The hreflang “x-default” attribute value signals to Google algorithms the web site doesn’t target any precise language or locale and it is the default site when no other page is better suited. Exam your Nginx configuration for syntax glitches using the command ‘nginx -t‘. If almost everything is okay, you’ll https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/30904-automatyczne-tagi-hreflang-i-tagi-kanoniczne-seo.html