The closest related languages are O'odham (Pima and Papago) and the O'othams.

There are three major communities in the O'ob No'ok region (Yepachic, Maycoba [es] and Yécora), but many of the people live in small outlying hamlets and on isolated family ranches rather than the larger towns.

Zarina Estrada-Fernández studied the language, publishing an overview of its grammar, syntax, and vocabulary.

She identified consistent dialectal differences between communities in the region, especially between villages in Sonora and those in Chihuahua.

Pima Bajo is an agglutinative language, where words use suffix-complexes for a variety of purposes with several morphemes strung together.