How does Lemwatch check hreflang tags?
Lemwatch validates hreflang clusters, confirms return-tags exist on all variants, and flags invalid locale codes or missing x-default entries.
Quick answer#
We crawl every page in a hreflang cluster, verify each variant lists back to all siblings (return-tags), validate locale codes against ISO 639-1 / 3166-1, and flag missing x-default.
What we detect#
en-UK instead of en-GB)Where to find it in Lemwatch#
Site → SEO → Hreflang — see the cluster graph.
FAQ#
Do you support HTTP header hreflang?#
Yes — we parse both HTML <link> and Link: headers.
Related#
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