A language family consists of two or more tongues that are distinct and yet related historically in that they are all descended from a single ancestor language, either known or assumed to have existed.
The languages of the Tanoan branch of Aztec-Tanoan are spoken in the Rio Grande valley, New Mexico, and Arizona.
At present, the aboriginal languages of the Western Hemisphere are gradually being replaced by the Indo-European tongues of the European conquerors and settlers of the New WorldEnglish, Spanish, Portuguese, French, and Dutch.