Atatláhuca–San Miguel Mixtec
Atatláhuca–San Miguel Mixtec is a diverse Mixtec language of Oaxaca.Dialects
Egland & Bartholomew found six dialects which had about 70% mutual intelligibility with each other:
Ethnologue notes that two additional varieties Egland & Bartholomew had not looked at, Sinicahua and Tijaltepec , are about as similar.