No, just look at the way the alignments are treated, the religion of the default world, the technological level of the default world etc. It seems pretty Mesopatamian to me, though the cultural trappings are different. Secondly, I just don't see why everybody would talk like that. Even within a certain nation like America there is a huge variance in accents and culture, so why assume everything is medieval and talks all "tea and crumpets"? Because its easy?