Is the orcish player character not born in Orsinum?
You is born in a plane of oblivion without a soul
No, that's just where you begin the game, Mannimarco having already sacrificed you to Molag Bal. I can't find any confirmation of this online, but I think it's a fairly safe assumption that the player character (as opposed to player character
s, because ZeniMax is sticking to that stupid "You are the Chosen One, the sole hero" thing) is from Cyrodiil, or at least has spent most of his/her life there. That's what all the previous titles have done, after all, probably because it provides an in-universe justification for the fish-out-of-water setup.