Louve utilise witches.town. Vous pouvez læ suivre et interagir si vous possédez un compte quelque part dans le "fediverse".
@Selenian I found this:
https://www.thoughtco.com/japanese-4133062
And there are several resources listed here:
https://www.quora.com/Is-there-a-website-like-Duolingo-to-learn-Japanese
But I never got/took the time to check them out, I don't know what they're worth...