Well, in every game my F2 Key is messed up so I can't use it, there is no way to change your chat keys in-game, is there a way to enter the files and change it? Because I've done that in other games and it has worked.
If so, which file do you go to?
You can change keys in the main menu of the game.
You click options (in pic number 2)
now go KEYBOARD
in number 1 on top, 4 in a row
now just search what feature has f2 and click on it and a key you want to use instead f2 and click apply