diff --git a/src/search_renderer.cpp b/src/search_renderer.cpp
index 8d2fc12b..f80a0f9e 100644
--- a/src/search_renderer.cpp
+++ b/src/search_renderer.cpp
@@ -87,6 +87,16 @@ void SearchRenderer::setSearchProtocolPrefix(const std::string& prefix)
   this->searchProtocolPrefix = prefix;
 }
 
+std::string extractValueFromQuery(const std::string& query, const std::string& key) {
+  const std::string p = key + "=";
+  const size_t i = query.find(p);
+  if (i == std::string::npos) {
+    return "";
+  }
+  std::string r = query.substr(i + p.size());
+  return r.substr(0, r.find("&"));
+}
+
 kainjow::mustache::data buildQueryData
 (
   const std::string& searchProtocolPrefix,
@@ -99,6 +109,10 @@ kainjow::mustache::data buildQueryData
   ss << searchProtocolPrefix << "?pattern=" << urlEncode(pattern, true);
   ss << "&" << bookQuery;
   query.set("unpaginatedQuery", ss.str());
+  auto lang = extractValueFromQuery(bookQuery, "books.filter.lang");
+  if(!lang.empty()) {
+    query.set("lang", lang);
+  }
   return query;
 }
 
diff --git a/test/server_xml_search.cpp b/test/server_xml_search.cpp
index 67942157..1f3568fb 100644
--- a/test/server_xml_search.cpp
+++ b/test/server_xml_search.cpp
@@ -499,14 +499,27 @@ TEST_F(TaskbarlessServerTest, searchResults)
       return url;
     }
 
-    std::string getPattern() const
+    std::string extractQueryValue(const std::string& key) const
     {
-      const std::string p = "pattern=";
+      const std::string p = key + "=";
       const size_t i = query.find(p);
+      if (i == std::string::npos) {
+        return "";
+      }
       std::string r = query.substr(i + p.size());
       return r.substr(0, r.find("&"));
     }
 
+    std::string getPattern() const
+    {
+      return extractQueryValue("pattern");
+    }
+
+    std::string getLang() const
+    {
+      return extractQueryValue("books.filter.lang");
+    }
+
     std::string url() const
     {
       return makeUrl(query, start, resultsPerPage);
@@ -522,7 +535,7 @@ TEST_F(TaskbarlessServerTest, searchResults)
     <opensearch:itemsPerPage>ITEMCOUNT</opensearch:itemsPerPage>
     <atom:link rel="search" type="application/opensearchdescription+xml" href="/ROOT/search/searchdescription.xml"/>
     <opensearch:Query role="request"
-      searchTerms="PATTERN"
+      searchTerms="PATTERN"LANGQUERY
       startIndex="FIRSTRESULT"
       count="ITEMCOUNT"
     />)";
@@ -533,6 +546,12 @@ TEST_F(TaskbarlessServerTest, searchResults)
       header = replace(header, "ITEMCOUNT",  to_string(realResultsPerPage));
       header = replace(header, "RESULTCOUNT", to_string(totalResultCount));
       header = replace(header, "PATTERN",     getPattern());
+      auto queryLang = getLang();
+      if (queryLang.empty()) {
+        header = replace(header, "LANGQUERY", "");
+      } else {
+        header = replace(header, "LANGQUERY", "\n      language=\""+queryLang+"\"");
+      }
       return header;
     }