I have not checked yet. However, you will want to read the Game Code of Conduct which prohibits profanity.
The game content made by Devs is rated by the board as M. Content created by players (names and chat) has to abide by the Code of Conduct which is very PG.
Blizzard games offer a fun and safe place to interact with one another across various game worlds. We encourage our players to cooperate and compete in our games, but crossing the line into abuse is never acceptable. If you come across a player violating the policies below, you should report them.
Communication
When participating in communication of any kind (chat, voice communication, group finder), you are responsible for how you express yourself. You may not use language that could be offensive or vulgar to others.
Hate speech and discriminatory language is inappropriate, as is any obscene or disruptive language. Threatening or harassing another player is always unacceptable, regardless of language used. Violating any of these expectations will result in account restrictions. More serious and repeated violations will result in greater restrictions.
Naming
Names are subject to the same rules established above. Any name the player has the ability to customize—such as player names, BattleTags, and guild names—must be appropriate and inoffensive. Any name that violates our standards or disrupts the community will be changed, and additional limitations may be placed on the offending account per our discretion.
Take note that acceptable names are determined by player reports and Blizzard’s decision, and role-playing servers may have distinct standards for using game-appropriate names.
Cheating
You are responsible for how you and your account are represented in the game world. Cheating in any fashion will result in immediate action. Using third-party programs to automate any facet of the game, exploiting bugs, or engaging in any activity that grants an unfair advantage is considered cheating.
Exploiting other players is an equally serious offense. Scamming, account sharing, win-trading, and anything else that may degrade the gaming experience for other players will receive harsh penalties.
Behavior
Behavior that intentionally detracts from others’ enjoyment (such as griefing, throwing, feeding, etc.) is unacceptable. We expect our players to treat each other with respect and promote an enjoyable environment. Acceptable behavior is determined by player reports and Blizzard’s decision, and violating these guidelines will result in account and gameplay restrictions.
While we encourage you to report players that are behaving in a disrespectful manner, falsely reporting another player with the sole intent of restricting their gameplay is also unacceptable and will result in penalties to your account.
If you’re unsure if your actions violate this code of conduct, reconsider them. We reserve the right to restrict offending accounts as much as necessary to keep Blizzard games a fun experience for all players.
To report violations of the terms you can right click report in game.