Language versions should describe the same address role and status even when wording and regional context differ.
Map every language variant
List each canonical page, language code and reciprocal hreflang reference.
Broken or one-way references can cause search engines to select the wrong version.
Compare status meaning, not just words
Verify that active, pending, maintenance and retired labels carry the same operational meaning.
A translation that changes the certainty level creates misleading evidence.
Check dates and destination roles
Publication dates, review dates and primary-versus-mirror labels should remain aligned across variants.
Unexplained differences need a documented editorial reason.
Use x-default deliberately
The default version should serve users who do not match a specific language or region.
It should not point to an unrelated or less maintained page.
Publish corrections across all variants
When a material Mars Market claim changes, update every affected version and its structured data.
Partial corrections leave stale claims available to both users and crawlers.