public static function update_translation()
 {
     global $tmp_dir, $globalDebug;
     $error = '';
     if ($globalDebug) {
         echo "Translation : Download...";
     }
     update_db::download('http://www.acarsd.org/download/translation.php', $tmp_dir . 'translation.zip');
     if (file_exists($tmp_dir . 'translation.zip')) {
         if ($globalDebug) {
             echo "Unzip...";
         }
         update_db::unzip($tmp_dir . 'translation.zip');
         if ($globalDebug) {
             echo "Add to DB...";
         }
         $error = update_db::translation();
     } else {
         $error = "File " . $tmp_dir . 'translation.zip' . " doesn't exist. Download failed.";
     }
     if ($error != '') {
         echo $error;
         exit;
     } elseif ($globalDebug) {
         echo "Done\n";
     }
 }