Website Migration: Internationalization Without Traffic Loss
An international website migration is the structural expansion or conversion of a website for multiple countries/languages that requires careful planning to preserve existing rankings and traffic.
Key Takeaways
- ✓301 redirects for all moved URLs are mandatory
- ✓Create complete URL mapping table before migration
- ✓Implement hreflang tags only after complete migration
- ✓Traffic loss of 10-20% is normal short-term
- ✓Monitoring: Check GSC data daily for 8 weeks after migration
International migration is one of the riskiest SEO operations — but safe to execute with the right planning.
Before the migration
Complete URL mapping table: Every old URL to its new equivalent. Document baseline data: traffic, rankings, indexation status, backlinks. Test staging environment. Choose timing: Not during a Google Core Update. Inform stakeholders.
During the migration
Implement 301 redirects for all URLs. Activate hreflang tags. Update XML sitemaps (remove old URLs, add new ones). Update internal links. Check canonical tags. In GSC: Verify new property.
After the migration
Daily monitoring for 8 weeks: GSC crawl errors, indexation status, rankings, traffic. Check redirect chains. Fix 404 errors. Remove old sitemaps via GSC.
Typical migration scenarios
From one language to multiple languages (add subfolders), from subdomains to subfolders, from ccTLD to subfolder, and CMS migration with internationalization.
“A poorly executed site migration can destroy years of SEO work overnight. Plan for a minimum of three months pre-migration and six months post-migration monitoring.”
— Aleyda Solis, International SEO Consultant, Orainti