Куршская коса
Kursenieki language (Kursenieki: ; ; ; ) or Curonian language of the Curonian isthmus () is a dialect of the Latvian language spoken by the Kursenieki of the Curonian Spit, a thin strip of land stretching between southwestern Lithuania and the Kaliningrad exclave of Russia, formerly part of Germany. In the process of various migrations of the 14th–17th centuries, Curonians (already speaking a Latvian dialect) settled along the Curonian Spit in East Prussia and became known as Kursenieki.