Open source Duolingo alternative?
I would like to learn a couple of languages (polish and Japanese - I already learned Spanish to a decent degree) but it seems like every solution is closed source.
I would use books but listening (and speaking) are very important and books won't help with those.
What would you guys recommend?
Have you tried this? Learning a language by listening to 5-10 minutes each day seems too good to be true but I might give it a shot 😄