Mayan languages system developed by the Academia de Lenguas Mayas de Guatemala (ALMG). Orthographies for the languages of Mexico are currently being developed by the Instituto Nacional de Lenguas Indígenas (INALI). The pre-Columbian Maya civilization developed and used an intricate and fully functional writing system, which is the only Mesoamerican script that can be said to be almost fully deciphered. Earlier-established civilizations to the west and north of the Maya homelands that also had scripts recorded in surviving inscriptions include the Zapotec, Olmec, and the Zoque-speaking peoples of the southern Veracruz and western Chiapas area—but their scripts are as yet largely undeciphered.
Mayan languages is the "Macro-Mayan" hypothesis, which posits links between Mayan, the Mixe–Zoque languages and the Totonacan languages, but more research is needed to support or disprove this hypothesis. In 2015, Campbell noted that recent evidence presented by David Mora-Marin makes the case for a relationship between Mayan and Mixe-Zoquean languages "much more plausible". The Mayan family consists of thirty languages. Typically, these languages are grouped into 5-6 major subgroups (Yucatean, Huastecan, Ch'olan-Tseltalan, Q'anjob'alan, Mamean, and K'ichean). The Mayan language family is extremely well documented, and its internal genealogical classification scheme is widely accepted and established, except for some minor unresolved differences.