Add supported interface languages ​​to `README.md` and to the game description on F-Droid

[Korb]

There is currently no mention of supported languages, and one can only assume that the app is only available in English.

[Sesu8642]

Correct. Is this just a question or a feature request for adding translations?

[Sesu8642]

Ah, I didn't read the title ;D