> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getreditus.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Languages

> Display the Reditus referral program widget in your user's language.

The in-app referral widget can be displayed in several languages. By default the widget is shown in **English**. You can select a different language per user by passing the `lang` option when you load the widget.

## Supported Languages

| Code | Language          |
| ---- | ----------------- |
| `en` | English (default) |
| `fr` | French            |
| `es` | Spanish           |
| `de` | German            |
| `pt` | Portuguese        |
| `it` | Italian           |
| `pl` | Polish            |

## Setting the Language

Pass the `lang` option to `gr("loadReferralWidget", ...)` with one of the supported codes:

```javascript Javascript theme={null}
window.gr("loadReferralWidget", {
  product_id: PRODUCT_ID,
  auth_token: authToken,
  lang: "de", // Display the widget in German
  user_details: {
    email: "john@example.com",
    first_name: "John",
    last_name: "Doe",
    company_id: "1as2-3df4-5fg6-7hj8",
    company_name: "Acme",
  },
});
```

Set `lang` to the language your user has selected in your application. If you load the widget again with a different `lang`, the new language takes effect the next time the widget is shown.

## How It Works

* **English is the default.** If you omit `lang`, or pass a value that is not supported, the widget falls back to English.
* **Region variants are accepted.** Values such as `fr-CA` or `pt-BR` are matched to their base language (`fr`, `pt`). If the base language is not supported, the widget falls back to English.
* **English is always available instantly.** English ships with the widget. The other languages are loaded on demand the first time they are needed, so there is no extra cost for users on the default language.
* **Safe fallback.** If a translation cannot be loaded for any reason, the widget continues to work and shows English instead.

## What Gets Translated

The `lang` option translates the widget's own interface: tab names, buttons, labels, instructions, and status messages.

Content that comes from your Reditus configuration is shown as you entered it, and is **not** translated automatically. This includes:

* Your referral program name.
* Custom reward descriptions.
* Your Terms and Conditions.
* Monetary amounts and currencies.

<Note>
  If you need this configured content in another language, set it in the
  language you want your users to see in your Reditus referral program
  settings.
</Note>

## Next steps

Continue to [Authenticating the User](./authentication) to learn how to generate the `auth_token` (JWT), or [Showing the Widget Modal](./show) to display the referral interface.