Barrister Enclave

Once several years ago I had this dream, as is recorded in my Book of Dreams:

Last night I had a dream that some of us were in Belgium, travelling around, and we were up in the Flemish-speaking part, in the north, and next we were going to visit the Belgian city of Flève, right where the Belgian border joins the Netherlands and the sea, and which is a sea of linguistic oddity, as they speak there French, an archaic dialect, fourteenth-century Law French, since this city on the coast was ruled for centuries by England, and Englishmen in legal barrister wigs.