## Feature Request

Please add i18n / language switching support for the LiteLLM Dashboard, especially Chinese (`zh-CN`).

## Problem

LiteLLM has Chinese documentation mirrors, but the Admin Dashboard UI appears to be English-only. I could not find:

- A language switcher in the Dashboard - An official Chinese language pack/plugin - i18n configuration for the Dashboard - Related merged PRs for Dashboard localization

For Chinese-speaking users and internal enterprise users, browser translation is usable but not ideal for daily operations.

## Expected Solution

Add official i18n support to the Dashboard, for example:

- Add a language selector in the Dashboard - Support `en` and `zh-CN` initially - Extract UI strings into translation files - Document how self-hosted users can configure the default language

## Alternatives Considered

- Browser auto-translation - Forking and manually translating the Dashboard frontend

These workarounds are inconvenient to maintain and can produce inconsistent translations.

## Additional Context

Dashboard source appears to be under:

```text ui/litellm-dashboard ```

I checked the Dashboard frontend dependencies and did not see common i18n libra…