Otuke (Otuque) is an extinct language of the Macro-Gê family, related to Bororo. Several attested extinct Bororoan varieties were either dialects of Otuku or closely related: Covareca, Curuminaca, Coraveca (Curave), Curucaneca, Tapii. Mason (1950) says the first four are "separate and very different", but Loukotka (1968) notes that nothing is known of Curave or Curucane (or of Tapii), that only 14 words of Curumina and 19 of Covare have been preserved.