Cuāuhtemōc
Banned
Bumping this to keep it as an idea. An explorer as an all-and-out king is an interesting concept: I wonder if you could do the same to Colombus, or John Cabot, or perhaps even some of the more priestly explorers... Setting up oneself as a pagan-style Pope or native God-King, perhaps?
Doubt it. Christianity, a syncretic form of Christianity combining Catholicism with the local religions of the native Mesoamericans, is what I see is going to be imposed by King Cortes. Though the Nahuatl language might end up surviving since it is spoken by the overwhelming majority of the population. Spanish might end up just being spoken by the court.