update en-US

lib/locales/en-US/translation.json

@@ -296,6 +296,8 @@
         "by_invalidating": "By invalidating, you can make page transition as the only object for forward/back command of the browser.",        
         "Custom CSS": "Custom CSS",
         "write_CSS": "You can write CSS that is applied to whole system.",
-        "reflect_change": "You need to reload the page to reflect the change."
+        "reflect_change": "You need to reload the page to reflect the change.",
+        "ctrl_space": "Ctrl+Space to Autocomplete"
+        
       }
 }