Estetla Mixtec is a diverse Mixtec language of Oaxaca.
Dialects Egland & BartholomewEgland & Bartholomew (1983) La Inteligibilidad Interdialectal en México found four dialects which have about 75% mutual intelligibility with each other:
(Santa María) Peñoles (San Antonio) Huitepec (Santiago) Tlazoyaltepec (San Juan) Tamazola
References
Sources No author. 1977. Mixteco de Santa María Peñoles, Oaxaca. Mexico City: Centro de Investigación para la Integración Social. Series: Archivo de Lenguas Indigenas de Mexico. Daly, John P. 1973. A generative syntax of Peñoles Mixtec. Norman, Oklahoma: Summer Institute of Linguistics of the University of Oklahoma.