My first guess was that Flanderization might mean the process where a region’s capital city outgrows the region and becomes culturally an entirely separate enti

My first guess was that Flanderization might mean the process where a region’s capital city outgrows the region and becomes culturally an entirely separate entity, as in the Belgian region of Flanders whose capital is Brussels and its inhabitants mostly don’t identify as Flemish. Usage example: “London is undergoing strong Flanderization accelerated by Brexit.” Turns out the Wikipedia definition is something pretty different!