Tingui-Boto [tgv] is listed in E16/E17/E18/E19 as an unclassified language of Brazil. There is certainly a corresponding ethnic group, but this group speaks Portuguese. They retain some of their ancestral language for ritual purposes, but this language is Dzubukuá (According to Vera Lúcia Calheiros Mata <http://pib.socioambiental.org/pt/povo/tingui-boto/1050> accessed 7 February 2012.). Dzubukuá ( de Queiroz, José Márcio Correia 2012 ) is subsumed under the (otherwise highly problematic) Kariri-Xoco [kzw] entry. See also: Karirí-Xocó [kzw].