- Module performs without the need of building any change in the existing PrestaShop file to ensure that existing customization and topic alter don't impact. The hreflang tag (also referred to as rel=” alternate” hreflang=”x”) tells search engines like google and yahoo which nation a certain web page is meant https://addons.prestashop.com/fr/seo-referencement-naturel/30904-balises-hreflang-automatiques-et-balises-canoniques-seo.html