Chiapanec language
Chiapanec is a presumably extinct indigenous Mexican language of the Oto-Manguean language family. The 1990 census reported 17 speakers of the language in southern Chiapas out of an ethnic population of 32, but later investigations failed to find any speakers. There are, however, a number of written sources on the language. Vocabularies and grammars based on these materials include Aguilar Penagos (2012) and Carpio-Penagos and Álvarez-Vázquez (2014). It is closely related to Mangue.