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# Languages
TREK ships with translations for 27 languages, the [Help Center](Help-Center) guides included. You can change your language at any time without logging out.
## Supported languages
| Code | Language |
|------|----------|
| `de` | Deutsch |
| `en` | English |
| `es` | Español |
| `et` | Eesti |
| `fr` | Français |
| `hu` | Magyar |
| `nl` | Nederlands |
| `br` | Português (Brasil) |
| `cs` | Česky |
| `sk` | Slovenčina |
| `pl` | Polski |
| `ru` | Русский |
| `zh` | 简体中文 |
| `zh-TW` | 繁體中文 |
| `it` | Italiano |
| `tr` | Türkçe |
| `ar` | العربية |
| `az` | Azərbaycanca |
| `id` | Bahasa Indonesia |
| `ja` | 日本語 |
| `ko` | 한국어 |
| `th` | ไทย |
| `uk` | Українська |
| `gr` | Ελληνικά |
| `sv` | Svenska |
| `vi` | Tiếng Việt |
| `ca` | Català |
## Place names in another language
Place search, suggestions, place details and addresses follow the app language by default. **Settings → General → Language & region → Place names** lets them answer in another language while the interface stays in yours, for example English place names in a German app. Where a place has no name in the chosen language, its local name is shown. See [Display-Settings](Display-Settings#place-names).
## RTL support
Arabic (`ar`) uses a right-to-left layout. All other languages use left-to-right.
## How language is detected
TREK resolves the display language in this order:
1. **User preference** — the language saved to your account (set in Settings → General).
2. **Browser language** — `navigator.languages` (and `navigator.language`) reported by your browser.
3. **Server default** — the `DEFAULT_LANGUAGE` environment variable set by the admin.
4. **Fallback** — English (`en`).
## Where the language picker appears
- **Login / Register page** — before you are signed in.
- **Settings → General** — after you are signed in. See [Display-Settings](Display-Settings).
- **Public share pages** — trip share links.
- **Public journey pages** — public-facing journey views.
> **Admin:** The `DEFAULT_LANGUAGE` environment variable sets the fallback language shown on the login page and for unauthenticated users. See [Environment-Variables](Environment-Variables).
## See also
- [Display-Settings](Display-Settings)
- [Environment-Variables](Environment-Variables)
- [User-Settings](User-Settings)