The tag will likely not disguise true duplicate content that you'll have on your web site, for example related solution descriptions for various things. Google will only study through your hreflang tag that written content “a” is actually a translation of content “b.” Your x-default mustn't position to your English https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/30904-automatyczne-tagi-hreflang-i-tagi-kanoniczne-seo.html