1.8 URL structure & internationalisationMediumInferred
hreflang missing x-default
What it is
No fallback for unmatched locales.
Why it matters
Users outside listed locales get no defined default.
How to fix it
Add an x-default annotation.
Impact
Low-medium. Inferred.
Evidence
Provide x-default for unmatched users. Google Search Central, Tell Google about localized versions (hreflang)