Ocuiltec, also known as Tlahuica and Atzingo Matlatzinca, is a moribund language of Central Mexico closely related to Matlatzinca and Pirinda.[5]
Ocuiltec is spoken primarily in the municipality of Ocuilan in the villages Cinco Caminos, Colonia Doctor Gustavo Baz, El Capulín, El Totoc (San José Totoc), Lomas de Teocaltzingo (Loma de Tecalzingo), Ocuilán de Artéaga, San Juan Atzingo, Santa Lucía, Santa Martha, and Santa María Nativitas.[1][4][6] It may have been spoken in the adjacent area of Morelos, though Matlatzinca could have also existed in it.[7]
Due to the extremely small speaking population and the unfavourable age structure, Ocuiltec is highly endangered. In the 2000 census, only 26 persons under the age of 20 were registered as speakers of Ocuiltec.
^Maldonado, Druzo (1990), Cuauhnáhuac y Huaxtepec (tlahuicas y xochimilcas en el Morelos Prehispánico), p. 25, En relación a la lengua que probablemente se hablaba en Morelos antes de la llegada del náhuatl, Smith sugiere en base a inferencias arqueológicas y documentales que, matlatzinca [y/o ocuilteca] se hablaba en el oeste, y mixteco y/o popoloca al este (1983:21)
^Muntzel, Martha C.; Nestor, Natividad González (2017). Tlahuica de San Juan Atzingo, Ocuilan, Estado de México. México: El Colegio de México.