Here is a version that should work...

https://www.dropbox.com/s/1ahmqhqbjde3gdm/clipspeak2021.1_compatible_and_translations_possible.nvda-addon?dl=1

You can also use other add-ons to the same purpose...

Rui Fontes

There does not seem to be.  Even on GitHub, the original ClipSpeak code has remained unchanged since 2017.  I can't seem to find any easy way to contact the original developer, either.

Since this project is open-source someone else could take it over if the original developer cannot be reached or has made the decision to cease development.
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Brian - Windows 10, 64-Bit, Version 21H1, Build 19043  

Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.

         ~Martin Luther King, Jr.