public function getDcMultilingualRootPageLanguages()
    {
        $pages = $this->framework->createInstance(Database::class)->execute("SELECT DISTINCT language FROM tl_page WHERE type='root' AND language!=''");
        $languages = $pages->fetchEach('language');

        array_walk(
            $languages,
            function (&$value) {
                $value = str_replace('-', '_', $value);
            }
        );

        return $languages;
    }