Respectfully, I think the inverse is true. A kid is going to use the words anyway, all you’re doing by trying to prevent them from using them is signaling that you aren’t a safe person for them to be themselves around.

Teaching my kid not to use certain words sometimes was easy and went something like this: “Some people (like grandpa and when you’re at school) don’t like to hear words like ‘fuck’, and it’s good to be nice to people, so if you aren’t sure whether someone wants to hear ‘fuck’ then try to avoid it.”