Viking raids in the Rhineland
The area known today as the Rhineland begins at the confluence of the Moselle and the Rhine and ends at Emmerich, where the Rhine divides into the Lek and the Waal to form a delta. In the east, the Rhineland ends close to the Rhine itself, being bounded by low mountain ranges such as the Siebengebirge or Bergisches Land. To the west its boundary is less well defined, but in general parlance it runs beyond the present state border with the Netherlands, i.e. east of the Meuse. Because the modern state of Rhineland-Palatinate lies south of the Moselle, the low mountain range of the Eifel north of the river is usually seen as belonging to the Rhineland. Areas south of the Moselle, such as the Hunsrück, are also considered to be part of the Rhineland.
Rhinelandic
Rhinelandic is a term occasionally used for linguistic varieties of a region on both sides of the Middle and Lower Rhine river in Central West Germany, Belgium, the Netherlands, and Luxembourg. It has at least two distinct meanings which often can only be determined from the fine grain context in which the term is used. (This could be complicated at times since in German publications, local languages of villages or cities are commonly referred to as "the dialects" or "dialect", whereas the regiolects, which are dialects of Low German or High German in a linguistic sense, are hardly called so, but referred to using terms like "Rhinelandic", "Hessian," or "Bavarian", etc., that also name large compounds of related local languages
) One of the meanings of "Rhinelandic" is that of a group of local languages in an area called the Rhineland. Another meaning is that of the regiolect being used by the people approximately of the same area.