Changing language settings for game and/or communications from Blizzard
Blizzard or game account hacked or compromised.
You can change your BattleTag in Account Management.
How to move a game account to a different Blizzard account
How to consolidate multiple Blizzard accounts into a single account.
How to move a Hearthstone account off a Blizzard account
If you forgot your Blizzard account email, you can use SMS Protect to find your account.
Change your Blizzard account email address.
Playing Blizzard games on more than one platform.
Information on the possibility of merging progress, purchases, and/or characters on separate game licenses