Originally Posted by Kir the Wizard

Upper classes in medieval period always had a distinct version of language than that of the commoners, that goes without saying. However, in Warcraft we apparently have a unified human language (with minor distinctions) that everyone understands. Compare to, say, medieval northern France, where practically every region had its own language, each more or less different from the one spoken in Île-de-France, and that's not even talking about Burgundy-Lorraine and Occitania-Aquitaine.