# Spanish Rules Library Spanish Rules Library is an independent, multilingual, AI-first knowledge base for Spanish grammar, conjugation, usage, pronunciation, and regional variation. Tagline: Spanish rules for humans. Structured for AI. Important resources: - /api/taxonomy (all stable rule IDs) - /api/rules - /api/rules/{rule_id}/json - /api/rules/{rule_id}/ai.md - /api/mistakes - /api/search-index (client-side filterable index){query}&lang=en - /api/verbs/index (638 verbs, every form machine-verified; filter: ?pattern={rule_id}) - /api/verbs/{infinitive} (full table: simple + compound tenses, voseo, imperatives, reflexives) Learner languages (additive per rule; en always present): - en - fr - de (interface; content falls back to en) - es (interface; content falls back to en) License: - Generic content (all rule IDs except regional.*) and verb tables: CC BY-SA 4.0. Required attribution: "Spanish Rules Library — spanishruleslibrary.com — CC BY-SA 4.0". - regional.* content: all rights reserved; contact for licensing. - Source code: MIT. - more later Launch-deep regions: - global - BO (Bolivia) - PY (Paraguay) Canonical content model: - stable rule IDs - structured JSON - AI-readable Markdown - review status - version history