Token to Words - How to keep track of which words belong to a token?

[geckl]

Hey everyone, so I'm stuck on a problem: I need to send user-inputted text through Flite, and then display the original text on screen with synced up word highlighting. The problem is that when a token gets expanded into multiple words (1983 -> Nineteen Eighty Three) I can't find a way to keep these words "grouped" together so that I can then sync all three words up to the original highlighted token "1983". I've tried modifying the us_tokentowords function so that it returns all the words in a single string, but I can't quite get it to work. Has anyone here come up with a solution to any similar problems? Any help would be much appreciated, thanks!