public function menuLanguages(): ?Menu
    {
        $menu = new Menu(I18N::translate('Language'), '#', 'menu-language');

        foreach (I18N::activeLocales() as $locale) {
            $language_tag = $locale->languageTag();
            $class        = 'menu-language-' . $language_tag . (WT_LOCALE === $language_tag ? ' active' : '');
            $menu->addSubmenu(new Menu($locale->endonym(), '#', $class, [
                'onclick'       => 'return false;',
                'data-language' => $language_tag,
            ]));
        }

        if (count($menu->getSubmenus()) > 1) {
            return $menu;
        }

        return null;
    }