On Android version of the app, Simple is available in English, Spanish, French, German, Portuguese (Brazil), Italian, Swedish, Turkish, Norwegian, Polish, Dutch, Danish, and Latin American Spanish.
How to choose your preferred language in your phone settings:
Tap your profile icon at the top of the Home tab
On the next screen, tap on Language:
Choose the preferred language:
After that, your app should restart and open with the new language settings.