Play Text to Speech buttons in NPC and Books

Could we get a play button for text-to-speech in the NPC dialog text field? the problem with text-to-speech is it's horrible if you just leave it on all the time. I think many customers would use it alot more if it was only used in places like books and dialog boxes with lots of text. Vs reading everything on the screen, or that I point at.

So could we get more localized "play buttons" for text-to-speech as an addition to the global system we have now