San Bernardino is a village in Oaxaca, Mexico, in the municipality of Santa María Tonameca.
Map of San Bernardino, Oaxaca, Mexico
Coatecas Altas Zapotec is spoken as a result of families coming to the village from Coatecas Altas, Oaxaca.
References
San Bernardino, Oaxaca Wikipedia(Text) CC BY-SA