I've been working on a Thai language learning application(https://thaicopilot.com/) for months now, so I would love to get some feedback from the community. I plan to expand to other languages, but the thought process for now is to get it right for one language and scale up the repeatable efforts for all the others.
If you want to see a video of the app without sign up https://thaicopilot.com/how-it-works