public function getCurrentLocaleRegional()
    {
        // need to check if it exists, since 'regional' has been added
        // after version 1.0.11 and existing users will not have it
        if (isset($this->supportedLocales[$this->getCurrentLocale()]['regional'])) {
            return $this->supportedLocales[$this->getCurrentLocale()]['regional'];
        } else {
            return;
        }
    }