Tilantongo (Diuxi-Tilantongo) Mixtec is a Mixtec language of Oaxaca. It is not close to other varieties of Mixtec. Numbers are declining due to emigration to the United States.It is also called Central Nochistlán Mixtec, Diuxi-Tilantongo Mixtec, Mixteco de Diuxi-Tilantongo, and Mixteco del Este Central.