Notice that if your shop has by now been indexed by Google or some other internet search engine, it'd take some time for the alterations to seem while in the search results... You could have to Wait and see! The title of The shop itself is about throughout the set https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html