A language learning app called lexaway. Premise is people can learn like LLMs learned - word prediction. I use tatoeba, an online sentence pairing thing, and it's nice well it's worked for me. I hate the green bird fyi so it's free and open source.
A free and open source language learning app in the form of a pixel-art game - it currently supports 6 languages. It's something I feel Duolingo should've been but I've seen them drift further and further from the point. The app is fully offline and there's no accounts or signup
https://apps.apple.com/us/app/lexaway/id6761870125