Atupa: QuatribaRap
You don't really need to know a particular language in order to enjoy music. As trite as it sounds, music is a universal language. It communicates through emotions and sounds.
Atupa's sound is one such example of music transcending the barriers of language. Even if you don't understand a shred of what the boys are rapping about, you're still in for a good listen.
QuatribaRap was released last July 2012 and it's currently offered absolutely free over at the group's BandCamp page.