Blizzard or game account hacked or compromised.
Changing language settings for game and/or communications from Blizzard
How to move a game account to a different Blizzard account
You can change your BattleTag in Account Management.
How to consolidate multiple Blizzard accounts into a single account.
Steps on how to create a new Administrator Profile.
Information on using Diablo III Account Rollbacks after your account is hacked.
How the silence penalties work
How to move a Diablo III account off a Blizzard account
Playing Blizzard games on more than one platform.