Cant change the language (MOP)

Hello guys, today I download the game (MOP) and im trying to change it to other language but when I do it from inside the game nothing happens. So I unclicked the box in proprieties of config in WTF folder, and tried to change the language again. Now I cannot enter the game anymore.

Can someone explain to me please how to change the language in MOP? I would like to change it to italian, if there isnt any option, is there any link with italian language file?

Thank you very much.

the client download from warmane has only english.

When you try to select a different language in-game -> it tries to download the missing file from blizzard server BUT it is not longer possible

now, to be able to run the game, edit the config.wtf file (insdie WTF folder).
Open the file and set back this line, from:
SET locale "itIT"

to
SET locale "enGB"

try to look on google from a MoP intalian version (btw I would recommend to use english client)