diff --git a/src/main/java/org/codelibs/fess/Constants.java b/src/main/java/org/codelibs/fess/Constants.java
index 36c5aaf39..42429f261 100644
--- a/src/main/java/org/codelibs/fess/Constants.java
+++ b/src/main/java/org/codelibs/fess/Constants.java
@@ -372,4 +372,6 @@ public class Constants extends CoreLibConstants {
     public static final String MAPPING_TYPE_DOUBLE = "double";
 
     public static final String PAGING_QUERY_LIST = "pagingQueryList";
+
+    public static final String REQUEST_LANGUAGES = "requestLanguages";
 }
diff --git a/src/main/java/org/codelibs/fess/app/service/WebConfigService.java b/src/main/java/org/codelibs/fess/app/service/WebConfigService.java
index 494a7a9e1..e5f1bb979 100644
--- a/src/main/java/org/codelibs/fess/app/service/WebConfigService.java
+++ b/src/main/java/org/codelibs/fess/app/service/WebConfigService.java
@@ -24,7 +24,6 @@ import javax.annotation.Resource;
 import org.codelibs.core.beans.util.BeanUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.app.pager.WebConfigPager;
-import org.codelibs.fess.es.config.bsbhv.BsWebConfigBhv;
 import org.codelibs.fess.es.config.cbean.WebConfigCB;
 import org.codelibs.fess.es.config.exbhv.WebAuthenticationBhv;
 import org.codelibs.fess.es.config.exbhv.WebConfigBhv;
diff --git a/src/main/java/org/codelibs/fess/app/web/search/SearchAction.java b/src/main/java/org/codelibs/fess/app/web/search/SearchAction.java
index 7fe291541..4afaaf8d3 100644
--- a/src/main/java/org/codelibs/fess/app/web/search/SearchAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/search/SearchAction.java
@@ -121,6 +121,7 @@ public class SearchAction extends FessSearchAction {
             updateSearchParams(form);
             buildLabelParams(form.fields);
             form.lang = searchService.getLanguages(request, form);
+            request.setAttribute(Constants.REQUEST_LANGUAGES, form.lang);
             final WebRenderData renderData = new WebRenderData();
             searchService.search(request, form, renderData);
             return asHtml(path_SearchJsp).renderWith(data -> {
diff --git a/src/main/java/org/codelibs/fess/helper/QueryHelper.java b/src/main/java/org/codelibs/fess/helper/QueryHelper.java
index 2f7b222c7..5294855ac 100644
--- a/src/main/java/org/codelibs/fess/helper/QueryHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/QueryHelper.java
@@ -54,7 +54,6 @@ import org.codelibs.fess.entity.QueryContext;
 import org.codelibs.fess.exception.InvalidQueryException;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.util.StreamUtil;
-import org.dbflute.optional.OptionalEntity;
 import org.dbflute.optional.OptionalThing;
 import org.elasticsearch.common.unit.Fuzziness;
 import org.elasticsearch.index.query.BoolQueryBuilder;
@@ -467,16 +466,19 @@ public class QueryHelper implements Serializable {
         final QueryBuilder contentQuery =
                 builder.apply(fessConfig.getIndexFieldContent(), fessConfig.getQueryBoostContentAsDecimal().floatValue());
         boolQuery.should(contentQuery);
-        getQueryLanguage().ifPresent(
-                lang -> {
-                    final QueryBuilder titleLangQuery =
-                            builder.apply(fessConfig.getIndexFieldTitle() + "_" + lang, fessConfig.getQueryBoostTitleLangAsDecimal()
-                                    .floatValue());
-                    boolQuery.should(titleLangQuery);
-                    final QueryBuilder contentLangQuery =
-                            builder.apply(fessConfig.getIndexFieldContent() + "_" + lang, fessConfig.getQueryBoostContentLangAsDecimal()
-                                    .floatValue());
-                    boolQuery.should(contentLangQuery);
+        getQueryLanguages().ifPresent(
+                langs -> {
+                    StreamUtil.of(langs).forEach(
+                            lang -> {
+                                final QueryBuilder titleLangQuery =
+                                        builder.apply(fessConfig.getIndexFieldTitle() + "_" + lang, fessConfig
+                                                .getQueryBoostTitleLangAsDecimal().floatValue());
+                                boolQuery.should(titleLangQuery);
+                                final QueryBuilder contentLangQuery =
+                                        builder.apply(fessConfig.getIndexFieldContent() + "_" + lang, fessConfig
+                                                .getQueryBoostContentLangAsDecimal().floatValue());
+                                boolQuery.should(contentLangQuery);
+                            });
                 });
         return boolQuery;
     }
@@ -485,12 +487,10 @@ public class QueryHelper implements Serializable {
         QueryBuilder apply(String field, float boost);
     }
 
-    protected OptionalThing<String> getQueryLanguage() {
-        if (StringUtil.isNotBlank(fessConfig.getQueryDefaultLanguage())) {
-            return OptionalEntity.of(fessConfig.getQueryDefaultLanguage());
-        }
-        return LaRequestUtil.getOptionalRequest().map(request -> fessConfig.getQueryLanguage(request.getLocale()));
-
+    protected OptionalThing<String[]> getQueryLanguages() {
+        return LaRequestUtil.getOptionalRequest()
+                .map(request -> fessConfig.getQueryLanguages(request.getLocales(),
+                        (String[]) request.getAttribute(Constants.REQUEST_LANGUAGES)));
     }
 
     private boolean isSortField(final String field) {
diff --git a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
index af3a23c09..af5550382 100644
--- a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
+++ b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
@@ -318,7 +318,7 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
     String QUERY_REPLACE_TERM_WITH_PREFIX_QUERY = "query.replace.term.with.prefix.query";
 
     /** The key of the configuration. e.g.  */
-    String QUERY_DEFAULT_LANGUAGE = "query.default.language";
+    String QUERY_DEFAULT_LANGUAGES = "query.default.languages";
 
     /** The key of the configuration. e.g. ar=ar
     bg=bg
@@ -1578,19 +1578,19 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
     boolean isQueryReplaceTermWithPrefixQuery();
 
     /**
-     * Get the value for the key 'query.default.language'. <br>
+     * Get the value for the key 'query.default.languages'. <br>
      * The value is, e.g.  <br>
      * @return The value of found property. (NotNull: if not found, exception but basically no way)
      */
-    String getQueryDefaultLanguage();
+    String getQueryDefaultLanguages();
 
     /**
-     * Get the value for the key 'query.default.language' as {@link Integer}. <br>
+     * Get the value for the key 'query.default.languages' as {@link Integer}. <br>
      * The value is, e.g.  <br>
      * @return The value of found property. (NotNull: if not found, exception but basically no way)
      * @throws NumberFormatException When the property is not integer.
      */
-    Integer getQueryDefaultLanguageAsInteger();
+    Integer getQueryDefaultLanguagesAsInteger();
 
     /**
      * Get the value for the key 'query.language.mapping'. <br>
@@ -3202,12 +3202,12 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
             return is(FessConfig.QUERY_REPLACE_TERM_WITH_PREFIX_QUERY);
         }
 
-        public String getQueryDefaultLanguage() {
-            return get(FessConfig.QUERY_DEFAULT_LANGUAGE);
+        public String getQueryDefaultLanguages() {
+            return get(FessConfig.QUERY_DEFAULT_LANGUAGES);
         }
 
-        public Integer getQueryDefaultLanguageAsInteger() {
-            return getAsInteger(FessConfig.QUERY_DEFAULT_LANGUAGE);
+        public Integer getQueryDefaultLanguagesAsInteger() {
+            return getAsInteger(FessConfig.QUERY_DEFAULT_LANGUAGES);
         }
 
         public String getQueryLanguageMapping() {
diff --git a/src/main/java/org/codelibs/fess/mylasta/direction/FessProp.java b/src/main/java/org/codelibs/fess/mylasta/direction/FessProp.java
index f8e02e3ef..70626eec7 100644
--- a/src/main/java/org/codelibs/fess/mylasta/direction/FessProp.java
+++ b/src/main/java/org/codelibs/fess/mylasta/direction/FessProp.java
@@ -15,6 +15,8 @@
  */
 package org.codelibs.fess.mylasta.direction;
 
+import java.util.Collections;
+import java.util.Enumeration;
 import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -23,6 +25,7 @@ import java.util.stream.Collectors;
 
 import javax.naming.directory.Attribute;
 import javax.naming.directory.BasicAttribute;
+import javax.servlet.http.HttpServletRequest;
 
 import org.codelibs.core.exception.ClassNotFoundRuntimeException;
 import org.codelibs.core.lang.StringUtil;
@@ -380,12 +383,29 @@ public interface FessProp {
         return Boolean.valueOf(getQueryReplaceTermWithPrefixQuery());
     }
 
+    String getQueryDefaultLanguages();
+
     String getQueryLanguageMapping();
 
-    public default String getQueryLanguage(final Locale locale) {
-        if (locale == null) {
-            return null;
+    public default String[] getQueryLanguages(final Enumeration<Locale> locales, final String[] requestLangs) {
+        if (StringUtil.isNotBlank(getQueryDefaultLanguages())) {
+            String[] langs = (String[]) propMap.get("queryDefaultLanguages");
+            if (langs == null) {
+                langs = StreamUtil.of(getQueryDefaultLanguages().split(",")).map(s -> s.trim()).toArray(n -> new String[n]);
+                propMap.put("queryDefaultLanguages", langs);
+
+            }
+            return langs;
         }
+
+        if (requestLangs != null && requestLangs.length != 0) {
+            return requestLangs;
+        }
+
+        if (locales == null) {
+            return StringUtil.EMPTY_STRINGS;
+        }
+
         @SuppressWarnings("unchecked")
         Map<String, String> params = (Map<String, String>) propMap.get(QUERY_LANGUAGE_MAPPING);
         if (params == null) {
@@ -399,20 +419,23 @@ public interface FessProp {
             propMap.put(QUERY_LANGUAGE_MAPPING, params);
         }
 
-        final String language = locale.getLanguage();
-        final String country = locale.getCountry();
-        if (StringUtil.isNotBlank(language)) {
-            if (StringUtil.isNotBlank(country)) {
-                final String lang = language.toLowerCase(Locale.ROOT) + "-" + country.toLowerCase(Locale.ROOT);
-                if (params.containsKey(lang)) {
-                    return params.get(lang);
+        final Map<String, String> mapping = params;
+        return Collections.list(locales).stream().map(locale -> {
+            final String language = locale.getLanguage();
+            final String country = locale.getCountry();
+            if (StringUtil.isNotBlank(language)) {
+                if (StringUtil.isNotBlank(country)) {
+                    final String lang = language.toLowerCase(Locale.ROOT) + "-" + country.toLowerCase(Locale.ROOT);
+                    if (mapping.containsKey(lang)) {
+                        return mapping.get(lang);
+                    }
+                }
+                if (mapping.containsKey(language)) {
+                    return mapping.get(language);
                 }
             }
-            if (params.containsKey(language)) {
-                return params.get(language);
-            }
-        }
-        return null;
+            return null;
+        }).filter(l -> l != null).distinct().toArray(n -> new String[n]);
     }
 
     String getSupportedUploadedFiles();
@@ -524,4 +547,5 @@ public interface FessProp {
     public default boolean isValidCrawlerFileProtocol(final String url) {
         return StreamUtil.of(getCrawlerFileProtocolsAsArray()).anyMatch(s -> url.startsWith(s));
     }
+
 }
diff --git a/src/main/resources/fess_config.properties b/src/main/resources/fess_config.properties
index 39c973887..e02c213cb 100644
--- a/src/main/resources/fess_config.properties
+++ b/src/main/resources/fess_config.properties
@@ -154,7 +154,7 @@ index.document.type=doc
 # query
 query.max.length=1000
 query.replace.term.with.prefix.query=true
-query.default.language=
+query.default.languages=
 query.language.mapping=\
 ar=ar\n\
 bg=bg\n\
diff --git a/src/test/java/org/codelibs/fess/validation/UriTypeValidatorTest.java b/src/test/java/org/codelibs/fess/validation/UriTypeValidatorTest.java
index 73f2041ef..4dee7fb94 100644
--- a/src/test/java/org/codelibs/fess/validation/UriTypeValidatorTest.java
+++ b/src/test/java/org/codelibs/fess/validation/UriTypeValidatorTest.java
@@ -16,7 +16,6 @@
 package org.codelibs.fess.validation;
 
 import org.codelibs.fess.unit.UnitFessTestCase;
-import org.codelibs.fess.validation.UriTypeValidator;
 
 public class UriTypeValidatorTest extends UnitFessTestCase {
     public void test_check_ok() {