Under such circumstances, she should first consider the feelings of herself and her friends and try not to criticize her boyfriend's way of speaking in the group. You can privately chat with friends to tell them your thoughts and feelings and suggest that they solve the problem through communication. If the boyfriend's behavior did violate the rules of the game or hurt the feelings of his friends, he could consider reporting it to the group administrator or leaving the Group chats. In novels, this method of solving problems through private conversations was more common to avoid unnecessary conflicts and conflicts in public.