Here is a little patch to implement different languages for admin and content parts of blog.
Just change file “wp-includes/l10n.php”
Find function “get_locale” and make changes as shown below.
function get_locale() {
global $locale;
if (isset($locale))
return apply_filters( 'locale', $locale );
// WPLANG is defined in wp-config.
if (defined('WPLANG'))
$locale = WPLANG;
if (empty($locale))
$locale = 'en_US';
//!!!!Add this to function
if (is_admin())
$locale = 'en_US';
//!!end of changes
return apply_filters('locale', $locale);
}
you can change $locale = ‘en_US’; to any language you want.
And don’t forget to check this after every update. It can be rewritten automatically by wordpress