Kwaza (also written Kwazá or Koaiá) is an endangered language spoken by the Kwaza people of Brazil. Like many other languages in the area, it is an unclassified language, but there are hypothesized long-distance genetic relationships. Little is known about Kwaza people and language due to the minimal historical sources available; if mentioned in reliable documents, it is usually in reference to its neighbors. What is known, is that the Kwaza people were at one point a fierce nation of a few thousands persons, which could be subdivided into various groups.