It’s unlikely you’ll ever produce webpage variations targeting all languages and locations. In some cases, you’ll will need to present Google a sign of what do to each time a provided locale or language isn’t available or doesn’t exist. An x-default tag would be the URL that Google shows.  It https://socialinplace.com/story4182410/details-fiction-and-%D0%90%D0%B2%D1%82%D0%BE%D0%BC%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5-%D1%82%D0%B5%D0%B3%D0%B8-hreflang-%D0%B8-%D0%BA%D0%B0%D0%BD%D0%BE%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5-%D1%82%D0%B5%D0%B3%D0%B8-seo