This family of languages includes two subfamilies, the Mixean subfamily (which includes the Mixe languages of Oaxaca and also Sayula Popoluca and Oluta Popoluca in the state of Veracruz) and the Zoquean subfamily (which includes the Zoque languages of Chiapas, Oaxaca and Tabasco, and Sierra Popoluca and Texistepec Popoluca in Veracruz).

• technical articles, including:
• A Comparison of Person Markers in Sayula and Oluta Popoluca, published in the SIL Electronic Working Papers
• primers
• books of traditional stories
• dictionaries, vocabularies, Vocabulario popoluca
• analyzed texts
• tesis para maestría
• doctoral dissertations
• New Testaments
• Old Testament summaries
• grammars
• contributions to the Archivo de Lenguas Indígenas de México

• Ethnologue listing