About

Spanish Rules Library is an independent, multilingual knowledge base for Spanish: its grammar, conjugation, usage, pronunciation, and regional variation. It is built to be a clear, structured source of truth: accurate enough for teachers, approachable enough for learners, and machine-readable enough for software and AI.

It is not a course or an exercise app. There are no lessons to complete or streaks to keep. Instead, every topic is a self-contained rule you can read, link to, and trust, alongside 638 machine-verified conjugation tables covering every tense, mood, and voseo form.

Structured for AI: every rule is published as human-readable pages and as a JSON API and AI-readable Markdown (ai.md), with an llms.txt index. Language apps, assistants, and agents can consume the same source of truth that people read, with attribution built in.

The site is multilingual (English, French, German, and Spanish interfaces) and takes regional Spanish seriously, with first-class coverage of voseo and the varieties of Bolivia and Paraguay.

Questions or corrections? Email us at info@spanishruleslibrary.com