The Flecheiros is one of the uncontacted peoples in the Javari region ( Carlos Alberto Ricardo 1986 ). If anything, Ethnographic considerations would point to the language being Kanamarí [knm]. But since Scott Wallace 2011 recounts one meeting between a Kanamarí [knm] and the Flecheiros, showing that the two have different languages, they arguably speak a language not counted already in E16/E17/E18/E19/E20/E21/E22/E23/E24/E25/E26/E27. See also: Katukína-Kanamarí [knm].