FC in a team name means Football Club. You see it in names like Chelsea FC, FC Barcelona, or FC Bayern. It is not a secret code; it is an old, formal way of saying “this is a football club,” and it stuck as part of the name. In most of the world, including Taiwan, football here means the game with a round ball — what Americans call soccer. That matters, because in the United States “football” usually means American football, with helmets. Even so, when an American soccer team puts FC in its name, they still mean the round-ball game. Other clubs use United, City, Real, or Sporting instead; FC is only one common label. It is written in capitals. When people talk, they often drop it: they say “Barcelona,” not always “FC Barcelona.” You say the letters “F-C” when you do say them.