I seen a lot of people swearing
Swear words in any language should be censored.

It's actually tough to do that because some words that are swears in one language and not swear at all in another language. That said, we can probably do better in foreign lang swears.
I'll see what we can do!

what is more serious, a dirty word or defamation (public or private) and the gratuitous offense, which offends the dignity of the person and pays attention to the dignity of his personality? These, libel and free offense, are shameful!
This is not defamation. Nor anything close to it. He did not reveal the username of the person who said this.

I'm actually going to disagree on this. I am fluent in Castillian Spanish (Spanish from Spain, original Spanish) and the word "grab" is a word you use every single day in Spain. Not only that, but it is used for things like "hold on to", "get", "pick up" (in some instances), etc.
The thing about this is that in Latin-American Spanish, this is a bad word, and is never used. So when talking to about 75% of the Spanish-Speaking community I have to try to not use it and instead use a term that is uncommon in Spain. However, when I am talking to someone from Spain, I can use it. And since for some odd reason Castillian Spanish isn't as well known, I would be afraid of such word being censored. Like, @jdcannon pointed out, some words can be swear words in one language, and not in another (Or another version of that language). I just don't see how this would work out.
In my most recent blitz game, my opponent was typing in another language, and when I looked it up on Google Translate, it turns out that the person was swearing.