diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-account.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-account.tt
index f1ed9cc89f..684b4f4b14 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-account.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-account.tt
@@ -79,7 +79,6 @@
 <script>
 $( document ).ready(function() {
 
-    var MSG_MIN_THRESHOLD = _("Minimum amount needed by this service is %s");
     var txtActivefilter = _("Filter paid transactions");
     var txtInactivefilter = _("Show all transactions");
 
@@ -169,7 +168,7 @@ $( document ).ready(function() {
                             help.addClass('hide');
                         } else {
                             $(self).prop('disabled', true);
-                            help.html(MSG_MIN_THRESHOLD.format(parseInt(threshold,10).toFixed(2))).removeClass('hide');
+                            help.html( _("Minimum amount needed by this service is %s").format(parseInt(threshold,10).toFixed(2)) ).removeClass('hide');
                         }
                         resolve();
                     })
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-reserve.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-reserve.tt
index 0b4b5e91f2..34d1f4ff5b 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-reserve.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-reserve.tt
@@ -501,10 +501,6 @@
 [% INCLUDE 'calendar.inc' %]
 [% INCLUDE 'datatables.inc' %]
 <script>
-    var MSG_NO_ITEM_SELECTED = _("Expecting a specific item selection.");
-    var MSG_EMPTY_START_DATE = _("Hold start date should be filled.");
-    var MSG_EMPTY_END_DATE   = _("Hold expiration date should be filled.");
-
     $(document).ready(function() {
 
         $(".toggle_unholdable").click(function(e){
@@ -670,13 +666,13 @@
                 }
 
                 if( $(".holddatefrom").prop('required') && $("#from"+ biblioNum).val() == '' ) {
-                    alert(MSG_EMPTY_START_DATE);
+                    alert( _("Hold start date should be filled.") );
                     badBib = biblioNum;
                     if( $("#from"+biblioNum).parent(":hidden").length ) $("#toggle-hold-options-"+biblioNum).trigger('click');
                     $("#from"+biblioNum).siblings('.flatpickr_wrapper').find('.flatpickr-input').trigger('focus');
                     return false;
                 } else if( $(".futuredate").prop('required') && $("#to"+ biblioNum).val() == '' ) {
-                    alert(MSG_EMPTY_END_DATE);
+                    alert( _("Hold expiration date should be filled.") );
                     badBib = biblioNum;
                     if( $("#to"+biblioNum).parent(":hidden").length ) $("#toggle-hold-options-"+biblioNum).trigger('click');
                     $("#to"+biblioNum).siblings('.flatpickr_wrapper').find('.flatpickr-input').trigger('focus');
@@ -688,7 +684,7 @@
                     // Find the selected copy
                     var item = $(".checkitem_" + biblioNum + ":checked");
                     if ($(item).size() == 0) {
-                        alert(MSG_NO_ITEM_SELECTED);
+                        alert( _("Expecting a specific item selection.") );
                         badBib = biblioNum;
                         return false;
                     } else {
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-search-history.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-search-history.tt
index 44d44d4d39..9d5ce26b53 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-search-history.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-search-history.tt
@@ -291,8 +291,6 @@
 [% INCLUDE 'datatables.inc' %]
 [% INCLUDE 'columns_settings.inc' %]
 <script>
-
-    var MSG_CONFIRM_DELETE_HISTORY = _("Are you sure you want to delete selected search history entries?");
     $(document).ready(function() {
         // We show table ordered by descending dates by default
         // (so that the more recent query is shown first)
@@ -343,7 +341,7 @@
             if ( $(ids).length < 1 ) {
                 return false;
             }
-            if ( confirm(MSG_CONFIRM_DELETE_HISTORY) ) {
+            if ( confirm( _("Are you sure you want to delete selected search history entries?") ) ) {
                 $(form).submit();
             }
             return false;
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-shelves.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-shelves.tt
index aab73c6d4c..0adf950810 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-shelves.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-shelves.tt
@@ -837,10 +837,6 @@
     [% Asset.js("js/openlibrary.js") | $raw %]
 [% END %]
 <script>
-var MSG_REMOVE_FROM_LIST = _("Are you sure you want to remove these items from the list?");
-var MSG_REMOVE_ONE_FROM_LIST = _("Are you sure you want to remove this item from the list?");
-var MSG_CONFIRM_DELETE_LIST = _("Are you sure you want to delete this list?");
-var MSG_CONFIRM_REMOVE_SHARE = _("Are you sure you want to remove this share?");
 
 [% IF ( ( Koha.Preference( 'opacuserlogin' ) == 1 ) && ( Koha.Preference( 'OPACHoldRequests' ) == 1 ) ) %]
     function holdSelections() {
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-tags.tt b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-tags.tt
index 6c8bf4b18d..01d6fd5726 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-tags.tt
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-tags.tt
@@ -202,10 +202,9 @@
     }
 
     $(document).ready(function(){
-        var MSG_DELETE_TAG = _("Are you sure you want to delete the selected tag(s)?");
         $(".delete").on("click", function(e){
             if ( checkboxesChecked() == 1 ) {
-                return confirmDelete(MSG_DELETE_TAG);
+                return confirmDelete( _("Are you sure you want to delete the selected tag(s)?") );
             } else {
                 alert(_("Please select a tag to delete."));
                 e.preventDefault();