Being a teenager, even though I go to a Catholic school, many of my friends, and me sometimes occasionally swear. Nothing too terrible, but sometimes the occasion four-letter word. Some occasionally take The Lord’s name in vain, but not many and not too often. My main question is, if you are mad, and you take the Lord’s name in vain once or twice, is it a mortal sin? Also, do words such as “shut up” count as swears?
For the most part, what word may or may not be used in various contexts depends on culture. There are no particular words that are evil
per se to pronounce. Rather, it’s the meanings or effects of the words that may make them sinful to use in various situations.
For example, if I shouted “Oh my God, when I’m shocked, that would be disrespectful toward God, and thus evil. If, on the other hand, I say “Oh my God…” when beginning the Act of Contrition, I’m not disrespecting God, and thus, not sinning.
For many words, society has decided that because these words are strong, they are offensive. People will be generally offended in the US if you shout “f@@k”, but in other cultures it’s no big deal because not as much significance has been attached to it. The word “humbug” used to be considered profanity, yet people would probably laugh at you, rather than be offended, if you use it.
Basically, respect God and other human beings, and reflect that respect and consideration in your words. It is a sin to disrespect the Supreme Being. Also, avoid using words in correct contexts in your culture. Don’t use words that will offend others in your culture if you don’t need to.