The British isle with its own language

Very few people outside the island know that Jersey has its own language – or that it was cannily used as a clandestine code during German occupation in WW2.

"Bonsouair! Seyiz les beinv'nus!" announced Jo Thorpe, as she stepped up to the microphone and spread her arms in welcome. "Or for anyone who's not from Jersey, good evening and welcome! We're thrilled to see you tonight, and we hope you enjoy the show."
Jersey is the largest of the Channel Islands, an archipelago of six inhabited islands (and many more uninhabited ones) scattered over the English Channel, just over 14 miles from the French coast. Despite its proximity to France, it's actually a British Crown Dependency, and as such, the island has two official languages: English and French. But it also has Jèrriais.
Linguistically, Jèrriais's closest relative is Norman French, a dialect that dates back to the days when Normandy was still its own independent kingdom, and which incorporates many words from Old Norse, a legacy of the Normans' own Viking ancestry. Jèrriais shares much in common with the other languages of the Channel Islands, including Guernésiais (Guernsey) and Sercquiais (Sark), which are still spoken by a handful of people, and Auregnais (Alderney), which died out in the late 19th Century.