Maybe its the enthusiastic indi-developer in me, but it feels like this is an opportunity for someone to make a better version of Anki specific to language learning. I see it as a hybrid of Babbel + Anki.

I see some individuals creating LLM generations of the cards which is definitely helpful at times, but also a double edge sword when it comes to learning. But I don't see anything taking in the users voice as an input which would be immensely beneficial