Nahuatl in all its dialects, often taken as a group of languages, spoken in large areas of central Mexico and El Salvador and in various small, widely dispersed areas throughout southern Mexico and Central America. Found on https://www.infoplease.com/dictionary/nahuatlan
1) Aztecan 
Nahuatl in all its dialects, often taken as a group of languages, spoken in large areas of central Mexico and El Salvador and in various small, widely dispersed areas throughout southern Mexico and Central America.