The hreflang “x-default” attribute worth indicators to Google algorithms which the web site doesn’t target any certain language or locale and is particularly the default webpage when no other site is healthier suited. Appropriate implementation: Ensure hreflang tags are correctly carried out and that language codes align with ISO expectations. https://addons.prestashop.com/it/seo-indicizzazione-naturale/30904-tag-hreflang-automatici-e-tag-canonici-seo.html