I think it depends on what you plan to do with your degree and where you ideally want to live. I would spend some time really thinking about that!
If you think the majority of your work will be in, say, Los Angeles, I would say Spanish. If you plan to work in Paris, Toyko, or Shanghai, well, then it's a given.
But more importantly, you should study a language you enjoy. I just helped a designer with some manufacturing in Vietnam and you know what? I had a translator!