It is rare that a manufacturer would make a country specific language marking on a part, especially on one that requires tooling, like the QR. It is just too hard to track inventory to get the right part to the right country.
When Campy did change things for the US market, like the curved QR levers, rounded brake QRs, covers for RD adjustment screws that came from US CPSC rules in the 70’s they did it globally. Bet when LOCKED was added to the QR, it happened everywhere.