Hi Maybellyne, hope you’re doing well!
All URLs that we have in out site are listed in the Yoast sitemap. The problem is that all translations are listed as single posts, there’s no explanation about principal language and translations, nothing tells Google that we don’t have copies, but translations of the main site. So, Google refuse our site in Adsense program because we have a lot os duplicate content.
I know that WPML create hreflang but it seems it’s not enough for Google. I think the sitemap iinformation is mor relevant. As Yoast say is this “hreflang ultimate guide”, we should have a sitemap that shows some kind of hierarchie between languages. That’s why I hope you’ll improve it as soon as possible.
I know I can creat a multilingual sitemap, but I’ll loose the automatic update from yoast site map.
Nothing is perfect!
