SIL has not done extensive investigations in Chocholteco of Oaxaca (also known as Ngigua).

Mazatec includes four or five important variants (in Oaxaca, Veracruz and Puebla). The Summer Institute of Linguistics has done investigations in four of these.

Popoloca has six important variants in the state of Puebla.

The name Ixcatec is used for another language of this family, believed by many to be extinct, and also for a variant of Mazatec.

You can find on this website information about or in the following varieties of Popolocan languages:

• Eloxochitlán / San Jerónimo Mazatec

• dictionaries, vocabularies (Mazatec, Popoloca)
• grammars (Mazatec, Popoloca)
• analyzed texts (Mazatec)
• contribution to the Archivo de Lenguas Indígenas de México (Ngigua, Mazatec)

• primers
• books of traditional stories
• Xu̱ju̱n énchá (Stories and anecdotes, in Jalapa de Díaz Mazatec, Oaxaca)
• TI̱NCHÍYAI XU̱JU̱N (Lessons in Reading and Writing, in Jalapa de Díaz Mazatec, Oaxaca)
• National anthem in Mazatec
• New Testaments (Mazatec, Popoloca)

• technical articles
• doctoral dissertation

• The Popolocan family is part of the Otomanguean stock.
• Short biography of George and Florence Cowan
• Population statistics by language family
• Ethnologue listing (Popolocan family)