The tag will not disguise true duplicate articles that you could have on your website, which include comparable product or service descriptions for different items. Google will only read by means of your hreflang tag that information “a” is actually a translation of articles “b.” Simply put, by using hreflang, https://addons.prestashop.com/it/seo-indicizzazione-naturale/30904-tag-hreflang-automatici-e-tag-canonici-seo.html