When you ask for "a cup of coffee" in different countries, you may also get pretty surprised at what you get (it may be a tiny cup, or a large glass, sugary or bitter, with milk or without...).
not even just countries - my family from California visited NYC and kept getting frustrated when they said just wanted a "regular coffee," until someone finally realized they meant "black coffee" and it was racist to say black, so they had to order "plain coffee, no milk or sugar"