No advice about the schools, but I lived in PR for 3 years and I LOVED it and MISS it terribly!!! I didn't know spanish when I moved there but became fluent in about 6 months to a year. However.... even now, I would not enroll in a spanish academic program. There are some things that I must do in my native language - learning is one of them.

I seriously used to get headaches just from trying to follow the TV for more than 15 minutes when I was first learning!
I'm hoping that my bilingualism will be an asset that sets me apart from the majority when it comes time to apply for RN jobs!
Good luck... where did you decide to apply?