Whilst Gary Illyes, a Google analyst, thinks that search engines like google and yahoo may well count much less on hreflang plus more on automatic language detection in the future, for now, the tag is our best guess.  Canonical tags will not be the only method to declare a site’s https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html