Defense Secretary Pete Hegseth proudly and embarrassingly declared that he only "speaks American" while in a room filled with leaders from Latin America.
Fair enough point, I also see it in normal English usage for proper nouns but basically nowhere else.
Wikipedia agrees with you (and also calls out the New Yorker vehemently disagrees which I find oddly comforting and hilarious)
In British English this usage has been considered obsolete for many years, and in US English, although it persisted for longer, it is now considered archaic as well.[3] Nevertheless, it is still used by the US magazine The New Yorker.[4]
Fair enough point, I also see it in normal English usage for proper nouns but basically nowhere else.
Wikipedia agrees with you (and also calls out the New Yorker vehemently disagrees which I find oddly comforting and hilarious)