# Special language values

Language codes are case-sensitive. Use codes from the [speaker language list](../languages#list-speaker-languages) or [translation language list](../languages#list-target-languages) for individual languages, such as `en` or `zh-Hans`.

## mul

Set `speakerLanguage` to `"mul"` to enable [Multilingual mode](../../supported-languages#multilingual-mode), which automatically detects and switches between supported spoken languages.

## ALL

Set `targetLanguages` to `["ALL"]` to select all supported translation languages, if your plan includes unlimited languages. `ALL` is a selection value and is not included in the translation language list.

## Start example

Use these values in the `overrides` object when you [start streaming](../streaming#start-streaming):

```json
{
  "deviceId": "YOUR_DEVICE_ID",
  "overrides": {
    "speakerLanguage": "mul",
    "targetLanguages": ["ALL"]
  }
}
```