It is similar to the other Dhegihan languages: Kansa, Omaha, Osage and Ponca.

The Quapaw language is well-documented in field notes and publications from many individuals including by George Izard in 1827, by Lewis F. Hadly in 1882, from 19th-century linguist James Owen Dorsey, in 1940 by Frank Thomas Siebert, and, in the 1970s by linguist Robert Rankin.

To address this issue, an online dictionary of the Quapaw language is being compiled which incorporates all of the existing source material known to exist into one document using a version of the International Phonetic Alphabet which has been adapted for Siouan languages.

Ardina Moore taught Quapaw language classes through the tribe.

The 2nd Annual Dhegiha Gathering in 2012 brought Quapaw, Osage, Kaw, Ponca, and Omaha speakers together to share best practices in language revitalization.