I second javiskefka. Typically, Korean-language classes are given in 99% Korean and 1% English. There are many speakers of other languages that attend those classes. In my particular class, it was the standard textbook class makeup - 1 from France, 1 from Singapore, 1 from Hong Kong, 3 from Japan, etc...I can say that the non-U.S. students made the class that much more interesting. I had to rely on my Korean to communicate which for me was a lot of fun - but I have to admit, I did cheat and use English during breaktime
As for the food, the meals that are provided are usually very simple Korean staples like 김치찌게 and other stews. They generally aren't very spicy.
I've noticed that Koreans are acute to most foreigners' sensitivity to spiciness and will deliberately make a normal dish less spicy even without requesting it. It actually frustrated me because I had to spell it out each time I ordered that I indeed wanted
it spicy as I like spicy foods.
Rest assured, there are many college students that speak Spanish who want to practice it with a native speaker. If you were to go to Korea and attend a university program, as long as you would want to do language exchange, you'd be quite popular in my opinion.