Shoshoni and Mono are from the same language family, the Numic family. 
That is why the numbers in the two languages look somewhat similar. 

Hopi and Cahuilla are more distantly related to Shoshoni.

Mono is spoken in central California;
Hopi is spoken in northeastern Arizona;
Cahuilla is spoken in southern California. 

(Sources: A Dictionary of Western Mono, by Bethel et al., Anthropology Department, Idaho State University, 1993; Lessons in Hopi, by Milo Kaectaca, University of Arizona Press, 1978; Chem'ivillu' (Let's Speak Cahuilla), by Katherine Siva Saubel and Pamela Munro, American Indian Studies Center, UCLA, 1981.)