That's easily complicated by the fact that the roots of the rivalry between France and England was in large part stoked by French-speaking Norman conquerors. Few native English speakers will read this paragraph and identify all these French-derived words as being 'French', since they have become such a plainly integral part of English:

complicate, fact, rivalry, part, conqueror, native, paragraph, identify, derive

TL;DR can't speak English without also speaking a bunch of French in the process, especially since French words represent all the elite, cultured words (e.g. 'cow' vs. 'beef')