Where does $LANG variable gets set in Mac OS X?

I've used wget for the first time after installing Lion OS X and I've noticed that wget got localized to my native language. Running set command in terminal showed that my LANG variable represents my local language. Where can I change this or make wget ignore this setting? *update* Here's what locale gives me: LANG="lt_LT.UTF-8" LC_COLLATE="lt_LT.UTF-8" LC_CTYPE="lt_LT.UTF-8" LC_MESSAGES="lt_LT.UTF-8" LC_MONETARY="lt_LT.UTF-8" LC_NUMERIC="lt_LT.UTF-8" LC_TIME="lt_LT.UTF-8" LC_ALL= Hence all the output of non-parameters (such as prompts and debug messages) are in Lithuanian. That is my problem. I'd like to get it back to English. I am using zsh as my login shell.