Thank you so much! I will definitely add those ideas to the roadmap in the README (pointing out this comment).

I believe the spaced repetition feature must be prioritized because that's the most important thing in this app. I mean, what's the purpose of seeing the words over and over again if I already have confidence with them?

For the pronunciation feature, I had similar work before and there are great open source tools and libraries we can build upon that analyze your pronunciation and spot where you made mistakes. We can use open source TTS libraries to pronounce the correct version.

I also would definitely want to see audio questions in exercises similar to Duolingo, and it would be great to work on those features.

I am learning Turkish so I built something like that for me. You can highlight any word online and it will translate colloquially so you can actually use it irl.

It also has audio and pronunciation. It is around the halfway mark in the demo.

demo: https://imgur.com/a/full-demo-so-far-O2fzBJn

Harika görünüyor! Are you planning to share it open source?

Not: Bu benim en sevdiğim şarkılardan biridir!! (it's one my fav songs)

Teşekkür ederim! Evet, inş.(Thanks. Yes I will opensource it.)

Ben de aşık ya! (Mine too!)