Kashubian, Cassubian or Pomeranian is one of the Lekhitic languages, which is a group of Slavonic languages.
In year 1000 it was spoken by the Pomeranians or Kashubians in the entire region of Pomerania on the south coast of the Baltic Sea between the Vistula and Odra rivers.
In 2000 it has some 200,000 speakers mainly in Eastern Pomerania in north Poland.