| Chinantec, Ojitlan | |
| Chinantec, Ozumacin | |
| Chontal, Lowland Oaxaca | |
| Mazatec, San Jerónimo Tecóatl: San Pedro Ocopetatillo | |
| Mixtec, Ocotepec | |
| Mixtec, Ocotepec: Cuquila | |
| Mixtec, Ocotepec: San Miguel del Progreso | |
| Nahuatl, Huasteca Occidental | |
| Nahuatl, Orizaba | |
| Náhuatl, Oaxaca North | |
| Otomi, Estado de Mexico: San Felipe y Santiago | |
| Otomi, Mezquital | |
| Otomi, Queretaro | |
| Otomi, Sierras | |
| Otomi, Temoaya | |
| Otomi, Texcatepec | |
| Popoloca, San Felipe Otlaltepec | |
| Purepecha, Sierra Occidental | |
| Tzeltal: Oxchuc | |
| Zapotec, Ocotlan: Asuncion | |
| Zapotec, Ocotlan: La Garzona | |
| Zapotec, Ocotlan: Santa Lucia | |
| Zapotèque (Ocotlan) | |
| Zapotèque (Ozolotépèque) | |
