Version of the webpage must be indexed. Hreflang tags notify the search engine that numerous variations of the exact same site exist but all of them Canonical issues often may result in copy articles challenges. They confuse search engines like yahoo and allow it to be complicated for research bots https://addons.prestashop.com/es/seo-posicionamiento-buscadores/30904-etiquetas-automaticas-hreflang-canonical-etiquetas-seo.html