It depends. If you're trying to learn a new language, then yes, watching movies in that language can be helpful. But if you just want to relax and watch a movie, maybe it's not so useful.
这取决于情况。如果你想学习一门新语言,那么是的,用那种语言看电影会有帮助。但如果你只是想放松一下看电影,也许就没有那么有用了。