I'm leaning toward using the actual names, translated into English. It will mean more to your players, anyway, and it will be easier to establish an atmosphere.
I mean, if you tell me the guy over there in jet black armor is named "Zxjnuy moaBLuzk," I'm probably not going to attach any emotional or cognitive value to it. However, if you tell me his name means (or is) "Vladimir, Drinker of Heartsblood," I may have more of an "aha" moment.