Observe that When your keep has presently been indexed by Google or any other online search engine, it might consider a while to your modifications to look while in the search engine results... you might have to be patient! The title of the store alone is about over the installation https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html