“Wish list is empty!” message translation.

Hi,

I have been trying to change the phrase “Wish list is empty!” within the wishlist page, but unfortunately, I have not been able to do it.
A similar change was made withinh the “Than You” page.

Could you please help me to know the process to translate the phrase? Or, Is there a possibility for you to include a language file “.po” so I can edit it?

Thanks in advance.

The page I need help with: [log in to see the link]