Thanks for the explaination. European history is not my turf. I'm an American History nut; that is, from the Civil War through Western expansion. Never could get into the European stuff except for WWII.
at that point in time i think in northern modern france you would have had a romano-gallic culture (speaking latin) being heavily repopulated by german tribes. While provincial romance did survive as the language, there is some speculation that the unusual vowel and consonant structure of french in north-western france (including paris) is related to moderately heavy germanic immigration in the late roman period and its impact on the spoken dialects of the language. It is unquestionable that french in that part of the country diverges in pronunciation patterns from romanish languages in portugal, spain, italy, romanish west switzerland, and southern france in some notable ways.