I don't remember any conversations about this when I was younger, but neither me or my older siblings ever swore in front of my parents. I remember going out with my siblings one day and being surprised that they swore quite a lot outside the family home.
I rarely swear and don't particularly like it. My teens tell me I'm old fashioned and that everybody does it. I pick them up on it on the fairly rare times that they do it. I think it's disrespectful, but wonder if I'm being unreasonable. What happens in your home?