[quote=WittyReference]
Damn. This is going to sound dumb, but I've never considered in any RP that different cultures might have different names for their world; just always a common name in the most popular language.
[/quote]

That makes an amount of sense in nation roleplays with interconnected, fully explored worlds, but when this starts off we won't even know that other nations exist. It'd be silly for there to be a common name.