Sercquiais (French pronunciation: [sɛʁkjɛ]), also known as lé Sèrtchais, Sarkese or Sark-French, is the Norman dialect of the Channel Island of Sark (Bailiwick of Guernsey).
Sercquiais is a descendant of the 16th century Jèrriais used by the original colonists; 40 families mostly from Saint Ouen, Jersey who settled the then uninhabited island, although influenced in the interim by Guernésiais (the dialect of Guernsey). It is also closely related to the now-extinct Auregnais (Alderney) dialect, as well as to Continental Norman. It is still spoken by older inhabitants of the island and most of the local placenames are in Sercquiais.