Does changing ‘WPLANG’ in wp-config.php just effect the admin language or does it have other consequences?

I am curious to know if setting ‘WPLANG’ in wp-config.php just effects the admin language or does it have other consequences?

I run a blog in a foreign language but use English in my admin. I initially set the WPLANG to the foreign language a while ago and used a plugin (admin in English) to keep the English admin interface whilst using an .mo file to translate the theme.

I now use ‘WPML’ to manage the translations. I was wondering whether my WPLANG setting is still relevant and what it really means to the site?

Thanks

WPLANG effects the whole site not just the admin section, you can use it in conjunction with WPML. It basically sets what language you have translations for but you must include a languages folder inside wp-include with the appropriate .mo and .po files.

You can also set WPML to use the default languages directory ( which is set up by defining the language(s) in wp-config as I said above).