What is "weststellingwerf"

Weststellingwerf (, Stellingwarfs: Weststellingwarf / Stellingwarf-Westaende) is a municipality in the province of Friesland in the northern Netherlands. It is one of the municipalities of Friesland, where the spoken language is not West Frisian; instead, Stellingwerfs, a dialect of Dutch Low Saxon, is spoken here.