International football communicating

so, when Zeldane and the italian were exchanging insults, what language did they speak?

When two players on teams with diffent mother tongues talk to each other, what language do they speak?

How do a saudi and korean exchange insults?
Or a Turk and a Swede?
Or an Argentinian and an Iranian?

Does everybody in world football speaka de english or what??

French and Italian both are Latin root languages. Most Europeans speak multiple languages as well. Also, I can insult people in more than a dozen languages, and say a toast in even more. I doubt I am all that unusual.