I learned very, very quickly with my eldest daughter not to use the words that I didn't want her to use. I try to use as positive language as possible with my girls because it's the most effective in disciplining them and getting them to perform the behaviors and actions that I prefer. But it also sets a tone for my children to use more positive language.
I had to really, really curb my usage of the word "no" around my kids. The less I used it, and even now that they're older, the less they use it. I still have to catch myself sometimes because it's just so much easier for me to say, "No, end of story." However, it's much more effective for me to expand my responses to something like, "We don't _____." "Mommy doesn't like it when you _____." "Let's go over here and play with ____ because this isn't working out for us." "I don't think this is a good idea. Let's try ____ instead." This way you're not just redirecting, but you're redirecting with purpose and discipline.