I never got the hang of this kind of myopic, senseless traditionalism. If Latin didn't let himself be bastardised with the influences of Frankish and Gaulish there wouldn't be any French.
And there's not much Gaulish influence in French, here is the full (and small) list of words originating from Gaulish: https://fr.wiktionary.org/wiki/Cat%C3%A9gorie:Mots_en_fran%C...
I think the EU will always be a mere bureaucratic administration unless all European citizens speak the same language. I can’t really think of any serious alternative to English, that’s by an order of magnitude the only real common denominator. For that, French, but also Dutch, German, Spanish, etc must all disappear as languages. And we should be ruthless. French only became the language of France because that country got ruthless with regional languages (patois).