fixed dropdown menu generation for untranslated items

HISTORY.md

@@ -13,6 +13,7 @@
 * blocks: don't translate variable names in drop-down menus
 * objects: don't translate variable names in "delete a variable" button menu
 * blocks: don't translate variable names in "inherit" block menu
+* blocks: fixed dropdown menu generation for untranslated items
 
 ## v5.3.1:
 * **Notable Fixes:**

src/blocks.js

@@ -8749,7 +8749,7 @@ InputSlotMorph.prototype.menuFromDict = function (
             } else if (choices[key].length === 2) { // don't translate
                 menu.addItem(
                     key,
-                    choices[key],
+                    choices[key][0],
                     null, // hint
                     null, // color
                     null, // bold