Kaszubian
Kaszubian is a West Slavic language spoken primarily in the Kaszuby region of northern Poland. It is part of the Lechitic group of languages, which also includes Silesian and Masurian. Kaszubian has its own distinct grammar and vocabulary, influenced by both Polish and German.
The language is recognized as a regional language in Poland and has a rich cultural heritage, including folklore, music, and literature. Efforts to promote and preserve Kaszubian include education in schools and the publication of books and newspapers in the language.