Validate existing hreflang implementations or generate correct hreflang tags
Works with
for multi-language and multi-region sites. Supports HTML, HTTP header, and
XML sitemap implementations.
AI-first code editor with Composer
Before installing skills in Cursor, ensure your development environment meets these requirements:
node --versionseo-hreflangExecute the skills CLI command in your project's root directory to begin installation:
Fetches seo-hreflang from agricidaniel/claude-seo and configures it for Cursor.
The CLI shows a list of agents. Use arrow keys and space to select Cursor:
Confirm successful installation by checking the skill directory location:
Restart Cursor to activate seo-hreflang. Access via /seo-hreflang in your agent's command palette.
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
Skills execute code in your environment. Always review source, verify the publisher, and test in isolation before production.
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Validate existing hreflang implementations or generate correct hreflang tags for multi-language and multi-region sites. Supports HTML, HTTP header, and XML sitemap implementations.
en, fr, de, ja)eng instead of en (ISO 639-2, not valid for hreflang)jp instead of ja (incorrect code for Japanese)zh without region qualifier (ambiguous; use zh-Hans or zh-Hant)en-US, en-GB, pt-BR)language-REGION (lowercase language, uppercase region)en-uk instead of en-GB (UK is not a valid ISO 3166-1 code)es-LA (Latin America is not a country; use specific countries)rel=canonical pointing elsewhere, hreflang on that page is ignored| Issue | Severity | Fix |
|---|---|---|
| Missing self-referencing tag | Critical | Add hreflang pointing to same page URL |
| Missing return tags (A→B but no B→A) | Critical | Add matching return tags on all alternates |
| Missing x-default | High | Add x-default pointing to fallback/selector page |
Invalid language code (e.g., eng) |
High | Use ISO 639-1 two-letter codes |
Invalid region code (e.g., en-uk) |
High | Use ISO 3166-1 Alpha-2 codes |
| Hreflang on non-canonical URL | High | Move hreflang to canonical URL only |
| HTTP/HTTPS mismatch in URLs | Medium | Standardize all URLs to HTTPS |
| Trailing slash inconsistency | Medium | Match canonical URL format exactly |
| Hreflang in both HTML and sitemap | Low | Choose one method (sitemap preferred for large sites) |
| Language without region when needed | Low | Add region qualifier for geo-targeted content |
Best for: Sites with <50 language/region variants per page.
<link rel="alternate" hreflang="en-US" href="https://example.com/page" />
<link rel="alternate" hreflang="en-GB" href="https://example.co.uk/page" />
<link rel="alternate" hreflang="fr" href="https://example.com/fr/page" />
<link rel="alternate" hreflang="x-default" href="https://example.com/page" />
Place in <head> section. Every page must include all alternates including itself.
Best for: Non-HTML files (PDFs, documents).
Link: <https://example.com/page>; rel="alternate"; hreflang="en-US",
<https://example.com/fr/page>; rel="alternate"; hreflang="fr",
<https://example.com/page>; rel="alternate"; hreflang="x-default"
Set via server configuration or CDN rules.
Best for: Sites with many language variants, cross-domain setups, or 50+ pages.
See Hreflang Sitemap Generation section below.
| Method | Best For | Pros | Cons |
|---|---|---|---|
| HTML link tags | Small sites (<50 variants) | Easy to implement, visible in source | Bloats <head>, hard to maintain at scale |
| HTTP headers | Non-HTML files | Works for PDFs, images | Complex server config, not visible in HTML |
| XML sitemap | Large sites, cross-domain | Scalable, centralized management | Not visible on page, requires sitemap maintenance |
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:xhtml="http://www.w3.org/1999/xhtml">
<url>
<loc>https://example.com/page</loc>
<xhtml:link rel="alternate" hreflang="en-US" href="https://example.com/page" />
<xhtml:link rel="alternate" hreflang="fr" href="https://example.com/fr/page" />
<xhtml:link rel="alternate" hreflang="de" href="https://example.de/page" />
<xhtml:link rel="alternate" hreflang="x-default" href="https://example.com/page" />
</url>
<url>
<loc>https://example.com/fr/page</loc>
<xhtml:link rel="alternate" hreflang="en-US" href="https://example.com/page" />
<xhtml:link rel="alternate" hreflang="fr" href="https://example.com/fr/page" />
<xhtml:link rel="alternate" hreflang="de" href="https://example.de/page" />
<xhtml:link rel="alternate" hreflang="x-default" href="https://example.com/page" />
</url>
</urlset>
Key rules:
xmlns:xhtml namespace declaration<url> entry must include ALL language alternates (including itself)<url> entry with its own full set| Language | URL | Self-Ref | Return Tags | x-default | Status |
|---|---|---|---|---|---|
| en-US | https://... | ✅ | ✅ | ✅ | ✅ |
| fr | https://... | ❌ | ⚠️ | ✅ | ❌ |
| de | https://... | ✅ | ❌ | ✅ | ❌ |
<link> tags (if HTML method chosen)hreflang-sitemap.xml (if sitemap method chosen)| Scenario | Action |
|---|---|
| URL unreachable (DNS failure, connection refused) | Report the error clearly. Do not guess site structure. Suggest the user verify the URL and try again. |
| No hreflang tags found | Report the absence. Check for other internationalization signals (subdirectories, subdomains, ccTLDs) and recommend the appropriate hreflang implementation method. |
| Invalid language/region codes detected | List each invalid code with the correct replacement. Provide a corrected hreflang tag set ready to implement. |
Prerequisites
Time Estimate
15-45 minutes depending on use case complexity
Steps
Common Pitfalls
✓ Do
✗ Don't
💡 Pro Tips
✓ Use when
Use when skill capabilities match your task, clear ROI on time saved, and you can validate outputs. Best for repetitive tasks, learning, and quality improvement.
✗ Avoid when
Avoid when task requires deep expertise you can't validate, involves sensitive decisions, or when learning process is more valuable than speed of completion.
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seo-hreflang reduced setup friction for our internal harness; good balance of opinion and flexibility.
seo-hreflang is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
seo-hreflang fits our agent workflows well — practical, well scoped, and easy to wire into existing repos.
I recommend seo-hreflang for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
We added seo-hreflang from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
We added seo-hreflang from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
Keeps context tight: seo-hreflang is the kind of skill you can hand to a new teammate without a long onboarding doc.
seo-hreflang fits our agent workflows well — practical, well scoped, and easy to wire into existing repos.
seo-hreflang fits our agent workflows well — practical, well scoped, and easy to wire into existing repos.
Registry listing for seo-hreflang matched our evaluation — installs cleanly and behaves as described in the markdown.
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