Question - during the World Cup how do referees and players communicate with each other?

[sarisataka]

4. Having refereed a few international games

(Though far below the WC level) many players are also on teams in countries other than their home nation. It is not unusual for players to be able to communicate in 3-4 languages. I knew swear words in 11 different languages.

English/French/Spanish are very common on the field. The conversations may be using multiple languages at the same time with a 3rd player helping interpret but the meaning gets across.

80% of the conversations are along the lines:

Ref are you blind
I saw it.
But we are innocent; they are cheating.
I’ll make the calls, you play the game.