return StringUtil.EMPTY_STRINGS;
        }

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

     */
    protected String getLanguageInstruction() {
        final Locale locale = getUserLocale();
        final String language = locale.getLanguage();
        if ("en".equals(language)) {
            return StringUtil.EMPTY;
        }
        return "IMPORTANT: You MUST respond in " + locale.getDisplayLanguage(Locale.ENGLISH) + ".";
    }

    /**

        assertEquals(0, item.getTags().length);
        assertNotNull(item.getRoles());
        assertEquals(1, item.getRoles().length); // Default role is added
        assertNotNull(item.getLanguages());
        assertEquals(0, item.getLanguages().length);
        assertNotNull(item.getKinds());
        assertEquals(1, item.getKinds().length);
        assertEquals(SuggestItem.Kind.DOCUMENT, item.getKinds()[0]);
    }

    @Test

    }

    // Test getLanguages method
    @Test
    public void test_getLanguages_fromParams() {
        SearchRequestParams params = createMockSearchRequestParams();
        ((MockSearchRequestParams) params).setLanguages(new String[] { "en", "ja" });

        try {
            String[] languages = searchHelper.getLanguages(getMockRequest(), params);

            assertNotNull(languages);

        }

        map.put(FieldNames.FIELDS, item.getFields());
        map.put(FieldNames.TAGS, item.getTags());
        map.put(FieldNames.ROLES, item.getRoles());
        map.put(FieldNames.LANGUAGES, item.getLanguages());
        map.put(FieldNames.KINDS, Stream.of(item.getKinds()).map(SuggestItem.Kind::toString).toArray());
        map.put(FieldNames.QUERY_FREQ, item.getQueryFreq());
        map.put(FieldNames.DOC_FREQ, item.getDocFreq());

        mergedItem.setFields(mergeStringArrays(item1.getFields(), item2.getFields()));
        mergedItem.setTags(mergeStringArrays(item1.getTags(), item2.getTags()));
        mergedItem.setLanguages(mergeStringArrays(item1.getLanguages(), item2.getLanguages()));
        mergedItem.setRoles(mergeStringArrays(item1.getRoles(), item2.getRoles()));

        // Merge kinds
        mergedItem.setKinds(mergeKinds(item1.getKinds(), item2.getKinds()));

        assertTrue(items.size() > 0);
        SuggestItem item = items.get(0);
        assertTrue("Should have language", item.getLanguages().length > 0);
        assertEquals("ja", item.getLanguages()[0]);
    }

    @Test
    public void test_parseDocument_withNullLanguage() throws Exception {
        Map<String, Object> document = new HashMap<>();

     */
    public String[] getLanguages(final HttpServletRequest request, final SearchRequestParams params) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        if (params.getLanguages() != null) {
            final Set<String> langSet = new HashSet<>();
            for (final String lang : params.getLanguages()) {

            }

            @Override
            public Map<String, String[]> getConditions() {
                return conditions;
            }

            @Override
            public String[] getLanguages() {
                return null;
            }

            @Override
            public GeoInfo getGeoInfo() {
                return null;
            }

            @Override

            if (virtualHost != null) {
                tags.add(virtualHost);
            }

            if (sb.length() > 0) {
                final String[] langs = searchLog.getLanguages() == null ? new String[] {} : searchLog.getLanguages().split(",");
                stream(searchLog.getRoles()).of(stream -> stream.forEach(role -> roles.add(role)));