Account has been hacked or compromised.
Changing language settings for game and/or communications from Blizzard
How to move a game account to a different Blizzard account
Info article detailing how to turn off a network proxy.
Phishing scams can take many forms—fake websites, suspicious emails, and threatening in-game whispers are the most common types.
How to consolidate multiple Blizzard accounts into a single account.
Steps on how to create a new Administrator Profile.
Playing Blizzard games on more than one platform.
Information on Diablo III Account Rollbacks after your account is hacked.
How to move a Diablo III account off a Blizzard account