lang

gistfile1.txt

function custom_rewrite_rules(){
  global $langs; 
   //Array containing locale => pretty permalink key value pair
   /*
    $langs = array (
             'en_us' => 'en',
            )
   */

  foreach($langs as $locale => $lang) {
  add_rewrite_rule(
                   '^'.$lang.'/\/(.*)/?$',
                   'index.php?lang='.$locale,
                   'top'
                   );
  }

}
add_action( 'init', 'custom_rewrite_rules' );