From the rules.
Be respectful to other players
Don’t use extremely derogatory terms or epithets. Don’t insult or personally attack others in excess. If someone asks you to stop, then stop.
Don’t use excessive or extremely offensive profanity
Cursing is allowed in moderation, but don’t go overboard or get shockingly offensive with it. Staff will warn you if you’re crossing the line.
Practice good chat etiquette
Don’t use caps, don’t spam, don’t discuss controversial, sensitive or offensive topics (e.g. sex, sexual identity or preferences, race, politics, religion, drugs, etc.), no advertising, no links, no trolling. Please only use the minecraft font and English in global chat.
No hate speech in any form
Never engage in hate speech of any kind. This means chat, private message, in your builds, in books, your skin, signs, etc.