Do not forget that rel=””alternate”” hreflang=””x”” will instruct search engines like google and yahoo to indicate the translated (localized) Model of the web site. Meanwhile, rel=canonical attribute will mark that this is not the authoritative or canonical Model. Existen también multitud de módulos SEO de PrestaShop que te pueden ayudar https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/30904-automatische-hreflang-tags-en-canonieke-tags-seo.html