It's clear from your response you are not US Native American tribal indian (we do NOT call ourselves "redman", if you knew the history of that term you would not use it, proof enough that you are a liar), and judging from the content of your post you are simply another hispanic/latino/meztiso/Mexican indio/Mexican, Central American or South American who has indigenous roots in Mexico, Central or South America, lives now in the USA, and has chewed up enough of the MEChA lies and raza garbage, choked on it and knows nothing what-so-ever about the true history of this continent.
The aztec NEVER lived north of the current US/Mexico border, and anyone with any sense knows that "aztlan" is not a "language" as you profess, but it is, as confirmed by leaders of the MEChA organization (which created "aztlan" on a California college campus in 1969- well documented), exactly what they stated, in the public media, that "aztlan is an IMAGINARY place, created to give chicanos (first generation born US citizens of Mexican heritage) a sense of belonging", that they "never intended chicanos or any Mexicans to actually BELIEVE that aztlan ever existed", it is, in fact a fairy tale, it should be prefaced with "once upon a time", and anyone who believes that any such place as "aztlan" existed on USA soil is uneducated and a fool.
The premise that the aztec were distant "cousins" of the Ute tribe (which I assume is where you got your reference to 'aztlan" being a "language") is based on a theory (opinion) by one WHITE MAN named Wissler, a linguist from the US northwest who executed his "study" on the language of the native tribal indians of the North American continent in the early 1900s, without ever traveling to the US southwest himself. At the time Wissler wrote his thesis (which unfortunately has been grasped on and touted as FACT, although unproven) the tribes of the US southwest had been decimated, the Spanish had invaded from Europe, brought Mexican indios and meztiso into the lands of the US native indian tribes, and the languages of the tribes had been slurried, just as the language of English has been altered by the addition of German, French, Irish, Italian and Spanish speaking peoples in this nation. Wisslers theory (opinon) is seriously flawed.
In any case the Aztec would be nothing more than distant cousins of the Ute, at best.
There was never any massive "aztec" empire anywhere on what is the USA today, if so remnants and archeological remains would be present, neither of which exist.
If anything the aztec, if related to the Ute, are in fact distant counsins of the great Ute tribe, and are the very people whose tale is an old Ute story handed down for generations.

The story goes like this:
Two families of the tribe (Ute) were discovered to be killing their own people (murderng Utes) and shared eating the flesh (cannibalizing). This was forbidden in the Ute, the famiies were driven away in shame, they fled to the south, stones rained on their heads. They were never seen nor heard of again.
It's quite possible that the "aztec" were in reality those cannibalistic Ute who ran all the way to central Mexico to continue murdering and eating their own flesh and blood.
You certainly know the story, if you are, as you say, US native American tribal indian.