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?
The US Foreign Services Institute releases their learning materials, so if you’re okay with a lack of structure I hear they can be very useful, including both reading and listening.
It can be accessed on several different sites. Here’s one that came up, but you can find a few more with some searching: https://www.livelingua.com/fsi/
Holy shit this is an excellent resource. Thanks a lot
Edit never mind just looked at the pdf for my native language and it’s full of errors for the most basic shit.