- Module will work with no producing any modify in the prevailing PrestaShop file in order that current customization and topic change never have an impact on. The hreflang tag (also called rel=” alternate” hreflang=”x”) tells search engines like google which region a certain webpage is meant for, which language https://addons.prestashop.com/en/seo-natural-search-engine-optimization/30904-automatic-hreflang-tags-canonical-tags-all-pages-seo.html