I never watch foreign language films, as I wouldn't be able to follow what's going on. I will sometimes watch films where part of the dialog is foreign, with subtitles, like war movies. I watched the mini series Shogun many years ago, and part of that was in Japanese, and with subtitles. As long as most of it is in my own language, then I can follow the story.
There was one exception I did make one time. It was late at night, and for some reason I started watching a spanish language movie that had just come on. It was a period piece taking place several hundred years ago in either south or central America. The king had a daughter that had to marry well. There was a nice prince or noble man that loved her and whom she loved. There was an evil high priest or nobleman who wanted her and the kingdom, so he was plotting against the boyfriend. I was able to follow a lot of the general gist of it well enough, although I don't speak spanish, but I got too tired, so I was unable to stay up long enough to see the whole movie. I would have liked to see the whole movie, as I got interested in the characters. The cast and sets were good, and it seemed to be nicely done. When the acting is good I can sometimes stand problems in other aspects of a movie, like in this case not being able to understand the language. 