Use different languages in admin and front-end

Hello,

I’d like to set up a site that use a different language/locale for the admin and the front end (admin in English, blog posts in Dutch) but do not know how to do this.

What i have so far is :
– Set WPLANG as ‘en_US’ in wp-config
– place the nl_NL.mo file in wp-content/languages/
– add a filter in my theme functions.php to change the locale (see code below)

If I check the local as returned by get_locale(), this filter does work… but the localized string are still in english.

Any idea how to fix this ?

code:

function locale_for_blog( $locale ) {
   return is_admin()? $locale : 'nl_NL';
}

add_filter('locale', 'locale_for_blog');