crawl · crawl.hreflang.noXDefault
hreflang is missing x-default
x-default tells Google what to serve when no language matches. Without it, unmatched regions land on the wrong locale.
Why it matters
x-default tells Google which page to serve when no language matches. Without it, users from unmatched regions may land on the wrong locale.
Example fix
<link rel="alternate" hreflang="x-default" href="https://example.com/" />
Authoritative reference
https://developers.google.com/search/docs/specialized/international/localized-versions#xdefault
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