I know that Mortal Kombat is an original, because it was the first martial arts series, made in America. But, the basic storyline IS rooted in Chinese mythology. And, I think that over the years, they have strayed to far away from MK's original roots, making almost everyone Americanized (with the exception of Shang Tsung, and Jade?}). Sub-Zero was originally Chinese, but, somehow, he has formed into an American, a Mexican (Annihilation), and even what looks like an Italian (MK:DA).

Everyone in MK should definitely NOT be Asians, but I do think that they should keep the series grounded in it's roots. And, at least Frost does look to be Asian, in MK:DA.