I'm mildly interested in this. Are we allowed to have Asian nations? Namely China or Japan?Sure you do.
The only problem is that most action would be around Europe and the colonies.
Ottoman, German and Portuguese players are sorely needed for this game. These nations currently exist as NPCs but competing against non-players isn't so much fun.
So yeah, I'm sure Vahir would allow you to make AU Japan or China.
Without other eastern faction around it's going to be difficult to interact with players, though.
By no means I wish to discourage you. I'm just being frank.
Maybe if your China does begin colonizing centuries before Europe does and you'll have disputes with Portugese, English and Spanish-French, then we can solve the issue with the lack of interaction.