High Quality Content by WIKIPEDIA articles! Nahuatl (Nahuatl pronunciation: ( listen), with stress on the first syllable) is a group of related languages and dialects of the Nahuan (traditionally called "Aztecan") branch of the Uto-Aztecan language family. Collectively they are spoken by an estimated 1.5 million Nahua people, most of whom live in Central Mexico. All Nahuan languages are indigenous to Mesoamerica.