Implementing the hreflang tag onto your site correctly is usually a little bit tough. Down below is actually a tutorial regarding how to do it. Your x-default must not issue to your English web page. Rather it need to place into a site for buyers to settle on their language https://addons.prestashop.com/it/seo-indicizzazione-naturale/30904-tag-hreflang-automatici-e-tag-canonici-seo.html