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Technical SEO FAQ · International SEO, Structured Data & Advanced Technical Signals

What are common hreflang implementation failures?

Common issues include:

  • invalid language/region codes;
  • missing return references;
  • URLs that redirect;
  • URLs that don't exist;
  • incorrect canonical relationships;
  • mismatched localized pages;
  • accidental cross-language references.

Audit hreflang as a graph, not just a tag.

For every URL:

A → B
B → A

and verify the whole regional set.

Sources

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