The Muscle Booster app is currently available in the following languages: English, French, Spanish, Portuguese, German, Italian, Chinese, Korean, Japanese, and Ukrainian. To change your language, follow the steps below:
1. Open your device’s Settings.
2. Tap System > Languages & input > Languages.
If you can't find System, tap Languages and input > Languages under Personal
3. Tap Add Language, then select the language you want to use.
4. Drag the selected language to the top of the list.