Although Gary Illyes, a Google analyst, believes that search engines may perhaps count significantly less on hreflang plus much more on automatic language detection in the future, for now, the tag is our best guess.  If none of these are definitely utilised, Google will depend upon other indicators like hreflang, https://macrobookmarks.com/story18912471/rumored-buzz-on-tag-hreflang-automatici-e-tag-canonici-seo