/**
* Sets a language value by key
*
* @param mixed $key The key to define
* @param mixed $value The value for the passed key
*/
static function set($key, $value = null)
{
if (is_array($key)) {
self::$lang = array_merge(self::$lang, $key);
} else {
self::$lang[$key] = $value;
}
}
