Quiripi (pronounced /ˈkwɪrɪpiː/ KWIH-rih-pee,[1] also known as Mattabesic,[2] Quiripi-Unquachog, Quiripi-Naugatuck, and Wampano) was an Algonquian language formerly spoken by the indigenous people of southwestern Connecticut and central Long Island,[3][4] including the Quinnipiac, Unquachog, Mattabessett (Wangunk), Podunk, Tunxis, and Paugussett (subgroups Naugatuck, Potatuck, Weantinock).

It has been effectively extinct since the end of the 19th century,[5] although Frank T. Siebert, Jr., was able to record a few Unquachog words from an elderly woman in 1932.

[4] Unfortunately, the catechism was "poorly translated" by Pierson,[4] containing an "unidiomatic, non-Algonquian sentence structure.

"[18] Additionally, three early hymns written circa 1740 at the Moravian Shekomeko mission near Kent, Connecticut, have been translated by Carl Masthay.

[19] Linguist Blair Rudes attempted to reconstitute the phonology of Quiripi, using the extant documentation, comparison with related Algonquian languages, as "reconstructing forward" from Proto-Algonquian.