Only canonical URLs should be outlined inside your sitemap, Though Google states that doing this is often a weak canonicalization signal. You will find 3 ways to include hreflang tags to webpages (by increase, we don’t suggest implement, we’ve already included that):  John Mueller explained on Reddit that Google will https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html