Valle Nacional Chinantec

Palantla Chinantec, also known as Chinanteco de San Pedro Tlatepuzco, is a major Chinantecan language of Mexico, spoken in San Juan Palantla and a couple dozen neighboring towns in northern Oaxaca. The variety of San Mateo Yetla, known as Valle Nacional Chinantec, has marginal mutual intelligibility.

A grammar and a dictionary have been published.

The language is unusual in having, for some speakers, a three-way contrast between non-nasalized, lightly nasalized, and heavily nasalized vowels.