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?
I am using it for the French course right now and can’t recommend it enough. It’s very well done and makes a tonne of sense to me. Can’t hurt to try, I say.