> For the complete documentation index, see [llms.txt](https://docs.trendswap.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trendswap.app/i18n/multilingual-support.md).

# multilingual support

Viral memes are an international language. TrendSwap is built from the ground up to support global creators across North America, Latin America, Europe, East Asia, and Greater China.

***

## Supported Locales Matrix

| Locale Code | Language Name      | Native Display | Region Focus                                      |
| ----------- | ------------------ | -------------- | ------------------------------------------------- |
| `en`        | English            | English        | North America, United Kingdom, Australia, Global  |
| `es`        | Spanish            | Español        | Spain, Mexico, Colombia, Argentina, Latin America |
| `ja`        | Japanese           | 日本語            | Japan & Asian creators                            |
| `zh`        | Simplified Chinese | 简体中文           | Greater China, Singapore, Global Chinese diaspora |

***

## Internationalization Implementation

{% stepper %}
{% step %}

### Zero-Flicker SSR Strategy (`cookie` + `baseLocale`)

Our TanStack Start and Cloudflare Workers SSR engine parses the `PARAGLIDE_LOCALE` cookie on the incoming HTTP request. The initial HTML document is rendered directly in the user's preferred language on the edge, eliminating layout shift and hydration flicker.
{% endstep %}

{% step %}

### Comprehensive Surface Localization

Unlike basic tools that only translate the marketing hero section, TrendSwap localizes every layer of the user journey:

* **Interactive Control Deck**: Upload dropzones, framing selectors, resolution pills, role alternation toggles.
* **Rendering Progress State Machine**: Step-by-step progress indicators (*"Aligning facial landmarks"*, *"Neural frame rendering"*, *"Muxing audio track"*).
* **Billing & Account Management**: Credit ledgers, transaction types, discount wheels, and receipts.
* **SEO & Search Engines**: Bidirectional `<link rel="alternate" hreflang="...">` tags on all routes, complete with localized sitemaps.
  {% endstep %}

{% step %}

### Language Selector

Users can change their display language at any time using the language selector located in the header navigation or footer bar. Switching sets a persistent cookie valid for 365 days.
{% endstep %}
{% endstepper %}


---

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