'''Kaşub dili''' və ya '''Kassub dili'''(Kaşubca:''kaszëbsczi jãzëk'', ''pòmòrsczi jãzëk'', ''kaszëbskò-słowińskô mòwa''; {{lang-pl|język kaszubski, język pomorski, język kaszubsko-słowiński}}) [[Slavyan dilləri]]nin [[Lehit dilləri|Lehitlehit]] alt qrupuna aid olan dildirdil. <ref name=Barbour>Stephen Barbour, Cathie Carmichael, ''Language and Nationalism in Europe'', Oxford University Press, 2000, p.199, ISBN 0-19-823671-9</ref><ref name=Hopkins>[http://docs.google.com/viewer?a=v&q=cache:PSNtcE125hIJ:journals.uvic.ca/index.php/WPLC/article/download/5114/2023+%22Paul+Hopkins+linguist&hl=pl&pid=bl&srcid=ADGEESgsdvemhEGRfqefg_xrqazJNdGot9-aXGDlTkYNmh19jHDjZfEsrPgMLAXm_ezsIGZedHG9esVD2QGuUx6qBZ9SLCRvHUhU-8rOsZ6BM7NdSxpc8XM6-q5ojC2zeuEBuhsb_KJV&sig=AHIEtbTmHvh8jnC-Qt46x7x2IH2acz-lSA KASHUBIAN - LANGUAGE OR DIALECT?] - Paul Hopkins, Department of Linguistics - [[University of Victoria]]</ref><ref name=Faska>[http://www.uni-leipzig.de/~sorb/seiten/eng/03/language.html About Languages] - [[University of Leipzig]]</ref>