Whilst Gary Illyes, a Google analyst, believes that search engines like google and yahoo could depend fewer on hreflang plus much more on automatic language detection Down the road, for now, the tag is our greatest wager.  There are actually three ways to include hreflang tags to webpages (by insert, https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html