---
name: i18n
description: Use when implementing or debugging code that uses @suaveplan/i18n: Internationalization core: message catalog, ICU-like interpolation, pluralization, locale resolution, middleware, date/currency formatting.
---

# @suaveplan/i18n

Enterprise-grade internationalization (i18n) core for Suaveplan. Works in Bun, Node.js, and modern browsers — zero DOM dependencies, tree-shakeable subpath exports. The package covers the full i18n surface: a namespaced `MessageCatalog` with lazy loaders and missing-key hooks; an `InterpolationEngine` with `{{ variable }}` and HTML-escape support; a `PluralizationEngine` with 14 language rules (including Arabic, Russian, and Celtic forms); an ICU-lite AST message parser for plural/select nodes; a `LocaleResolver` with BCP-47 normalisation, RTL detection, and fallback chains; server-side locale middleware; and `Intl`-backed date and currency formatters. Do not confuse with `@suaveplan/templates`, which handles string interpolation in non-i18n contexts — this package is specifically for locale-keyed message catalogs and locale-sensitive formatting.

## When to use this skill

- Implementing or debugging code that imports `@suaveplan/i18n`.
- The task touches: see package README.
- You need API guidance for this package's exports.

## Quick reference

```ts
import { /* see API Reference below */ } from "@suaveplan/i18n";
```

## Dependencies

Workspace dependencies: `@suaveplan/error`, `@suaveplan/types`

## Where to read more

This skill is intentionally short. The package's own documentation is the authoritative source — read these in order:

1. **`packages/i18n/i18n/README.md`** — overview, install, quick-start, module index
2. **`packages/i18n/i18n/src/**/*.md`** — co-located docs per implementation file (Purpose, Features, Basic + Advanced examples, full API reference, Implementation notes — all packages  ship ≥200 words per module)
3. **`packages/i18n/i18n/package.json`** `exports` map — every subpath you can import from

When the user asks an API question, read the relevant co-located `.md` first; do not answer from training-data memory.

## See also

- `@suaveplan/error`
- `@suaveplan/types`

---

_This SKILL.md is auto-generated by `suaveplan-skills/scripts/generate-skills.ts` from the package's README. Do not edit by hand — re-run the generator after the README changes._