A French left-wing leader openly using the term "great replacement" is exposing how taboo the same idea remains in American politics.

• The French politician said he wants France to become less white and more "Creole," calling this shift the "great replacement" by name.
• In the United States, the same term is treated as a racist or antisemitic conspiracy theory, and public figures avoid saying it outright.
• The underlying claim — that the populations of historically white countries are shifting away from being majority white — is stated plainly in France while remaining unspeakable in the US.
• Anyone who brings up the idea in America risks being branded a conspiracy theorist, even though French politicians describe it openly as policy.

Outlook: Expect the remark to keep fueling arguments over immigration, national identity, and what language is allowed in public debate on both sides of the Atlantic.