Their National Football Association.
yes, because they may not play, but they still train, but not as often
Footballers do not really play in winter.
there are more players because most people play footballers.
If you see "COUNTRY/PAYS" on, for example, a passport, it means "country." "Pays" is the French word for "country."
Footballers in England are people who play football. In the US, they might be called soccer players.
My country: mon pays - YOUR country: TON pays.