diff --git a/src/multiselect_contextmenu.js b/src/multiselect_contextmenu.js
index dfa4cc9..f4b75c9 100644
--- a/src/multiselect_contextmenu.js
+++ b/src/multiselect_contextmenu.js
@@ -768,7 +768,6 @@ const updateToMultiCopyToBackpack =
           if (!backpack) {
             return '';
           }
-          const backpackCount = backpack.getCount();
           let workableBlocksLength = 0;
           const blockSelection = blockSelectionWeakMap.get(ws);
           if (!blockSelection.size) {
@@ -781,8 +780,17 @@ const updateToMultiCopyToBackpack =
               workableBlocksLength++;
             }
           }
-          return `(${workableBlocksLength}) ` +
-             `${Blockly.Msg['COPY_TO_BACKPACK']} (${backpackCount})`;
+          if (workableBlocksLength > 1) {
+            if (Blockly.Msg['COPY_X_TO_BACKPACK']) {
+              return Blockly.Msg['COPY_X_TO_BACKPACK']
+                  .replace('%1', workableBlocksLength.toString());
+            } else {
+              return Blockly.Msg['COPY_TO_BACKPACK'] +
+                  ` (${workableBlocksLength})`;
+            }
+          } else {
+            return Blockly.Msg['COPY_TO_BACKPACK'];
+          }
         },
         preconditionFn: function(scope) {
           if (!scope.block) return 'hidden';