On the elasticity of centers and the possibility of multiple roofs: revisiting some of Ulrich Ammon's views on language variation and pluricentricity

Against the background of a concise overview of Ulrich Ammon’s oeuvre this article first of all provides a constructive-critical account of some of the key concepts and questions that guided his macrosociolinguistic work on pluricentric languages and variation in German. In what follows, an attempt is made to further develop some of Ammon’s thoughts through emphasising the elasticity of the concept of pluricentricity and arguing for a creative use of the concept of “roofing” when describing the intricate interplay of standard and nonstandard varieties especially in language contact zones.