---
id: patricio0312rev/skills/i18n-frontend-implementer
version: "9cd321e2"
license: MIT
install: manual
updated: 2026-01-12
---

# i18n-frontend-implementer — This skill guides you through building a complete internationalization layer for frontend applications. It covers library selection, dictionary organization, provider configuration, and implementing locale-aware formatting for dates, numbers, and currency. You'll also learn to add language switching UI and support for plural rules across your app.

Publisher: patricio0312rev · Stars: 52 · Updated: 2026-01-12

Install (manual): `git clone https://github.com/patricio0312rev/skills`

## SKILL.md

# i18n Frontend Implementer

Implement internationalization with next-intl, react-i18next, or similar libraries.

## Core Setup

**1. Install**: `npm install next-intl` or `react-i18next`
**2. Create dictionaries**: `locales/en.json`, `locales/es.json`
**3. Provider setup**: Wrap app with IntlProvider
**4. Translation keys**: Hierarchical namespace structure
**5. Formatters**: Date, number, currency formatting
**6. Language switcher**: Dropdown or flags UI

## Translation Structure

```json
{
  "common": { "nav": { "home": "Home", "about": "About" } },
  "auth": { "login": "Sign In", "logout": "Sign Out" },
  "errors": { "required": "{field} is required" }
}
```

## Usage Examples

```tsx
const t = useTranslations('common');
<h1>{t('nav.home')}</h1>

// With plurals
t('items', { count: 5 }) // "5 items"

// With formatting
<p>{formatDate(date, { dateStyle: 'long' })}</p>
```

## Best Practices

Use namespaces for organization, extract all text to translations, handle plurals properly, format dates/numbers per locale, provide language switcher, support RTL languages, lazy-load translations.


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