Spell Check prompt upon saving, exporting or printing a document.
When you have finished creating your piece of design or artwork, could InDesign prompt/ask you if you would like to spell check your document? The prompt would come up when you attempt to save, export or print your work, asking if you would like to do this before you complete the relevant action.
This will be extremely useful as this is a key process that gets forgotten by many artworks. This could be a setting option that could ticked on within preferences.