So not french, Scandinavian.
William’s maternal lineage likely included local Frankish or French blood, as Herleva was a Norman woman of non-noble origin, possibly from a family of tanners or minor landowners in Falaise.
They had been French for 100 years or more.
I was intrigued when I understood that not only is English a bastardised mix of Gallo-French with Angko Saxon and a bitter Norse tossed into the mix but Gallo-French is a bastardised mix of latin with Frankish and Norse.
French is unlike the other Romance languages
I always thought the word “Norman” meant “Northmen/Norsemen,” aka, Vikings. My dad’s YDNA traces to both Normandy and Northeastern Scotland, and the oldest lineage extends to the high northwestern coast of Norway. I always assumed that meant my ancestor traveled with Rollo to Northern Europe and then Scotland.