if (requestLangs != null && requestLangs.length != 0) {
            return normalizeQueryLanguages(requestLangs);
        }

        if (locales == null) {
            return StringUtil.EMPTY_STRINGS;
        }

        return normalizeQueryLanguages(Collections.list(locales).stream().map(locale -> {
            final String language = locale.getLanguage();
            final String country = locale.getCountry();