diff --git a/Gemfile.lock b/Gemfile.lock
index e4bda0b3..44537959 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
       rack (>= 0.4)
     rack-attack (6.6.1)
       rack (>= 1.0, < 3)
-    rack-cache (1.13.0)
+    rack-cache (1.14.0)
       rack (>= 0.4)
     rack-cors (1.0.6)
       rack (>= 1.6.0)
diff --git a/helpers/search_helper.rb b/helpers/search_helper.rb
index 5d37d884..071000d9 100644
--- a/helpers/search_helper.rb
+++ b/helpers/search_helper.rb
@@ -82,6 +82,9 @@ def get_term_search_query(text, params={})
           end
         end
 
+        lang = params["lang"] || params["language"]
+        lang_suffix  = lang && !lang.eql?("all") ? "_#{lang}" : ""
+
         query = ""
         params["defType"] = "edismax"
         params["stopwords"] = "true"
@@ -98,15 +101,15 @@ def get_term_search_query(text, params={})
 
         if params[EXACT_MATCH_PARAM] == "true"
           query = "\"#{solr_escape(text)}\""
-          params["qf"] = "resource_id^20 prefLabelExact^10 synonymExact #{QUERYLESS_FIELDS_STR}"
-          params["hl.fl"] = "resource_id prefLabelExact synonymExact #{QUERYLESS_FIELDS_STR}"
+          params["qf"] = "resource_id^20 prefLabelExact#{lang_suffix }^10 synonymExact#{lang_suffix } #{QUERYLESS_FIELDS_STR}"
+          params["hl.fl"] = "resource_id prefLabelExact#{lang_suffix } synonymExact#{lang_suffix } #{QUERYLESS_FIELDS_STR}"
         elsif params[SUGGEST_PARAM] == "true" || text[-1] == '*'
           text.gsub!(/\*+$/, '')
           query = "\"#{solr_escape(text)}\""
           params["qt"] = "/suggest_ncbo"
-          params["qf"] = "prefLabelExact^100 prefLabelSuggestEdge^50 synonymSuggestEdge^10 prefLabelSuggestNgram synonymSuggestNgram resource_id #{QUERYLESS_FIELDS_STR}"
+          params["qf"] = "prefLabelExact#{lang_suffix }^100 prefLabelSuggestEdge^50 synonymSuggestEdge^10 prefLabelSuggestNgram synonymSuggestNgram resource_id #{QUERYLESS_FIELDS_STR}"
           params["pf"] = "prefLabelSuggest^50"
-          params["hl.fl"] = "prefLabelExact prefLabelSuggestEdge synonymSuggestEdge prefLabelSuggestNgram synonymSuggestNgram resource_id #{QUERYLESS_FIELDS_STR}"
+          params["hl.fl"] = "prefLabelExact#{lang_suffix } prefLabelSuggestEdge synonymSuggestEdge prefLabelSuggestNgram synonymSuggestNgram resource_id #{QUERYLESS_FIELDS_STR}"
         else
           if text.strip.empty?
             query = '*'
@@ -114,9 +117,9 @@ def get_term_search_query(text, params={})
             query = solr_escape(text)
           end
 
-          params["qf"] = "resource_id^100 prefLabelExact^90 prefLabel^70 synonymExact^50 synonym^10 #{QUERYLESS_FIELDS_STR}"
+          params["qf"] = "resource_id^100 prefLabelExact#{lang_suffix }^90 prefLabel#{lang_suffix }^70 synonymExact#{lang_suffix }^50 synonym#{lang_suffix }^10 #{QUERYLESS_FIELDS_STR}"
           params["qf"] << " property" if params[INCLUDE_PROPERTIES_PARAM] == "true"
-          params["hl.fl"] = "resource_id prefLabelExact prefLabel synonymExact synonym #{QUERYLESS_FIELDS_STR}"
+          params["hl.fl"] = "resource_id prefLabelExact#{lang_suffix } prefLabel#{lang_suffix } synonymExact#{lang_suffix } synonym#{lang_suffix } #{QUERYLESS_FIELDS_STR}"
           params["hl.fl"] = "#{params["hl.fl"]} property" if params[INCLUDE_PROPERTIES_PARAM] == "true"
         end
 
diff --git a/test/controllers/test_search_controller.rb b/test/controllers/test_search_controller.rb
index 21a3dd18..74be75d2 100644
--- a/test/controllers/test_search_controller.rb
+++ b/test/controllers/test_search_controller.rb
@@ -213,4 +213,48 @@ def test_search_provisional_class
     assert_equal @@test_pc_child.label, provisional[0]["prefLabel"].first
   end
 
+  def test_multilingual_search
+    get "/search?q=Activity&ontologies=BROSEARCHTEST-0"
+    res =  MultiJson.load(last_response.body)
+    refute_equal 0, res["totalCount"]
+
+    doc = res["collection"].select{|doc| doc["@id"].to_s.eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+    refute_nil doc
+
+    #res = LinkedData::Models::Class.search("prefLabel_none:Activity", {:fq => "submissionAcronym:BROSEARCHTEST-0", :start => 0, :rows => 80}, :main)
+    #refute_equal 0, res["response"]["numFound"]
+    #refute_nil res["response"]["docs"].select{|doc| doc["resource_id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+    get "/search?q=Activit%C3%A9&ontologies=BROSEARCHTEST-0&lang=fr"
+    res =  MultiJson.load(last_response.body)
+    refute_equal 0, res["totalCount"]
+    refute_nil res["collection"].select{|doc| doc["@id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+
+
+    get "/search?q=ActivityEnglish&ontologies=BROSEARCHTEST-0&lang=en"
+    res =  MultiJson.load(last_response.body)
+    refute_equal 0, res["totalCount"]
+    refute_nil res["collection"].select{|doc| doc["@id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+
+    get "/search?q=ActivityEnglish&ontologies=BROSEARCHTEST-0&lang=fr&require_exact_match=true"
+    res =  MultiJson.load(last_response.body)
+    assert_nil res["collection"].select{|doc| doc["@id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+    get "/search?q=ActivityEnglish&ontologies=BROSEARCHTEST-0&lang=en&require_exact_match=true"
+    res =  MultiJson.load(last_response.body)
+    refute_nil res["collection"].select{|doc| doc["@id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+    get "/search?q=Activity&ontologies=BROSEARCHTEST-0&lang=en&require_exact_match=true"
+    res =  MultiJson.load(last_response.body)
+    assert_nil res["collection"].select{|doc| doc["@id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+    get "/search?q=Activit%C3%A9&ontologies=BROSEARCHTEST-0&lang=fr&require_exact_match=true"
+    res =  MultiJson.load(last_response.body)
+    refute_nil res["collection"].select{|doc| doc["@id"].eql?('http://bioontology.org/ontologies/Activity.owl#Activity')}.first
+
+
+  end
+
 end
diff --git a/test/data/ontology_files/BRO_v3.2.owl b/test/data/ontology_files/BRO_v3.2.owl
index d64075cc..b2aeccf5 100644
--- a/test/data/ontology_files/BRO_v3.2.owl
+++ b/test/data/ontology_files/BRO_v3.2.owl
@@ -631,6 +631,9 @@
 
     <owl:Class rdf:about="&activity;Activity">
         <core:prefLabel rdf:datatype="&xsd;string">Activity</core:prefLabel>
+         <core:prefLabel rdf:datatype="&xsd;string">Activity</core:prefLabel>
+         <core:prefLabel xml:lang="en">ActivityEnglish</core:prefLabel>
+         <core:prefLabel xml:lang="fr">Activité</core:prefLabel>
         <desc:definition rdf:datatype="&xsd;string">Activity of interest that may be related to a BRO:Resource.</desc:definition>
         <core:altLabel>activities</core:altLabel>
     </owl:Class>
diff --git a/test/solr/docker-compose.yml b/test/solr/docker-compose.yml
new file mode 100644
index 00000000..3ddae69c
--- /dev/null
+++ b/test/solr/docker-compose.yml
@@ -0,0 +1,13 @@
+version: '3.8'
+
+services:
+  op_solr:
+    image: solr:8.8
+    volumes:
+      - ./solr_configsets:/configsets:ro
+    ports:
+      - "8983:8983"
+    command: >
+      bash -c "precreate-core term_search_core1 /configsets/term_search
+      && precreate-core prop_search_core1 /configsets/property_search
+      && solr-foreground"
diff --git a/test/solr/generate_ncbo_configsets.sh b/test/solr/generate_ncbo_configsets.sh
index 893f7f3a..7b4281f7 100755
--- a/test/solr/generate_ncbo_configsets.sh
+++ b/test/solr/generate_ncbo_configsets.sh
@@ -2,18 +2,23 @@
 # generates solr configsets by merging _default configset with config files in config/solr
 # _default is copied from sorl distribuion solr-8.10.1/server/solr/configsets/_default/
 
-pushd solr/configsets
-ld_config='../../../../ontologies_linked_data/config/solr/'
-#ld_config='../../../../config/solr/'
-ls -l $ld_config
-pwd
-[ -d property_search ] && rm -Rf property_search
-[ -d term_search ] && rm -Rf property_search
-[ -d $ld_config/property_search ] || echo "cant find ontologies_linked_data project" 
-mkdir -p property_search/conf
-mkdir -p term_search/conf
-cp -a _default/conf/* property_search/conf/
-cp -a _default/conf/* term_search/conf/
-cp -a $ld_config/property_search/* property_search/conf
-cp -a $ld_config/term_search/* term_search/conf
-popd
+#cd solr/configsets
+ld_config='config/solr'
+configsets='test/solr/configsets'
+[ -d ${configsets}/property_search ] && rm -Rf ${configsets}/property_search
+[ -d ${configsets}/term_search ] && rm -Rf ${configsets}/term_search
+if [[ ! -d ${ld_config}/property_search ]]; then
+  echo 'cant find ld solr config sets'
+  exit 1
+fi
+if [[ ! -d ${configsets}/_default/conf ]]; then
+  echo 'cant find default solr configset' 
+  exit 1
+fi
+mkdir -p ${configsets}/property_search/conf
+mkdir -p ${configsets}/term_search/conf
+cp -a ${configsets}/_default/conf/* ${configsets}/property_search/conf/
+cp -a ${configsets}/_default/conf/* ${configsets}/term_search/conf/
+cp -a $ld_config/property_search/* ${configsets}/property_search/conf
+cp -a $ld_config/term_search/* ${configsets}/term_search/conf
+