I laud the attempt and I think it's important there are more projects that try to compete with their American counterparts. I do want to gently note that if your entire pitch is "we are a bold, independent European alternative that liberates you from the hegemony of the established American players," maybe don't name your product the exact same thing as the product you're replacing? "Office." They named it "Office."
Something like "EuropaOffice" would have followed the historical pattern so it's specifically the lack of an additional qualifier word that's perhaps questionable, not the word "Office."
But it does look like it's always called "Office.EU" in branding so maybe that's enough?