Data & API

Francorium’s structured data is available in formats built for reuse, research and language applications: a flat-file JSON API, open dumps, and llms.txt. Applications, researchers, corpora, linguistic tools and AI systems are all welcome consumers.

API endpoints

• /api/taxonomy — Canonical category + rule-id tree.
• /api/rules/list/{lang} — Summaries of every rule for a language.
• /api/rules/{id}/json — Full structured rule JSON.
• /api/rules/{id}/ai.md — Rule rendered as Markdown with attribution footer.
• /api/verbs/index — Index of verbs (infinitive, id, auxiliary, translation).
• /api/verbs/{infinitive} — Full conjugation tables for a verb.
• /api/mistakes/list — Common learner mistakes linked to rules.
• /api/search-index — Compact index across rules, verbs and mistakes.
• /api/search/{lang} — The same index with titles in a given language.
• /llms.txt — Machine-readable project overview + endpoint links.

Licensing & attribution

Content licensed CC BY-SA 4.0. Regional (regional.*) content: all rights reserved.

Every ai.md rendering carries an attribution + license footer. Code is MIT; generic content is CC BY-SA 4.0; the regional.* namespace is all rights reserved.