ThinkInAIXYZ · zerob13 · May 25, 2026 · May 25, 2026
diff --git a/docs/features/high-priority-i18n-languages/plan.md b/docs/features/high-priority-i18n-languages/plan.md
@@ -0,0 +1,27 @@
+# High Priority i18n Languages Plan
+
+## Scope
+
+Implement the requested locales by following the existing static i18n bundle pattern. The source of truth for required keys is `src/renderer/src/i18n/zh-CN`, with `en-US` as a secondary reference for shorter Latin-script phrasing.
+
+## Implementation
+
+- Create one locale directory per target locale under `src/renderer/src/i18n/`.
+- Reuse the existing locale `index.ts` import/export shape for each new locale.
+- Register new locale modules in `src/renderer/src/i18n/index.ts`.
+- Add language options in `src/renderer/settings/components/DisplaySettings.vue`.
+- Add new locale codes to `ConfigPresenter.getSystemLanguage()`, `ChatLanguage`, and the DeepChat settings Agent tool schema.
+- Extend shared context-menu and error-message translations in `src/shared/i18n.ts`.
+- Keep RTL handling unchanged because all requested locales are LTR.
+
+## Validation
+
+- Run a structural comparison against `zh-CN` for all target locale JSON files.
+- Run `pnpm run format`.
+- Run `pnpm run i18n`.
+- Run `pnpm run lint`.
+
+## Risks
+
+- The largest risk is incomplete or malformed JSON translation files. Mitigation: validate parseability and exact key parity.
+- Some UI strings may become long in German, Polish, Turkish, or Vietnamese. Mitigation: prefer natural but concise desktop UI wording and use English as a length reference where appropriate.
diff --git a/docs/features/high-priority-i18n-languages/spec.md b/docs/features/high-priority-i18n-languages/spec.md
@@ -0,0 +1,29 @@
+# High Priority i18n Languages
+
+## User Stories
+
+- As a DeepChat desktop user in Spain, Germany, Turkey, Indonesia, Malaysia, Italy, Poland, or Vietnam, I can select my language in Display settings and use the app with readable local UI text.
+- As a user whose system locale is one of the supported locales, DeepChat can resolve the matching app language when language is set to System.
+- As an Agent Skills user, product and technical names such as DeepChat, Agent, Skills, MCP, Dify, and model/provider names remain recognizable and are not mistranslated.
+
+## Acceptance Criteria
+
+- Add full renderer i18n bundles for `es-ES`, `de-DE`, `tr-TR`, `id-ID`, `ms-MY`, `it-IT`, `pl-PL`, and `vi-VN`.
+- Each new locale has the same JSON files and key structure as `zh-CN`.
+- New locales are registered in renderer, settings renderer, floating renderer, language selector options, system-locale matching, shared chat settings types, and DeepChat settings Agent tool language schema.
+- Shared native menu and error-label translations support the new locales where the shared i18n helper is used.
+- Translation wording follows the Chinese source meaning, with English used as length/reference for Latin-script languages.
+- Product and domain terms stay untranslated where requested: DeepChat, Agent, Skills, MCP, Dify, model/provider brand names, API, JSON, URL, token, prompt, and similar technical identifiers.
+- `pnpm run format`, `pnpm run i18n`, and `pnpm run lint` pass.
+
+## Non-Goals
+
+- No UI layout redesign.
+- No new runtime language-loading architecture.
+- No locale-specific date, number, or plural-rule behavior beyond existing vue-i18n support unless needed by validation.
+
+## Constraints
+
+- Preserve existing keys, placeholders, interpolation variables, markdown, and JSON syntax.
+- Keep translations clear for desktop application users; avoid jargon-heavy or literal machine-style phrasing.
+- Resolve implementation without `[NEEDS CLARIFICATION]` markers.
diff --git a/docs/features/high-priority-i18n-languages/tasks.md b/docs/features/high-priority-i18n-languages/tasks.md
@@ -0,0 +1,8 @@
+# High Priority i18n Languages Tasks
+
+- [x] Create SDD artifacts for the i18n expansion.
+- [x] Add translated locale bundles for `es-ES`, `de-DE`, `tr-TR`, `id-ID`, `ms-MY`, `it-IT`, `pl-PL`, and `vi-VN`.
+- [x] Register all new locales in renderer and main-process language support.
+- [x] Extend shared menu/error translations for the new locale codes.
+- [x] Validate locale key parity and JSON parseability.
+- [x] Run `pnpm run format`, `pnpm run i18n`, and `pnpm run lint`.
diff --git a/src/main/presenter/configPresenter/index.ts b/src/main/presenter/configPresenter/index.ts
@@ -1757,7 +1757,15 @@ export class ConfigPresenter implements IConfigPresenter {
       'fa-IR',
       'pt-BR',
       'da-DK',
-      'he-IL'
+      'he-IL',
+      'es-ES',
+      'de-DE',
+      'tr-TR',
+      'id-ID',
+      'ms-MY',
+      'it-IT',
+      'pl-PL',
+      'vi-VN'
     ]
 
     // Exact match

diff --git a/src/main/presenter/toolPresenter/agentTools/chatSettingsTools.ts b/src/main/presenter/toolPresenter/agentTools/chatSettingsTools.ts
@@ -35,7 +35,15 @@ const SUPPORTED_LANGUAGES = [
   'fa-IR',
   'pt-BR',
   'da-DK',
-  'he-IL'
+  'he-IL',
+  'es-ES',
+  'de-DE',
+  'tr-TR',
+  'id-ID',
+  'ms-MY',
+  'it-IT',
+  'pl-PL',
+  'vi-VN'
 ] as const satisfies readonly ChatLanguage[]
 
 const SUPPORTED_THEMES = ['dark', 'light', 'system'] as const

diff --git a/src/renderer/settings/components/DisplaySettings.vue b/src/renderer/settings/components/DisplaySettings.vue
@@ -351,7 +351,15 @@ const languageOptions = [
   { value: 'fa-IR', label: 'فارسی (ایران)' },
   { value: 'pt-BR', label: 'Português (Brasil)' },
   { value: 'da-DK', label: 'Dansk' },
-  { value: 'he-IL', label: 'עברית (ישראל)' }
+  { value: 'he-IL', label: 'עברית (ישראל)' },
+  { value: 'es-ES', label: 'Español (España)' },
+  { value: 'de-DE', label: 'Deutsch (Deutschland)' },
+  { value: 'tr-TR', label: 'Türkçe' },
+  { value: 'id-ID', label: 'Bahasa Indonesia' },
+  { value: 'ms-MY', label: 'Bahasa Melayu' },
+  { value: 'it-IT', label: 'Italiano' },
+  { value: 'pl-PL', label: 'Polski' },
+  { value: 'vi-VN', label: 'Tiếng Việt' }
 ]
 
 watch(selectedLanguage, async (newValue) => {

diff --git a/src/renderer/src/i18n/de-DE/about.json b/src/renderer/src/i18n/de-DE/about.json
@@ -0,0 +1,23 @@
+{
+  "title": "DeepChat",
+  "description": "DeepChat ist ein plattformübergreifender KI-Client, der KI für mehr Menschen einfach zugänglich macht.",
+  "website": "Unsere Website besuchen",
+  "disclaimerButton": "Haftungsausschluss",
+  "feedbackButton": "Feedback",
+  "disclaimerTitle": "Nutzungsbedingungen",
+  "checkUpdateButton": "Nach Updates suchen",
+  "mockUpdateButton": "Heruntergeladenes Update simulieren",
+  "clearMockUpdateButton": "Simuliertes Update löschen",
+  "mockOnboardingButton": "Ersteinrichtungsassistent simulieren",
+  "updateChannel": "Update-Kanal",
+  "stableChannel": "Stabil",
+  "betaChannel": "Beta",
+  "deviceInfo": {
+    "title": "Geräteinformationen",
+    "platform": "Plattform",
+    "arch": "Architektur",
+    "cpuModel": "CPU-Modell",
+    "totalMemory": "Gesamtspeicher",
+    "osVersion": "Systemversion"
+  }
+}
diff --git a/src/renderer/src/i18n/de-DE/artifacts.json b/src/renderer/src/i18n/de-DE/artifacts.json
@@ -0,0 +1,52 @@
+{
+  "clickToOpen": "Zum Öffnen klicken",
+  "codeSnippet": "Codeausschnitt",
+  "function": "Funktion",
+  "class": "Klasse",
+  "reactComponent": "React-Komponente",
+  "moduleImport": "Modulimport",
+  "variableDefinition": "{name} Variablendefinition",
+  "markdownDocument": "Markdown-Dokument",
+  "htmlDocument": "HTML-Dokument",
+  "svgImage": "SVG-Bild",
+  "flowchart": "Flussdiagramm",
+  "sequenceDiagram": "Sequenzdiagramm",
+  "classDiagram": "Klassendiagramm",
+  "stateDiagram": "Zustandsdiagramm",
+  "erDiagram": "ER-Diagramm",
+  "ganttChart": "Gantt-Diagramm",
+  "pieChart": "Kreisdiagramm",
+  "mermaidDiagram": "Mermaid-Diagramm",
+  "flowchartOf": "Flussdiagramm von {name}",
+  "sequenceDiagramBetween": "Sequenzdiagramm zwischen {participants}",
+  "classDiagramOf": "Klassendiagramm von {name}",
+  "stateDiagramOf": "Zustandsdiagramm von {name}",
+  "erDiagramOf": "ER-Diagramm von {name}",
+  "pieChartOf": "Kreisdiagramm von {name}",
+  "unknownDocument": "Unbekanntes Dokument",
+  "preview": "Vorschau",
+  "code": "Code",
+  "export": "Exportieren",
+  "htmlPreviewTitle": "HTML-Vorschau",
+  "svgPreviewTitle": "SVG-Vorschau",
+  "copy": "Kopieren",
+  "copyAsImage": "Als Bild kopieren",
+  "copyImageSuccessDesc": "Bild wurde in die Zwischenablage kopiert",
+  "copyImageFailedDesc": "Bild konnte nicht in die Zwischenablage kopiert werden",
+  "copySuccess": "Kopiert",
+  "copySuccessDesc": "Inhalt wurde in die Zwischenablage kopiert",
+  "copyFailed": "Kopieren fehlgeschlagen",
+  "copyFailedDesc": "Inhalt konnte nicht in die Zwischenablage kopiert werden",
+  "desktop": "Desktop",
+  "tablet": "Tablet",
+  "mobile": "Mobil",
+  "responsive": "Responsiv",
+  "width": "Breite",
+  "height": "Höhe",
+  "sanitizingSvg": "SVG-Inhalt wird bereinigt...",
+  "svgSanitizationFailed": "SVG-Inhalt hat die Sicherheitsprüfung nicht bestanden",
+  "noSvgContent": "Kein SVG-Inhalt verfügbar",
+  "mermaid": {
+    "renderError": "Rendern fehlgeschlagen: {message}"
+  }
+}