140 (2000 INALI). No monolinguals.
Chiapas state: Motozintla and Tuzantán on Guatemala-Mexico border.
Motozintleco, Tuzanteco (Muchu’). Not intelligible of Mam varieties (1973 SIL). Tuzanteco and Mocho are 2 distinct dialects of the same language (1967 T. Kaufman).
Home only. Mainly older adults. Also use Spanish [spa].