# Locale preference
<a name="sdk-locale-support"></a>

 In Amazon GameLift Streams, you can set the locale preference per stream. This is useful if your application retrieves location-specific information from the end user's operating system, such as time or currency. 

 Amazon GameLift Streams supports the following languages: 


| Value | Description | 
| --- | --- | 
| `en_US` | U.S. English (default) | 
| `ja_jp.UTF-8` | Japanese | 

 **To change the locale setting** 

 When you call [StartStreamSession](https://docs.aws.amazon.com/gameliftstreams/latest/apireference/API_StartStreamSession.html) using the Amazon GameLift Streams API, add `LANG={{<language>}}` to your `AdditionalEnvironmentVariables`. Since locale preference is unique per user, you set this at the stream-session level. If you don't set this, the stream uses U.S. English by default. 

**Example**  

```
aws gameliftstreams start-stream-session \
   --identifier {{arn:aws:gameliftstreams:us-west-2:123456789012:streamgroup/1AB2C3De4}} \
   --protocol {{WebRTC}} \
   --signal-request "{{[webrtc-ice-offer json string]}}" \
   --user-id {{xnshijwh}} \            
   --additional-environment-variables '{"LANG": "{{ja_JP.UTF-8}}"}'
```