That's a bit strange, though I suppose not every world would have an equivalent. A fair amount of people here are from very similar worlds and would recognize the same country names, so I admittedly directed the question more towards them.

However, that's actually a very good idea, given that we don't actually have common names for any of them yet. People would be able to recognize them on sight, of course, so it would be better than... well, anything else at the moment.