Note that When your retailer has now been indexed by Google or every other internet search engine, it would get a while in your variations to look in the search results... You may have to be patient!   You specify the primary URL as the search engine might have issues https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html