It’s not likely you’ll ever generate website page versions focusing on all languages and locations. Sometimes, you’ll want to give Google a sign of what do to when a specified site or language isn’t obtainable or doesn’t exist. An x-default tag would be the URL that Google displays.  Mila is https://zanybookmarks.com/story18856633/5-easy-facts-about-hreflang-to-non-canonical-described