Manchester City's senior players are working with Mario Balotelli to help him adjust to the Premier League.
De Jong has revealed that some of the senior players have spoken to Balotelli and told him to keep his temper under control.
De Jong told the Manchester Evening News: "When you are on a yellow card you have to watch yourself, especially in an away game.
"He needs to learn from it and stay focused on his football and not talk too much.
"If it is me, Carlos (Tevez) or Vinny (Vincent Kompany) we always try to tell him he has to stop talking and concentrate on his game.
"But it is not easy for him. He is 20 and has come into the Premier League from Italy, which is a different game for him.
"He knows now what happens and that you can leave your team-mates at a disadvantage because you end up playing with 10 men."