return language.toLowerCase(Locale.ROOT) + "-" + country.toLowerCase(Locale.ROOT);
                }
                return language.toLowerCase(Locale.ROOT);
            }
            return null;
        }).toArray(n -> new String[n]));
    }

    default Locale getQueryLocaleFromName(final String name) {
        if (name == null) {
            return Locale.ROOT;
        }

     ...

                        final String lowerGroupDn = fessConfig.getLdapAdminGroupBaseDn().toLowerCase(Locale.ROOT);
                        final String lowerRoleDn = fessConfig.getLdapAdminRoleBaseDn().toLowerCase(Locale.ROOT);
                        processSearchRoles(result, (entryDn, name) -> {
                            final String lowerEntryDn = entryDn.toLowerCase(Locale.ROOT);
                            if (lowerEntryDn.indexOf(lowerGroupDn) != -1) {

        }

        @Override
        public Object getAttribute(final String name) {
            return request.getAttribute(name);
        }

        @Override
        public Locale getLocale() {
            return Locale.ROOT;
        }

        @Override
        public SearchRequestType getType() {
            return SearchRequestType.JSON;
        }

        @Override