Hi,
I use polylang and function "Language is determined by different domain names". My website http://www.aaa.fr is in french and http://www.aaa.com is in english.
My problem is that the sitemap does not work on the two sites and URL of each language are not well considered. It would be great for SEO to be able to differentiate each domain name for each language.
Is it possible to add this feature? I can help you for testing if needed.