I realize lots of people have learned languages by watching movies in the target language and reading subtitles in their native language, but I have found that to be highly difficult. I guess everyone is different, but given that the vast majority of people who read something while listening to something else will either comprehend something from one and nothing from the other, or worst case, get nothing from either, it seems likely that doing so to learn a language is not optimum.
I could perhaps see this method as more effective in cases where the 2 languages are similar enough that there is some "lining up" between what you read and hear, but where the words are completely dissimilar and even sentence structure is completely different, I just don't see it as any better than a brute force method of learning.