Piapoco is an Arawakan language of Colombia and Venezuela.

A "Ponares" language is inferred from surnames, and may have been Piapoco or Achagua.

Piapoco is a branch of the Arawak language, which also includes Achagua and Tariana.^[2] Piapoco is considered a Northern Arawak language.^[3] There are only about 3,000 Piapoco speakers left today. These people live in the Meta, Vichada, and Guaviare rivers in Colombia^[4] Piapoco speakers also reside in Venezuela.^[5] It is an endangered language.^[5]

The Piapocos come from the larger tribe, the Piaroa, who are indigenous to the Amazon rain forest.^[6] The Piapoco people originally lived in the midsection of Rio Guaviare, later moving in the 18th century to avoid settlers, missionaries, and others.^[7]

A Piapoco-Spanish dictionary containing 2,500 words was written by Deloris Klumpp, in which botanical identification of plants were captured, although not all.^[3] The Piapoco language follows the following grammatical rules: plural suffix -nai used for animates only, derivational suffixes masculine -iri, feminine -tua, suffix -mi 'late, defunct,' nominalizing -si, declarative mood marker -ka.^[3] Piapoco is unique in that it seems to be a nominative-accusative language.^[3] There are eighteen segmental phonemes, fourteen consonant and four vowels in the Piapoco language.^[8]

The word Piapoco is a Spanish nickname in reference to the toucan.^[4] Most Piapoco also speak Spanish.^[7] Speakers who have had less contact with Spanish speakers more often pronounce the phoneme "s" as a voiceless interdental fricative.^[8] Younger speakers of the Piapoco language tend to eliminate the "h" more than older speakers due to their contact with the Spanish language.^[8]

When a large portion of people come in contact with another language and are competent in it, their language gradually becomes more like the other.^[10] This allows for a gradual convergence, where grammar and semantics of one language begin to replicate the other.^[10]