Hreflang="en-us": the ISO code for that language used within the web page, followed by the ISO code to the country at which that webpage is aimed (the nation/area code isn't normally demanded) For those who’re syndicating or republishing content on other sites, this is another time to use canonical tags. https://bookmarkinglog.com/story18811295/top-guidelines-of-automatic-hreflang-tags-canonical-tags-all-pages-seo