Check and fix hreflang tags, which identify language and regional versions of web pages for search engines. Review rendered HTML and HTTP responses to find missing reciprocal links, incorrect language codes, and fallback settings.
Use when auditing metadata, crawlability, structured data, or indexability related to Add hreflang tags for multilingual sites. Verify the rendered HTML and HTTP response rather than relying only on source files.
Review and fix hreflang settings so search engines can show the appropriate language or regional version of a page. The skill checks reciprocal references between language versions, language and region codes, and x-default, which identifies the default destination. It examines generated HTML and HTTP responses instead of judging source files alone, identifies affected routes or templates, and explains how to verify the changes.
Use it for sites available in several languages, or sites with separate regional pages in the same language. It helps you check settings after adding a language version and review changes to metadata generation. You can also ask it to explain how search engines use these settings to choose a language version.
hreflang settings.”x-default.”Use ISO 639-1 language codes and ISO 3166-1 Alpha-2 region codes. The skill follows a policy of having every page reference all language and regional versions reciprocally, and including x-default for fallback destinations or language selection pages.
This overview was written by AI (OpenAI Codex) from the public SKILL.md. Check the original below for the exact behavior.
AI rated this skill on four points using only the contents of its SKILL.md. Stars and popularity are not taken into account.
The total counts each point as A = 25, B = 15, C = 5. Rated by AI (OpenAI Codex) as of Oct 23, 2026. Treat it as a guide and read the original before installing.
Review the instructions the agent will receive before you install.
Without hreflang, users searching in French might see your English page—proper implementation ensures the right language version appears in search results for each region.
Check if this multilingual website properly implements hreflang tags for language and regional targeting.
Add appropriate hreflang tags to indicate language and regional variations of this page.
Explain how hreflang tags help search engines serve the correct language version to users in different regions.
Review metadata generation, rendered HTML, structured data, and response headers related to Add hreflang tags for multilingual sites. Flag exact routes or templates where search-facing output violates the rule, and describe how to verify the final page output.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
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