Whilst Gary Illyes, a Google analyst, believes that engines like google may possibly count fewer on hreflang and a lot more on automatic language detection in the future, for now, the tag is our greatest wager.  Canonical tags are certainly not the sole technique to declare a website page’s canonical. https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-google-rich-snippets-json-ld-opengraph-twitter-tags-schemaorg.html