diff --git a/lib/ontologies_linked_data/serializer.rb b/lib/ontologies_linked_data/serializer.rb
index d952723f..c1d9f630 100644
--- a/lib/ontologies_linked_data/serializer.rb
+++ b/lib/ontologies_linked_data/serializer.rb
@@ -109,7 +109,7 @@ def self.print_stacktrace?
     end
 
     def self.get_language(params)
-      lang = params['lang'] || params['language'] || 'all'
+      lang = params['lang'] || params['language'] ||  Goo.main_languages&.first.to_s || 'en'
       lang = lang.split(',').map {|l| l.downcase.to_sym}
       return lang.length == 1 ? lang.first : lang
     end
diff --git a/lib/ontologies_linked_data/serializers/json.rb b/lib/ontologies_linked_data/serializers/json.rb
index e3e82376..a4b907bb 100644
--- a/lib/ontologies_linked_data/serializers/json.rb
+++ b/lib/ontologies_linked_data/serializers/json.rb
@@ -59,7 +59,7 @@ def self.get_languages(submission, user_languages)
           langauges = get_submission_languages(submission.naturalLanguage)
                   
           # intersection of the two arrays , if the requested language is not :all
-          result_lang = user_languages == :all ? langauges : user_languages & langauges
+          result_lang = user_languages == :all ? langauges : Array(user_languages) & langauges
           result_lang = result_lang.first if result_lang.length == 1
 
         end