Can I mod my language locale?

Hi guys,

Just a low-priority question. If I modify my en_US, or whatever other folder to make a modified language option for the game client will it work?

Specifically I would like to modify quest text just for my client.

Quest text is sent to you by the server, so if you wanted to change what the quests say you should write an addon.

Thanks Shred for responding. I ended up finding this out by looking in the database files within my client. The profanity table was pretty funny.