Soccer is an American word.
The most popular sport in the world is football - Americans call it soccer 'cus they got their own game called football, also I think Australians call it soccer 'cus they got their own game called football.
But, the fact remains that it is the most popular game in the world and the majority of the world call it football.
Maybe:
Quote: "Wait, when you say Football, do you mean Soccer or Rugby Leage?"
Should be re-phrased as:
Quote: "Wait, when you say Football, do you mean the game that we call soccer."