Your father wanted to Make Westeros Great Again. Cersei just hates foreigners.

...that Chicago Dog Sauce is both a terrible name for ketchup and the strangest ploy to get Chicago hot dog purists (which is like old lady Hummel figurine collectors and dudes who collect sports tattoos in the precious category) to use a condiment in history.  They could’ve called it “Ketchup for Morons” and it would’ve been more honest.