Anecdotally, yes. I have learned a lot of languages, and the method that worked best for me was to read books in which I was interested and to watch movies spo

Anecdotally, yes. I have learned a lot of languages, and the method that worked best for me was to read books in which I was interested and to watch movies spoken in that language that were interesting, with the periodic help of a grammar and a dictionary. Traditional language handbooks or other simplified sources have not been as useful as being exposed to a great amount of non-simplified language, which I reread and rewatched until I understood it perfectly. It was essential for the books that I read and the movies that I watched to be good enough, so that I really wanted to understand what was written or said. Even in the beginning, I did not use the grammar and the dictionary very frequently, especially with movies, but I attempted to guess the meaning of the unknown words and move forward with the reading or watching, without interruptions. Only later I confirmed or rejected my guesses with the grammar and dictionary.