I made a PHP-based one a while ago before Duolingo offered Swahili. It probably needs a little upgrading, ha. A cool project and you can do it for most things. Oh plus it’s raw PHP so snappy as heck you youngins. https://github.com/ryanchausse/githeri

I’ve messed with Spanish, Italian, German, and Swahili. It is not my opinion that these languages are more difficult to learn than English, even with the reduced pronouns and gendered nouns.

I think you’re doing great.