I would say the answer is "Yes, but..." It won't teach it on its own, but it can help you along with other methods of practice. I think even classes at school

I would say the answer is "Yes, but..." It won't teach it on its own, but it can help you along with other methods of practice. I think even classes at school aren't enough on their own to teach you a language. You need other things to help you really learn the language.