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How to change the language settings in your Blizzard games
How to move a game account to a different Blizzard account
How to attach an Authenticator to your Blizzard account
Information on banned game accounts.
What to do if you cannot see your recent BattleTag name change in-game
Information on the Blizzard Authenticator
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Information on Blizzard Phone Notifications
Change your Blizzard account email address.