About the configuration of the web site, you only will need to pick out the choice "Tailor made URL" and produce the customized canonical URL you would like, you can established a unique URL for each language of your shop (multilingual shop) There are actually three ways to include hreflang https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html