Amuzgo is an Oto-Manguean language spoken in the Costa Chica region of the Mexican states of Guerrero and Oaxaca by about 60,000 speakers.

The name Amuzgo is claimed to be a Nahuatl exonym but its meaning is shrouded in controversy; multiple proposals have been made, including [amoʃ-ko] 'moss-in'.

Four varieties of Amuzgo are officially recognized by the governmental agency, the Instituto Nacional de Lenguas Indígenas (INALI).

[7] The dialect presented in the following chart is Upper Eastern, as spoken in San Pedro Amuzgos as analyzed by Smith & Tapia (2002).

The following chart is based on Coronado Nazario et al. (2009) for the variety of Southern Amuzgo spoken in Huixtepec.

Various other important details about the phonetics of Amuzgo are not presented in a simplified chart such as the one shown above.

The following words are apparently distinguished only by tone in Huixtepec: /ha/ 'sour' (low), /ha/ (mid) 'I', /ha/ (high-low) 'we (exclusive)', and /ha/ (high) 'we (inclusive)'.