Caribean are an indigenous language family of South America. Carib languages are widespread across northern South America, from the mouth of the Amazon River to the Colombian Andes and from Maracaibo (Venezuela) to Central Brazil. Caribean languages are relatively close to each other; in some cases, it is difficult to decide whether different groups speak different languages or dialects of the same language. Because of this, the exact number of Caribean languages is not known with certainty (current estimates range from 25 to 40, with 20 to 30 still spoken). The Caribean family is well known in the linguistic world due to Hixkaryana, a language with Object-Verb-Subject sentences, previously thought not to exist in human language.