Hessian dialects
The border to the Low German language area is marked by a here spatially very narrowly limited isoglossic bundle - the Benrath line, which here, unlike west and east, is hardly fanned out. This language boundary (or maken-machen or ik-ich line) between Low German and Central German language varieties or Hessian belongs to the dialect continuum, but it is probably one of the most sharply formed transitional areas in the German language area. In contrast, the border to the south is characterized by particularly wide isoglosses and is correspondingly blurred. The transition to Palatine, to East Franconian and to Thuringian is fluent.