Hi,
I’m having the same issue and can’t figure out why it is not working.
Objective: translate the comment section fields in Dutch.
I downloaded both generatepress free and GP Premium theme translations with a filter on “comment” on WordPress.org and uploaded them to the wp-content/languages/themes folder. No success.
I verified that the concerned words and text are present in the .po files. They are.
I tried changing the name from wp-themes-generatepress-nl.po to wp-themes-generatepress-nl_BE.po (my site language is nl_BE)
I tried the same using the .mo versions
I purged cache
To verify, I hard changed the “Leave a comment” string using a filter. That works, but it is not a solution for the other fields.
Do you have an idea what could be the cause?