group of West Slavic languages composed of Polish (Polish language), Kashubian and its archaic variant Slovincian, and the extinct Polabian language. All these languages except Polish are sometimes classified as a Pomeranian subgroup.

In the early Middle Ages, before their speakers had become Germanized, Pomeranian languages and dialects were spoken along the Baltic in an area extending from the lower Vistula River to the lower Oder River. Kashubian and Slovincian survived into the 20th century; there were still a considerable number of native speakers of Kashubian in Poland and Canada in the 1990s. The extinct Polabian language, which bordered the Sorbian dialects in eastern Germany, was spoken by the Slavic population of the Elbe River region until the 17th or 18th century; a dictionary and some phrases written in the language exist.