- Language: Kashubian
- Alternate names: Cassubian, Kaszubski, Cashubian
- Language code: csb
- Language family: Indo-European, Slavic, West, Lechitic (SIL classification)
- Number of speakers: 50,000
- Vulnerability: Vulnerable
- Script: Latin script.
Most of ethnic group speak regional variety of Polish (See: [[Polish]]) (1993 T. Salminen).
Kashubian is spoken in Poland, Europe.