Thanks, this will work fine, except we just need #4 below.
1 "core-dismiss-label" is for the link that appears underneath one or more AlertManager alert messages. It's "Dismiss all" because it dismisses (removes) all of the alert messages from the page.
2. Translation not needed
3. Translation not needed
4. This is part of the datefield (date picker) calendar. The "None" button dismisses the calendar and empties the associated date field. The label means, essentially, "No Date" or "Nothing". Perhaps "Nic"? It needs to be a small word if possible.