Murui Huitoto - (or simply Murui also known as Bue, Witoto Murui or Witoto) is an indigenous American Huitoto language of the Witotoan family. Murui is spoken by about 1,100 Murui people along the banks of the Putumayo, Cara-Paraná and Igara-Paraná rivers in Colombia. In Peru it spoken in the North alongside the Ampiyacu and Napo rivers by some 1,000 people. Some Murui speakers live also outside their territories, for instance the vicinity of Leticia, Amazonas, Colombia.
Approximately 1,000 Peruvians use Murui in both its written and oral forms. The language is accorded official status and is used in schools. It is also used in churches. There are no Murui-an monolinguals in Peru: speakers of the language who do not also use another language. The language has 1,900 speakers in southwestern Colombia where it has higher social utility and standing. It was formerly spoken in Brazil, but is now extinct in that country.
Murui uses the Roman Script. There is a dictionary of the Murui language (Murui-Spanish and Spanish-Murui) compiled by an SIL linguist, Shirley Burtch (1983), and number of works concerning its grammar (Petersen de Piñeros 1994, Petersen de Piñeros & Patiño: 2000, Wojtylak 2012).
Currently, a PhD student at James Cook University, Katarzyna Wojtylak is working on a comprehensive grammar of Murui to be published in 2017. Wikipedia