Hi gracey
My neice was encourages and taught to swear by my other brother in law, her uncle. She started at 4 years old,to get attention. Her mum did the old trick of putting soap in her mouth, it was a diluted liquid soap, but she has remembered it to this day, and knows that if she does it again she knows what will happen.
Milly's grandpa, my partners dad, never swore infront of the kids, even his mum would say bumholes or crotchless knickers if she wanted to swear (lol). But my mum is quite the opposite. Think that we'll just have to wait and see with her.
Cheers
Sally