It's kind of sad that a fun little game would have to enforce awful stereotypes about ethnicities/races: all black Africans are dark & naked or dreadlocked / all Arabs have guns / all Asians are Mandarin/Fu Manchu-looking... If your game doesn't support these kinds of stereotypes in an intelligent way, why do it? (You're not commenting on stereotype but merely reinforcing it).
This seems meaningful, but I might be reading something out of nothing. Shallow, but economical, considering the devtime (hours?). If you liked this, try this game: http://gambit.mit.edu/yetoneword (made at my game lab).