Hello,
Sync translation and try then – https://xstore.helpscoutdocs.com/article/103-translation-files-update , also check strings in Wishlist > Settings > Add to wishlist options
Provide temporary wp-admin access, so we can take a closer look at translation on your site.
Go to Header builder > delete Newsletter element from the header content >
https://prnt.sc/WcADa1Nz2-ME
Regards