The languages of Mesoamerica belong to 6 major families – Mayan, Oto-Mangue, Mixe–Zoque, Totonacan, Uto-Aztecan and Chibchan languages (only on the southern border of the area) – as well as a few smaller families and isolates – Purépecha, Huave, Tequistlatec and Misumalpan. Among these Oto-Manguean and Mayan families account for the largest numbers of speakers by far – each having speakers numbering more than a million. Many Mesoamerican languages today are either endangered or already extinct, but others, including the Mayan languages, Nahuatl, Mixtec and Zapotec, have several hundred thousand speakers and remain viable.