The tag is not going to hide precise replicate written content that you might have on your website, like related product descriptions for various objects. Google will only read by way of your hreflang tag that articles “a” can be a translation of information “b.” commences the set up. Beware https://addons.prestashop.com/en/seo-natural-search-engine-optimization/30904-automatic-hreflang-tags-canonical-tags-all-pages-seo.html