Having been an international student myself (assuming this is the case with her), I was always looking to spend time with local folks to work on my language skills and for the cultural interchange. I assume this is the case with most international students. Due to language barriers, etc, it is sometimes hard to meet people to hang out with, so she may be really receptive to a non-chalant invitation to hang out. You may just want to see if she is interested in hanging out with a (coed) group of your friends as this may be less intimidating than “a date.” Then you can see where it goes from there.