That makes me smile, people used to say Jackie Chan was the Hong Kong Buster Keaton.

Jackie Chan once credited Buster Keaton as an influence on his own acting and film making, which, in my book, makes him a cultural-epochal appropriator. Late 20th century Hong Kong film actors must not be allowed to imitate or mock early 20th century Hollywood silent film actors.

Progress gets made by people imitating what other people do and then modifying it. If this gets labeled as cultural appropriation then we should just stop any kind of progress. I am sure Keaton got his inspiration from predecessors so he is probably an appropriator too.