This is my first mod idea, and I'm surprised no one has made one yet.
I'm not very good with modding, but I ask if it would be possible for someone to go through every line of dialogue in the game and censor the swear words to move it down to a PG language range. I'm not sure if it would be hard, but I think it would be interesting to see.
The swear words could be muted, bleeped, replaced, warped, or hidden by any other method of censorship.
You could do this easily if you are talking about FO1 and 2. I am not sure how FO3 dialogue looks in file format. All you would need to do is open up every MSG file and do a find and replace for all common swear words e.g. F**K can be found and replaced with Fudge etc. You would no doubt miss allot, but using this quick and dirt method you could do it in a couple of hours.
I have a suspicion you are talking about FO3 though.