Even though Gary Illyes, a Google analyst, thinks that search engines like google may well count fewer on hreflang and a lot more on automatic language detection in the future, for now, the tag is our best guess.  You can use Ahrefs to resolve this problem – just go to https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html