Update public/index.html

public/index.html

@@ -461,13 +461,13 @@
 
   <!-- language selection script -->
   <script>
-    var lang_new = "1";
+    var lang_setting = "1";
  </script>
   
   <script>
     $('.selectpicker').change(function(){
         lang_setting = $(this).val();
-        language(lang_new);
+        language(lang_setting);
     });
   </script>