The Uto-Aztecan language family is a group of languages spoken primarily in the western United States and Mexico. It includes languages such as Nahuatl, spoken by the Aztecs, and Hopi, spoken by the Hopi people. This family is divided into two main branches: the Northern Uto-Aztecan languages and the Southern Uto-Aztecan languages. Linguists believe that the Uto-Aztecan languages share a common ancestor, which may have existed over 2,000 years ago. The languages are known for their rich vocabulary and complex grammatical structures, reflecting the diverse cultures and histories of the speakers.