Gallo-Roman (adj.)

"belonging to Gaul when it was part of the Roman Empire," from combining form of Gaul + Roman. In reference to a language, and as a noun, the language spoken in France from the end of the fifth century C.E. to the middle of the ninth, a form of Vulgar Latin with local modifications and additions from Gaulish that then, in the region around Paris, developed into what linguists call Old French.