You can’t let your kids live in a bubble. Eventually, it will be popped by something beyond your control and they will have to deal with the outside world. If your children need to walk around with a fainting couch, just in case they hear someone use a bad word, you have failed as a parent.
Better to introduce the outside world to them on your own terms. This takes discipline, wisdom, and patience. Not easy, but doable, as long as you don’t mind doing it imperfectly.