Add language descriptor to wordpress adminbar

function.php

/*

Plugin Name: Language Descriptor for admin Bar

Plugin URI: http://kanedo.net

Description: Add language descriptor to wordpress adminbar 

Version: 1.0

Author: Gabriel Bretschner

Author URI: http://blog.kanedo.net

*/
function kanedo_add_language_to_blog_title(){
	global $wp_admin_bar;	
	foreach($wp_admin_bar->user->blogs as $blog){
	
		$lang = get_blog_option($blog->userblog_id, 'WPLANG');
		$language = "(EN)";
		switch($lang){
			case "de_DE":
				$language = "(DE)";
				break;
		}
		$wp_admin_bar->user->blogs[$blog->userblog_id]->blogname = $language." ".$wp_admin_bar->user->blogs[$blog->userblog_id]->blogname;
	}
}

add_action('admin_bar_menu', 'kanedo_add_language_to_blog_title');