1.8 URL structure & internationalisationHighVerified
hreflang not reciprocal
hreflang has to be a two-way handshake: if A points to B, B must point back to A. Missing return tags break the whole cluster, and Google may ignore it.
What it is
Return tags missing between versions.
Why it matters
Non-reciprocal hreflang is ignored, defeating the implementation.
How to fix it
Ensure every version references all others, including itself.
How to find it on your site
- Map the hreflang annotations between every version.
- Check that each pair references the other reciprocally.
- Add the missing return tags.
- Re-validate the full cluster.
Cross-reference to ranking and citation factors
Non-reciprocal hreflang is often disregarded entirely, so the localisation signal is lost. Reciprocity is what makes it work.
Impact
Medium-high. Direct.
Evidence
hreflang must be reciprocal. Google Search Central, Tell Google about localized versions (hreflang)
Sources