WOTLK English to Spanish

[Aikaru0]

Hello, I've been trying to change the language of the game to Spanish as many friends can't speak English and they want to play in a spare PC I've got. The "config" file in the WTF folder does not save the changes I do, it actually returns to the way it was before being modified. Is there any solution to this? Should I try to modify another file? I've already tried modifying the one in the "enUS" folder as a desperate means, but so far, no luck at all :/

[Zelta]

First of all, make sure your Config.wtf file is not read-only.
Then, generally, if you have run your client with another language, by only changing config.wtf it will not work, so that's what you need to do:
- Go to \Data and delete the language folder (enUS, enGB...)
- Go to Config.wtf and modify language line bits to esES
- Start your client

[Anyone0]

Changing language of wotlk client is not that simple. Cata and MoP download missing files automatically when changing language but wotlk doesn't. You need all the language files to change language and it might be easier to find Spanish wotlk client download than only required files.