Mobile Device:

To change the language on your mobile device, go to your device settings. The game's language will automatically update. The following languages are currently available: English, German, French, Italian, Japanese, Korean, Spanish and Simplified Chinese. If the language of your device isn't supported, the game will default to English.

Personal Computer:

For this on your PC, navigate to "Region and Language" in your settings. Choose a region with your preferred language from the list of available options. The game's language will automatically change when you re-enter it.  The following languages are currently available: English, German, French, Italian, Japanese, Korean, Spanish and Simplified Chinese.  If your desired language isn't supported, the game will use English as the default.