[tekknik]

Spend any amount of time with an ESOL person and you’ll understand why. This is only an issue in primary english speaking countries. English is a complicated language to learn because of all these “rules” primary speakers make up that aren’t actually defined in the language. Also at what point is there a line? should we remove all words that a group of people find offensive? should the people finding the words offensive adjust their viewpoint? i’ve known people finding words like “petty” (as in petty officer) and even “sir”/“ma’am” offensive so should we also stop using those?

[Xylakant]

No, you're not required to avoid any word. You're free to use any word that you choose. You just have to accept the consequences. If you come to my house or my office and - despite being made aware that certain language is not welcome - use those words, you'll have to live with the fact that you're not welcome any more. That's what a CoC does - it points out the ground rules for expected behavior. Start swearing loudly in a church and you'll learn a thing or two about informal CoCs.