AI-native i18n: live string context, validated translations, glossary for your app catalogs
glot MCP Server
AI-native i18n: live string context, validated translations, glossary for your app catalogs. The MCP server exposed by this project is identified as io.github.MattJeff/glot (slug: io-github-mattjeff-glot) and focuses on providing internationalization support centered on string context, translation validation, and glossary-based cataloging.
🛠️ Key Features
Live string context
Validated translations
Glossary for app catalogs
🚀 Use Cases
Supplying contextual information for in-app string translation workflows
Ensuring translations are validated against defined expectations
Managing and reusing glossary terms in application catalogs
⚡ Developer Benefits
Organizes internationalization data around context, validation, and a glossary structure
Supports translation catalogs for application use
⚠️ Limitations
Available source data does not specify tool names, counts, or server protocol details beyond the i18n description.
Your coding agent localizes your app. Deterministic code guarantees that nothing broken or too long lands in your catalogs.
glot translate refuses a Polish plural without few/many, a {nom} placeholder the source does not have and a German label 276px wide for a 120px button, then writes the corrected retries
The real glot translate binary. The LLM is scripted to get three strings wrong on its first pass; every refusal and message is glot's. Reproduce it, or rerun it with a real model doing the retries: docs/launch/record/refusal.sh.
sh
npx glot-i18n init # detect your i18n stack, write glot.toml + rules for your coding agent
npx glot-i18n i18nize # hardcoded UI strings -> keys, components rewritten (next-intl, react-i18next)
npx glot-i18n translate # translate only the delta; invalid output is refused, retried, never written
Or all of it in one idempotent step: npx glot-i18n localize --yes --targets fr,de (init if needed → i18nize → translate → check).
Guarantees
Checked by code on every LLM output, on glot set, in the overlay and in CI (glot check). A refused string goes back to the model with the exact reason (2 retries, then the fallback model); if it still fails, nothing is written.
Placeholders
{name}, {{name}}, tags: same set as the source, none invented, none translated. ICU, i18next and MessageFormat 2 syntax parsed.
CLDR plurals
Every category the target locale needs (pl: one, few, many, other; ar: six of them).
Glossary
glossary.toml in your repo: required and forbidden translations, do-not-translate terms.
Pixel width
glot measure records each key's box and font from your running app; translations are shaped with that font and refused if wider. glot fit shortens what already overflows.
Lockfile
glot.lock hashes source and target: only the delta is translated, and a hand edit is never overwritten without --force.
MCP for your agent
glot mcp gives Claude Code, Cursor or Codex your keys, their usages (file:line, UI role), the glossary, and tools that add strings through the same validator.
Works with the i18n library you already use, adds no runtime, bring your own LLM key (Anthropic, OpenAI, any OpenAI-compatible endpoint). MIT.