If you play on a French, German, Chinese or any other client then you can swap to English audio if you feel you prefer that.
You only need to make sure the enGB folder with the speech MPQ archive are there, then it will definitely work.
You need to use a console variable to turn this feature on or off (set it to either 0 or 1, not literally "[0-1]" like it says in the example):
Code:
/console useEnglishAudio [0-1]
You may also edit the .\WTF\Config.wtf file and add this to the bottom of the file:
Code:
SET useEnglishAudio "1"
If you don't get it to work, try restarting the game. If it still does not work make sure you got the .\Data\enGB folder with the sound archives inside. It can't load the English audio without the locales. You may get these from the account manager page, pick that you want to change to English locale and install the patch.
You can change the default locale of the game by simply doing this console command:
Code:
/console locale "enGB"
Where enGB is replaced with enUS, frFR, deDE and so on. You may yet again do this change by editing the .\WTF\Config.wtf file, simply find the "locale" line in the config and change the value.