Walloon (Walon in Walloon) is a Romance language that was spoken as a primary language in large portions (70%) of Wallonia in Belgium, in some villages of Northern France (near Givet) and in the northeast part of Wisconsin until the mid 20th century and in some parts of Sweden. It belongs to the langue d'oïl language family, whose most prominent member is the French language. The historical background of its formation was the territorial extension since 980 of the Principality of Liège to the south and west.