Berck of Berck-sur-Mer is a town in the French department of Pas-de-Calais region (Region Nord-Pas-de-Calais) and has only 14 000. Berck sur Mer is the lower part of the arrondissement Montreuil. The acquisition is Berck-old Dutch for birch tree. Thus this village has the most Southern Dutch takeover in France.
Berck sur Mer is located on the Opal Coast. The Opal Coast (French: Côte d'Opale) is a coastal strip in the Nord-Pas-de-Calais in northern France. It contains a portion of the coast of the English Channel from Dunkirk to Berck at the mouth of Authie. The French coast on the North Sea, between the Belgian border in Bray-Dunes and Dunkerque, is identified by the name Côte des Dunes de Flandre (the Flemish coastal dunes).
The character of the coast changes as you go further west. Is the North Sea coast near Dunkirk (French Westhoek) is relatively flat with a modest stretch of dunes, the extreme northwest tip along the strait at Cap Blanc-Nez and Cap Gris-Nez on is marked above the sea uitstijgende cliffs.
Culturally and historically, the area is very evident in the early Middle Ages were still along the coast Germanic dialects. Many places have therefore a Low Franconian or Flemish origin, and the same names that are found in Flanders. Over the centuries, the language barrier, however, increasingly shifted to the east. Currently, only the French Westhoek are Franco-Flemish dialects.