I occasionally do Duolingo for a little Japanese practice but I don't think it does a good job there either. The Japanese learning experience seemed far worse

I occasionally do Duolingo for a little Japanese practice but I don't think it does a good job there either. The Japanese learning experience seemed far worse than the Spanish experience. Maybe it's because I knew more Japanese and passed in to the higher levels, or because I'm more aware of the errors, but I think it's more due to the fact that Japanese is further from English and Duolingo wasn't designed around it. It is missing tools around Kanji and regularly "speaks" using the wrong reading (since characters can be pronounced differently in different contexts). There are no tools around learning characters or grammar, no short stories or other supplemental exercises, etc. The language pack feels like a bit of an afterthought rather than a core offering. The translations already aren't great, and I can't imagine polluting it with some unvetted AI translations would help at all.