Chicomuceltec (also Chikomuselteko or Chicomucelteco; archaically, Cotoque) is a Mayan language formerly spoken in the region defined by the municipios of Chicomuselo, Mazapa de Madero, and Amatenango de la Frontera in Chiapas, Mexico, as well as some nearby areas of Guatemala.

[1] Communities of contemporary Chicomucelteco descendants, numbering approximately 1500 people in Mexico and 100 in Guatemala[2] are Spanish speakers.

[4] A two-page document dated to 1775 which was retrieved from the Bibliothèque nationale de France in Paris is the oldest-known testament of the Chicomuceltec language.

[5] The geographical distribution of Wastek and Chicomuceltec in relation to the rest of the Mayan languages —with Wastek centered on the northern Gulf Coast region away from the others lying south and east of the Isthmus of Tehuantepec— led Kroeber to also propose that Chicomuceltec was either a remnant population left behind after the Huastec people's migration north from the Chiapas highlands region, or alternatively represented a return of a Huastec subgroup to their earlier homelands.

[6] By the early 20th century it was clear the language was in decline, and when in 1926 Franz Termer visited the community of Chicomucelo, he reported finding only three individuals (all over 60 years of age) who could speak Chicomuceltec, out of a township of approximately 2,500.