By the early Middle Ages, Pomerania was largely populated by West Slavic Pomeranians who spoke the Pomeranian language. During the Middle Ages, German colonists from western parts of the Holy Roman Empire began settling in Pomerania as part of the medieval Ostsiedlung. Most native Pomeranians gradually became Germanized. The Low German language of the Hanseatic League was used throughout the territories surrounding the Baltic Sea. The East Low German language of the colonists were influenced by the local Pomeranian and Polabian languages, creating the Pomeranian dialects.
Beginning in 1945, Germans east of the Oder-Neisse line were expelled to western Germany after World War II. Most of the Pomeranian dialects have largely died out in the following decades as the expellees were assimilated into their new homes, although Pomeranian dialects are still spoken in Hither Pomerania, part of the German state of Mecklenburg-Western Pomerania.
Pomeranian dialects formerly or currently spoken in Pomerania include: