I would actually do it vice versa as c-rpg uses Calradia realm and most of these armours don't fit actual European armours (especially native models). So I vote to change all Arabian to Sarranid, Mongolian to Khergit etc. just to underline that it's not about realism.
That's because makers of those items want them to be called like that. Native items are made by TW and should stay as they are. I wish Zimke didn't give real life names to his work, but that is his decision and we should respect it.