I really, really like the 'every culture has its own name for the place' idea expressed earlier by KDR_11k.
As noted it is probably the most realistic, however how realistic is any given game? And having twenty seven names for a place is probably a marketers nightmare for the studio.
Anyway, with that in mind... a way to address that problem springs to mind...
It might be possible to have the place, possibly the 'first' place that breaks away and is revealed as the first or tutorial level, and is referred to by the same name as the characters themselves referred to it. Simply as 'Skyward'
Which depending on culture could be pronounced as 'Ski-var-ah', or 'Ssska-wverd' or ... well in different ways. Not intending to be funny or insulting to other cultures, but it could be a single name with branched or mutilated names, or even names in the language of the other peoples... (Skyward in other languages...)
Such as ... Hacia El Cielo, in Spanish... or Enohour Samir in Arabic, or Spre Cer, in Romanian... i guess you get the idea.
[ Sorry, couldn't get Arabic characters to take in the chat window,
]
Anyway... just my opinion, and it might make for a variety of names and be more realistic in that way, and give interesting individual names not only from a 'cultural' point of view inside the game, but what if it was referred to in the same way outside the game? By the players themselves? From all the variety of countries they come from?
Such as : "I really like that new Arcen 'Eg Fele' ('Skyward' from Hungarian player) game!!
Just a crazy thought! But it might be a little bit cool!
-Teal