The Mixtec language is part of the Otomanguean family of languages, a family found in Mesoamerican that includes Zapotec, another indigenous language found in Oaxaca. Mixtec speakers arrived in Oaxaca, notably the Alta region, during the early Formative period, 1500-750 BCE. Agriculture formed the base for Mixtec civilization and agricultural villages have been dated to 1350 BCE. Today Mixtec speakers are still found in Oaxaca and the neighboring regions of Puebla and Guerrero, though migration is spreading Mixtec speakers across Mexico and through the United States.