It may be that people around the child say that the child likes to imitate. It is much better to keep him away from these people and try to use civilized language in front of the child, or take the child to a better early education center for monitoring and correction. My children used to occasionally say that they were too busy at work and didn't have much time because they didn't listen to people. Later, I reported the children to Shiqiao Huaxia Baby-friendly Early Education Center, which is quite good now.