Understand that rel=””alternate”” hreflang=””x”” will instruct engines like google to show the translated (localized) version of a web site. Meanwhile, rel=canonical attribute will mark that this isn't the authoritative or canonical Model. Indeed, whenever you refresh the website page, solution aspects are sent on facts tables if solution information in https://addons.prestashop.com/it/seo-indicizzazione-naturale/30904-tag-hreflang-automatici-e-tag-canonici-seo.html