High German
Main article: High German languages
High German is divided into Central German and Upper German. Central German dialects include Ripuarian, Moselle Franconian, Rhine Franconian, Central Hessian, East Hessian, Lower Hessian, Thuringian, Silesian, High Franconian, Lorraine Franconian, Mittelalemannisch, North Upper Saxon, High Prussian, South Markish and Upper Saxon. It is spoken in the southeastern Netherlands, eastern Belgium, Luxembourg, parts of France, and in Germany approximately between the River Main and the southern edge of the Lowlands. Modern Standard German is mostly based on Central German, but it should be noted that the common (but not linguistically correct) German term for modern Standard German is Hochdeutsch, that is, High German
http://en.wikipedia.org/wiki/German_language