Thanks for your translation.
I'm not sure what kind of collaboration do you mean.
I've already pointed you to:
WinSCP Translation How To
It explains how to use Translation Administration interface to submit your translation:
https://winscp.net/eng/transladmin.php

Hi all,
I have created a python script using google translation API. Using that, I have updated the translations (machine Translation). Attached the same here. There are a lot of Errors in the translation. We need to review them and share it with the WinSCP team.

Is there a way to collaborate here, or Should I create a repo in GitHub for the same?

See தமிழ்.

@Selva Kumar: What does that mean? Can you give us details?

Hi Team,

Please enable the Tamil font in WinSCP.

Thanks
Selva Kumar M.
8428935100 | smartmasks

Thanks for your offer. I've sent you an email (I didn't receive your email).

Dear Mr.Martin / Translation Admin Team,

We want to translate WinSCP in to Tamil Language – One of the most used language in South Asia and South East Asia. Please, could you guide us how to do?

I've sent a mail to Mr.Martin's mail id as well.

Thanks
Nachu
DevOps Engineer
Singapore