Template talk:Bleeding and clotting disorders

US=Y?
An anonymous user keeps making edits like these on Hematology pages: https://en.wikipedia.org/w/index.php?title=Heparin-induced_thrombocytopenia&curid=1056911&diff=986185541&oldid=964644960&diffmode=source Can someone explain what adding "us=y" does to a category? Myoglobin (talk) 13:35, 30 October 2020 (UTC)
 * I think it's so the template can show the appropriate variant (haemophilia vs. hemophilia) depending on the ENGVAR of the Wikipedia article. --Tom (LT) (talk) 22:58, 1 November 2020 (UTC)