From Longman Dictionary of Contemporary EnglishFranco-Franco- /fræŋkəʊ $ -koʊ/ prefix [in nouns and adjectives] 1 SANrelating to France a Francophile (=someone who loves France)2 SANFrench and something else the Franco-Belgian border
Examples from the Corpus
Franco-• a Franco-German proposalOrigin Franco- Medieval Latin Francus “Frenchman” 