In some cases, you might unintentionally noindex some choice pages you’ve referenced inside your hreflang tags. When this occurs, search engines like google and yahoo won’t Stick to the tag within the web page and received’t follow the return link within the web page that references the choice variations.  In https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html