Note: If you have the AMERICAN version of the game follow this:
1st step: go to C:\Program Files\WoW\Data
2nd step: Duplicate the folder enUS so you have "enUS" and "copy of enUS"
3rd step: Rename the folder "copy of enUS" to "enGB"
4th step: Go into the folder "enGB" and change the realmlist to
set realmlist eu.logon.worldofwarcraft.com
set patchlist eu.version.worldofwarcraft.com
set portal eu
5th step: rename all files what end in -enUS.MPQ to -enGB.MPQ
If you want to play on US Servers again you will have to reverse from 5-1
Note: If you have the EUROPEAN version of the game follow this:
1st step: go to C:\Program Files\WoW\Data
2nd step: Duplicate the folder enGB so you have "enGB" and "copy of enGB"
3rd step: Rename the folder "copy of enGB" to "enUS"
4th step: Go into the folder "enUS" and change the realmlist to
set realmlist us.logon.worldofwarcraft.com
set patchlist us.version.worldofwarcraft.com
set portal us
5th step: rename all files what end in -enGB.MPQ to -enUS.MPQ
If you want to play on EU Servers again you will have to reverse from 5-1
This worked for me and should work for you,
make sure you did all steps ^^