There are two minor towns, so far that i've found, entirely populated by Orcs (check near Riften.) Theres an elven district in another city. Many travelers and traders are non-nord races, coming from they're homelands. Meanwhile, all the long-standing towns, farms and mills that SHOULD be populated by Nords, are in fact populated by Nords. Everything seems to be adding up VERY well, in my humble opinion. No complaints