Frisian
From Wikipedia:
Frisian language can refer to:
The Frisian languages, a closely related group of three Germanic languages:
o West Frisian language (fy), spoken in the Netherlands and often known there simply as the Frisian language
o Saterland Frisian (frs) or East Frisian language, spoken in Lower Saxony, Germany
o North Frisian language (frr), spoken in Schleswig-Holstein, Germany
o East Frisian Low Saxon, the West Low German dialect of East Frisia, Lower Saxony, Germany
Wikipedia: Frisian languages (English)
Wikipedia: Friesische Sprache (German)
Wikipedia: Fryske talen (Frisian)