My text-to-speech does not appear when I publish to a Word document. Any idea how I can solve this problem?

I have the same requirement - and found that first documenting the planned "text to speech" in the Notes has been a huge timesaver, especially on large Storyline files.  It allows me to "copy/paste" to the text to speech, and is very helpful when the course content + audio is approved. I have encountered 2 unexpected benefits. 

First, the notes print in the .pdf for the person who will use it to record the "human voice recording" to match the approved script for the slides. 

Second, the .pdf with the notes outlines the design process document  for the course, which we keep for the Learning Design team as a reference of what the eLearning course looks like (without having to access Articulate Storyline first and review screen by screen).