private function getPosixLocale(Language $language): ?array
    {
        if (!$language->enabled) {
            return null;
        }

        $posixLocale = $this->localeConverter->convertToPOSIX($language->languageCode);
        if ($posixLocale === null) {
            return null;
        }

        if (!Locales::exists($posixLocale)) {
            return null;
        }

        return [$posixLocale, Locales::getName($posixLocale)];
    }