Wangerooge East Frisian is an extinct dialect of the East Frisian language, formerly spoken on the East Frisian island of Wangerooge. Wangerooge Frisian was a part of the Weser group of dialects which included the Wangerooge and equally extinct Wursten dialect. The last speaker died in 1953.
References
Wangerooge Frisian Wikipedia(Text) CC BY-SA