In case you have numerous language or country variations that you simply mark up with hreflang, then Just about every of such versions should have a canonical tag pointing to itself. Yahoo: Yahoo works by using Bing’s lookup technological know-how and supports hreflang tags in the same way as Bing. https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html