Gdynia is a city in northern Poland and a seaport on the Baltic Sea coast. With an estimated population of 257 000, it is the 12th-largest city in Poland and the second-largest in the Pomeranian Voivodeship after Gdańsk. Gdynia is part of a conurbation with the spa town of Sopot, the city of Gdańsk, and suburban communities, which together form a metropolitan area called the Tricity (Trójmiasto) with around one million inhabitants.

Kashubian or Cassubian is a West Slavic language belonging to the Lechitic subgroup along with Polish and Silesian. Although often classified as a language in its own right, it is sometimes viewed as a dialect of Polish.