protected static function load()
    {
        $files = glob(root().'resources/translator/'.self::$lang.'/*.php');

        foreach ($files as $file) {
            $words = need($file);

            // get file name
            $filename = explode('resources/translator/'.self::$lang.'/', $file);
            $filename = $filename[1];
            $filename = explode('.php', $filename);
            $filename = $filename[0];

            foreach ($words as $key => $value) {
                if ($filename == self::$lang) {
                    self::$words[$key] = $value;
                } else {
                    self::$words[$filename][$key] = $value;
                }
            }
        }
    }