ISO 639-1 Language & ISO 3166-1 Country Code Finder
Look up valid two-letter ISO 639-1 language codes and ISO 3166-1 Alpha-2 country codes for hreflang tag syntax.
What is the ISO Language Code Finder?
The ISO Language Code Finder by CompleteSEOTools is an enterprise multi-region search optimization utility engineered to configure, validate, and troubleshoot hreflang tags, international domain structures, and multilingual content localization.
How to Use the ISO Language Code Finder (Step-by-Step)
Input Regional URLs
Enter canonical page URLs, language codes, or foreign language titles.
Generate Tags & Strategy
Compile bidirectional hreflang tags, XML sitemaps, or domain recommendations.
Deploy to Head / Sitemap
Paste generated tags into your page <head> or submit the multi-region sitemap.
Google International SEO Guidelines
Targeting global audiences requires valid ISO language and country codes, reciprocal return links on all localized variants, and an unambiguous fallback destination (`hreflang="x-default"`). Consolidating international content into subdirectories (`/uk/`, `/de/`) preserves root domain authority while streamlining indexing.
Frequently Asked Questions (FAQs)
No! Hreflang requires the language code first (e.g. 'es-mx' for Spanish in Mexico). Country codes alone are invalid.