On the configuration of the page, you only will need to pick the option "Custom URL" and produce the custom made canonical URL you need, you are able to set another URL for each language of the store (multilingual shop) Rel=canonical must only seem within the of a doc. A https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html