The terms Rhinelandic, Rhenish, and Rhinelandic regiolect refer to the vernacular lect spoken in the so-called Rhineland of West Germany. Wikipedia

Regional dialect Wikidata

The regional variety of German spoken in the Rhineland in Germany, which is approximately the former Prussian Rhine Province, or the West half of todays federal state North Rhine-Westphalia plus the North half of todays federal state Rhinland-Palatinate. It is both related to modern Standard German, and the various rather diverse hereditary local languages, and at the same time clearly distinct from either. OmegaWiki