Localization

The product ships with seven UI and export locales: English, Russian, German, Spanish, French, Simplified Chinese, and Arabic. Frontend leaf-key parity is enforced at 925 keys per locale (matching en); backend export strings are 235 keys per locale.

Shipped locales

Locale	Coverage	Notes
en	full	Default UI and export language.
ru	full	Full UI and deterministic report support.
de	full	Full UI and export locale with regional fallback support.
es	full	Full UI and export locale with regional fallback support.
fr	full	Full UI and export locale with regional fallback support.
zh	full	Simplified Chinese UI and export locale.
ar	full + RTL	Arabic UI and export locale; switching to ar flips document.documentElement.dir to rtl and the layout uses inset-inline-* / margin-inline-* / border-inline-* logical CSS properties.

Runtime behavior

• The header language switcher (7 buttons, aria-pressed) persists the selected locale in localStorage.
• Query-string overrides such as ?lang=de take precedence over browser defaults.
• Backend export endpoints honor Accept-Language.
• Regional tags fall back to the primary locale: de-AT → de, es-MX → es, en-GB → en, zh-TW → zh, ar-EG → ar.
• Unsupported locales fall back to English.
• Locale JSONs are lazy-loaded from app/frontend/public/locales/ via i18next-http-backend; only the active locale is fetched at startup, the rest on-demand at switch.

Example

curl -X POST http://127.0.0.1:8008/api/v1/export/markdown \
  -H "Accept-Language: de" \
  -H "Content-Type: application/json" \
  -d @docs/demo/sample-report.json