The Gallo-Romance group in the north of France, the langue d'oïl like Picard, Walloon, and Francien, were influenced by the Germanic languages spoken by the Frankish invaders.
From the 4th to 7th centuries, Brythonic-speaking peoples from Cornwall, Devon, and Wales travelled across the English Channel, both for reasons of trade and of flight from the Anglo-Saxon invasions of England.