First of all, parents should set an example.
When parents communicate with others outside, they must pay attention, because when they were children, parents were the best teachers. Now children are getting smarter and better at learning, so we should pay more attention to this, otherwise we will only regret it. Because of the long time, it is difficult for children to correct those bad habits, otherwise it will affect their lives.
example
Second, read similar books.
In children's spare time, we can accompany them to the library, or parents can teach them how to speak reasonably through their own learning methods, which is more convenient for them to accept. At the same time, when we tell these things to our children, we'd better combine cases to be vivid and let them get rid of such bad habits completely.
book
Third, watch related TV and movies.
Compared with knowledge in books, children will be more intuitive when watching TV or movies. At the same time, I think parents should also make some explanations, especially those points where children make mistakes, so that children can know what to say and what not to say.
TV
The above methods are the results of my experience and research. I hope they can help you, and I wish your babies a good growing environment and happiness every day.