
+  ja: 'ja',
+  de: 'de',
+  pt: 'pt-BR',
+  ru: 'ru',
+};
 
 export class TemplateRenderer {
+  constructor(private language: SupportedLanguage = 'en') {}
+
   // Render the complete HTML file
   async renderInsightHTML(insights: InsightData): Promise<string> {
+    const htmlLang = HTML_LANG_CODES[this.language];
     const html = `<!doctype html>
-<html lang="en">
+<html lang="${htmlLang}">
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
@@ -38,6 +52,7 @@ export class TemplateRenderer {
     <!-- Application Data -->
     <script>
       window.INSIGHT_DATA = ${JSON.stringify(insights)};
+      window.INSIGHT_LANGUAGE = ${JSON.stringify(this.language)};
     </script>
 
     <!-- App Script -->

packages/cli/src/ui/commands/insightCommand.ts

@@ -8,7 +8,11 @@ import type { CommandContext, SlashCommand } from './types.js';
 import { CommandKind } from './types.js';
 import { MessageType } from '../types.js';
 import type { HistoryItemInsightProgress } from '../types.js';
-import { t } from '../../i18n/index.js';
+import {
+  t,
+  getCurrentLanguage,
+  getLanguageNameFromLocale,
+} from '../../i18n/index.js';
 import { join } from 'path';
 import os from 'os';
 import { StaticInsightGenerator } from '../../services/insight/generators/StaticInsightGenerator.js';
@@ -29,6 +33,19 @@ export const insightCommand: SlashCommand = {
     try {
       context.ui.setDebugMessage(t('Generating insights...'));
 
+      // Get current language and display a message
+      const currentLang = getCurrentLanguage();
+      const langName = getLanguageNameFromLocale(currentLang);
+      context.ui.addItem(
+        {
+          type: MessageType.INFO,
+          text: t('Generating insights in {{language}}...', {
+            language: langName,
+          }),
+        },
+        Date.now(),
+      );
+
       const projectsDir = join(os.homedir(), '.qwen', 'projects');
       if (!context.services.config) {
         throw new Error('Config service is not available');

packages/web-templates/src/insight/src/Header.tsx

@@ -1,6 +1,12 @@
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 import React from 'react';
 import type { InsightData } from './types';
+import { t } from './i18n';
+
+// Get current language from window or default to 'en'
+const currentLang =
+  (typeof window !== 'undefined' && window.INSIGHT_LANGUAGE) || 'en';
+const tr = (key: string) => t(key, currentLang);
 
 // Header Component
 export function Header({
@@ -15,11 +21,11 @@ export function Header({
   return (
     <header className="mb-8 space-y-3 text-center">
       <h1 className="text-3xl font-semibold text-slate-900 md:text-4xl">
-        Qwen Code Insights
+        {tr('Qwen Code Insights')}
       </h1>
       <p className="text-sm text-slate-600">
         {totalMessages
-          ? `${totalMessages} messages across ${totalSessions} sessions`
+          ? `${totalMessages} ${tr('messages across')} ${totalSessions} ${tr('sessions')}`
           : 'Your personalized coding journey and patterns'}
         {dateRangeStr && ` | ${dateRangeStr}`}
       </p>
@@ -54,25 +60,25 @@ export function StatsRow({ data }: { data: InsightData }) {
     <div className="stats-row">
       <div className="stat">
         <div className="stat-value">{totalMessages}</div>
-        <div className="stat-label">Messages</div>
+        <div className="stat-label">{tr('Messages')}</div>
       </div>
       <div className="stat">
         <div className="stat-value">
           +{totalLinesAdded}/-{totalLinesRemoved}
         </div>
-        <div className="stat-label">Lines</div>
+        <div className="stat-label">{tr('Lines')}</div>
       </div>
       <div className="stat">
         <div className="stat-value">{totalFiles}</div>
-        <div className="stat-label">Files</div>
+        <div className="stat-label">{tr('Files')}</div>
       </div>
       <div className="stat">
         <div className="stat-value">{daysSpan}</div>
-        <div className="stat-label">Days</div>
+        <div className="stat-label">{tr('Days')}</div>
       </div>
       <div className="stat">
         <div className="stat-value">{msgsPerDay}</div>
-        <div className="stat-label">Msgs/Day</div>
+        <div className="stat-label">{tr('Msgs/Day')}</div>
       </div>
     </div>
   );