How to identify word ends (boundary event ) while using non-native voice TTS

Hello Team,

I am working on a web app which would require a non-native voice TTS with
word by word highlighting in sync with the voice.
I hit the first hurdle when the boundary event failed to work with
non-native voices. Is there any way to identify word ends or to get the
boundary event to work while using non-native voices?
Please guide me.
Thank you in advance.

*KC*

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