seo-international

name	seo-international
description	SEO internacional y local: hreflang, sitios multi-idioma/región, GEO (visibilidad en AI Overviews, ChatGPT, Perplexity, Claude). Cubre x-default, ccTLD, llms.txt, RSL 1.0. Usar cuando: "hreflang", "SEO internacional", "multi-idioma", "multi-región", "geo-targeting", "llms.txt", "AI search", "GEO", "aparecer en ChatGPT/Perplexity", "citas en IA", "país incorrecto en resultados", "x-default". "AI visibility", "generative engine optimization", "AI Mode", "cited by AI", "zero-click AI results", "AI search traffic", "local SEO", "Google Business Profile".
allowed-tools	["Read","Grep","Glob","Bash","WebFetch"]

International SEO & AI Search Optimization (GEO)

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Part 1: Hreflang & International SEO

When NOT to Use Hreflang

1. Single-language, single-country site
2. Machine-translated pages without real localization
3. Content behind login or geo-blocking (must return 200 to Googlebot)
4. No search presence in target markets
5. Pagination/filter pages (only canonical pages)

Validation Checks

1. Self-referencing: Every page MUST include hreflang pointing to itself. URL must exactly match canonical.
2. Return tags: If A points to B, B MUST point back to A. Full bidirectional mesh.
3. x-default: Required on every page with hreflang. Points to language selector or most universal version.
4. Language codes (ISO 639-1):

Correct	Wrong	Note
ja	jp	jp = country, ja = language
zh-Hans	zh-cn	Must use script subtag
ko	kr	kr = country
en-GB	en-uk	UK not valid ISO 3166-1

5. Region codes: ISO 3166-1 Alpha-2, uppercase (en-GB, not en-gb).
6. Canonical alignment: Hreflang only on canonical URLs. Non-canonical = ignored.
7. Protocol/URL consistency: All HTTPS, consistent www/trailing slash.

5 Most Common Errors

Error	Fix
Missing return tags	Add matching B>A tags
Missing self-reference	Add self-referencing tag
Wrong codes (jp, kr)	Use ISO 639-1
Hreflang on non-canonical	Move to canonical URL only
x-default missing/wrong	Add to every page in set

Implementation Methods

See references/hreflang-examples.md for code examples (HTML link tags, HTTP headers, XML sitemap) and generation process.

• HTML link tags: Best for <50 variants
• HTTP headers: Best for non-HTML (PDFs)
• XML sitemap: Best for large sites, cross-domain

Output: HREFLANG-AUDIT.md

Summary (pages, variants, issues, method), validation results per page, critical issues with fixes, generated code, GSC verification steps.

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Part 2: AI Search / GEO Optimization (March 2026)

See references/geo-optimization.md for stats, brand signal correlations, AI crawler config, llms.txt, RSL 1.0, and platform-specific optimization.

GEO Analysis Criteria

Dimension	Weight	Key Signals
Passage-level citability	25%	134-167 word answer blocks, direct answer first, specific facts, attribution
Structural readability	20%	Question headings, short paragraphs, tables, lists, FAQ
Multi-modal content	15%	Text + images/video/infographics/tools (156% higher citation rates)
Authority & brand signals	20%	Author byline, pub dates, source citations, Wikipedia/Reddit/YouTube presence
Technical accessibility	20%	SSR required (AI crawlers don't execute JS), robots.txt access, llms.txt

Critical: Brand mentions correlate 3x more strongly with AI visibility than backlinks.

Output: GEO-ANALYSIS.md

1. GEO Readiness Score: XX/100 (breakdown by dimension)
2. Platform Scores table
3. AI Crawler Access Status
4. llms.txt Status
5. Brand Mention Analysis
6. Passage-Level Citability (3 best, 3 worst with rewrites)
7. SSR Check
8. RSL 1.0 Status
9. Top 5 Highest-Impact Actions
10. Content Reformatting Suggestions (before/after)