WoW: Change language - so it'll work
Changing the language in WoW has been easier than ever since switching to the new battle.net system. That's how it's done:
Change WoW language settings
You no longer have to manually download a language pack. The game is now doing this for you.
- Start the World of Warcraft game.
- Select "System" on the login screen.
- Now click on "Languages".
- After you have selected your preferred language, you can confirm with a click on "Ok".
- Now restart the game client. If the required language pack is not installed, the launcher will download it automatically.
Battle.net Launcher change language
It is even easier to change the language settings of the game launcher "Battle.net".
- Start the "Battle.net" launcher.
- Click the Battle.net logo in the upper left corner and select "Settings".
- Now select your preferred language in the right part of the window.
- Confirm the message with "Restart Now" or "Restart Now".
- After the launcher has restarted, the new language is already installed.
If you want to sell your WoW account, you will find useful tips here.