The fork has been reviewed and merged on GitHub. See https://github.com/indictechcom/translatable-wikitext-converter

Could you provide the exact input that generated the wrong output? @Ata

Hi! @Ata and the others :) Sorry for the delay.
I just gave a quick look and I couldn't reproduce the error.
If I go to https://translatetagger.toolforge.org/convert
and insert the Input Wikitext:

This is a testing example.
*What: Enter the title of the event
*Register your interest, using your signature (4 tildes):

The Translatable Wikitext Output is:

<translate>This is a testing example.</translate>
* <translate>What: Enter the title of the event</translate>
* <translate>Register your interest, using your signature (4 tildes):</translate>

In this case, the parsing is correct.

I tried to address this in a fork: https://github.com/super-nabla/translatable-wikitext-converter.
I also posted this in T393170

Well done! Nice tool. @Gopavasanth, I forked your project and tried to add support for "tvar"s:
https://github.com/super-nabla/translatable-wikitext-converter.
I'm quite a newbie here, so please let me know what you think and if there's anything I should fix.

Thank you, Izno!