After defeat at Getafe, Koeman admitted he had complained to his counterpart Jose Bordalas about the abuse he copped from Nyom during the game.
Catalunya Ràdio's 'El Club de la Mitjanit' revealed that Nyom's insults to the Barça coach were, "son of a b***h" and "go f*** yourself"".
It's suggested there's room in the LaLiga's rule book for Barca to make a complaint against Nyom and demand a suspension.
After the win, Bordalas commented: "Tomorrow I will speak with Nyom. I doubt that he said that because I do not allow bad behavior."