Okay, I'm trying to write it again.
steissd:
'German' was first mentioned in a "notable" way by naming king Ludwig II.
Ludwig den Deutschen), (L. the German), ca. 805-876
King (König) after 843. Son of Ludwig I, whom he deposed
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Quote:The Carolingian Empire was based on an alliance between the emperor, who was a temporal ruler supported by a military retinue, and the pope of the Roman Catholic Church, who granted spiritual sanction to the imperial mission. Charlemagne and his son Louis I ( 814-40) established centralized authority, appointed imperial counts as administrators, and developed a hierarchical feudal structure headed by the emperor. Reliant on personal leadership rather than the Roman concept of legalistic government, Charlemagne's empire lasted less than a century.
A period of warfare followed the death of Louis. The Treaty of Verdun (843) restored peace and divided the empire among three sons, geographically and politically delineating the approximate future territories of Germany, France, and the area between them, known as the Middle Kingdom . The eastern Carolingian kings ruled the East Frankish Kingdom, what is now Germany and Austria; the western Carolingian kings ruled the West Frankish Kingdom, what became France. The imperial title, however, came to depend increasingly on rule over the Middle Kingdom. By this time, in addition to a geographical and political delineation, a cultural and linguistic split had occurred. The eastern Frankish tribes still spoke Germanic languages; the language of the western Frankish tribes, under the influence of Gallo-Latin, had developed into Old French. Because of these linguistic differences, the Treaty of Verdun had to be written in two languages.
source: own summary from various history books.
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People living in France and having French as "mothertongue", may speak as well (a few 'only'): Flemish, Basque, Bretonnic, Alsacian, ... ... .
Perhaps, you use the above given link(s) and/or google to find more.