The indigenous languages of Northern Mexico, if I'm correctly interpreting what is spoken in
Northern Mexico, seem to consist of Yuman-Cochimí languages in Baja California, a language isolate in Sonora called Seri, and a bunch of Uto-Aztecan languages. The other languages in the area appear to be Spanish, Plautdietsch (Platt, Lower German), English, and Afro-Seminole Creole.