Lots of Spanish linguistics research. Did you know that English is one of the few analytic languages while Spanish is synthetic? And that Spanish is syllable-timed while English is stress-timed?
This is making the two Spanish classes I'm taking this summer harder. The synthetic part means Spanish has 20 bazillion verb conjugations and the syllable-timing means that the language is spoken in a totally different rhythm than English. I don't know how these two very different languages coexist on this continent. If you're looking for an easy language to learn, German might be easier since it's also stress-timed, but it's really hard to find another language that isn't synthetic with other huge problems. For example, Mandarin Chinese is analytic, but good luck writing that thing.
Anyway, I finished my research, so now I know why my Spanish classes are so hard. 60% of Spanish meaning is in its verbs. You have been warned.