Zapotec languages and dialects fall into four broad geographic divisions: Zapoteco de la Sierra Norte (Northern Zapotec), Valley Zapotec, Zapoteco de la Sierra Sur (Southern Zapotec), and Isthmus Zapotec.
Four Amuzgo varieties are spoken in the Costa Chica region of the states of Guerrero and Oaxaca by about 44,000 speakers [REF].