Background of the issue:
I have activated WPML on the main site and on one subsite separately. Both have different languages activated with two languages in common: Hindi and English. I have translated the active theme (Rehub) on the subsite to Hindi, which is common to the main site as well.
Symptoms:
I can't see the Hindi translation on the main site. The main site has the default theme activated. String packages for Rehub are not appearing on the main site on attempted string translation.
Questions:
Why can't I see the Hindi translation on the main site?
How can I make the Rehub theme's string packages appear on the main site?
Why Themes are not registering on the main site
Welcome to WPML support. I think this is a normal behavior as the language setup is different from the main site and the sub site.
Consider the fact that you could have set up completely different languages on the main site in comparison with the sub site and it would work.
That is why, you should also translate the strings on the main site, like you translated in the sub-site.
But you can go to the Sub Site and go to WPML > String Translation and scroll down, you will see a section where you can export a text domain to a file.
After that you can go to the main website and import those there.
