mcpField
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i18n

i18n

Local
github.com/rog0xDeveloper Tools0Updated 32w ago
Repository

About i18n

An MCP server that provides internationalization and localization tools for AI agents. It detects locales, finds hardcoded strings, checks translation files, applies plural rules, and formats values by locale.

Key features

  1. 01Detect language and locale
  2. 02Extract strings for translation
  3. 03Check translation consistency
  4. 04Generate CLDR plural categories
  5. 05Format values for locales

Use cases

  1. 01Identify a text's likely language
  2. 02Find hardcoded interface text in source
  3. 03Check locale files for missing or mismatched entries
  4. 04Format dates and currencies for a locale

MCP support

Exposes internationalization and localization tools to MCP clients, including locale detection, source string extraction, translation analysis, plural rules, and locale formatting.

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "rog0x-i18n": {
      "command": "npx",
      "args": [
        "-y",
        "@rog0x/mcp-i18n-tools"
      ]
    }
  }
}
Run commandnpx -y @rog0x/mcp-i18n-tools

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
npm@rog0x/mcp-i18n-tools1.0.2

Tools

5

Saved tool list · updated 3w ago

ParameterTypeRequiredDescription
textstringYesThe text to analyze for language detection

Details

From the project README

@rog0x/mcp-i18n-tools

Internationalization and localization tools for AI agents, exposed as an MCP (Model Context Protocol) server.

Tools

detect_locale

Detect the language and locale of a given text string. Returns the detected language code (BCP 47), language name, writing script, confidence score (0-1), and alternate language candidates.

Supported languages: English, Spanish, French, German, Portuguese, Italian, Russian, Japanese, Korean, Chinese, Arabic, Hindi, Thai, Greek, Hebrew.

extract_i18n_keys

Extract hardcoded user-facing strings from source code that should be internationalized. Finds strings in:

  • JSX/TSX attributes (title, placeholder, label, alt, aria-label, etc.)
  • HTML template text and attributes
  • console.log / console.warn / console.error calls
  • throw new Error(...) messages
  • alert() / confirm() / prompt() dialogs
  • Variable assignments with i18n-relevant names (message, label, title, etc.)

Returns each string with its line/column, surrounding context, pattern type, and a suggested i18n key.

analyze_translations

Analyze translation JSON files for consistency across locales. Detects:

  • Missing keys — present in reference locale but absent in others
  • Extra keys — present in a locale but not in the reference
  • Structure mismatches — a key is a string in one locale but an object in another
  • Interpolation mismatches — {variable} placeholders differ between locales
  • Empty values — keys with blank translations
  • Unused keys — keys not referenced in source code (requires a list of used keys)
plural_rules

Generate plural form categories for a given locale following CLDR rules. Shows which plural categories the language uses and classifies any test numbers you provide.

LanguageCategories
Englishone, other
Frenchone, other
Russianone, few, many, other
Arabiczero, one, two, few, many, other
Polishone, few, many, other
Japaneseother
Chineseother
format_locale

Format numbers, currencies, dates, and relative times for any locale using the Intl APIs. Supports:

  • Numbers — decimal, percent, unit; compact/scientific/engineering notation
  • Currency — symbol, narrowSymbol, code, and name displays
  • Dates — short, medium, long, full styles with date parts breakdown
  • Relative time — long, short, narrow styles with auto-numeric formatting

Setup

npm install
npm run build

MCP Configuration

{
  "mcpServers": {
    "i18n-tools": {
      "command": "node",
      "args": ["D:/products/mcp-servers/mcp-i18n-tools/dist/index.js"]
    }
  }
}

License

MIT

Comments

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