I take a biblical approach to swear words: It is swearing if you say “I swear to God that I will xxxx”. This is against God’s law as sweating oaths on God’s holy name should only be done in a court or for some serious life event like marriage. Fuc$ and Hell and shi? do not even come close to this definition of swearing.
One of Paul’s letters discusses using impure speech I believe, but that doesn’t seem as explicit as the mention in the Ten Commandments.
Yes I try not to day GD or JC which is really bad. The rest of it if you leave God out I doubt he cares.