Why is this better than asking Claude to detect the language?

LLMs often hallucinate languages for short strings or names. They also struggle to provide standardized ISO codes reliably. This engine uses mathematical N-gram analysis (the same technique behind Google Search language detection) to deterministically map text to one of 400+ ISO 639-3 codes.

What does it mean if it returns 'und'?

'und' stands for Undefined. It means the text is too short, mostly numbers, or too ambiguous to confidently map to a single language. This is a feature — it prevents your routing logic from making false assumptions.

Can I force it to choose between specific languages?

Yes. Pass an array of ISO 639-3 codes to the 'only' parameter (e.g., ['eng', 'por', 'spa']). The engine will only calculate probabilities within that subset.

Language Detector Engine MCP Connector for Claude

A+

Detect the language of any text local using exact n-gram analysis. Supports 400+ languages. When AI guesses wrong on short or mixed text, this engine proves it.

1 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

Your customer support agent receives a ticket: 'O produto não chegou'. The AI routes it to the Spanish queue. The agent wastes time, the customer gets angry, SLA drops. Why? Because the AI 'guessed' the language probabilistically instead of calculating it.

This MCP uses franc (200K+ weekly downloads, inspired by Google's CLD2) to perform deterministic N-gram language detection. It returns exact ISO 639-3 codes for over 400 languages, and properly returns 'undefined' if a text is too ambiguous rather than hallucinating.

The Superpowers

400+ Languages: From English (eng) and Portuguese (por) to Esperanto (epo) and Zulu (zul).
Exact N-gram Math: Analyzes text strictly by character frequencies, not LLM probability.
Whitelist/Blacklist: Know the text must be either Spanish or Portuguese? Pass only: ['spa', 'por'] to force a strict evaluation.
Confidence Scores: Use the all flag to get an array of all matches with their exact probability scores.

n-gram-analysislanguage-detectiondeterministic-logictext-processinglocalizationdata-validation

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_DZfpdhfq3SUunsFFJJgaaLCPk3BDMKLefzz6agcr/mcp

② Claude Code (terminal)

claude mcp add --transport http language-detector-engine https://edge.vinkius.com/vk_preview_DZfpdhfq3SUunsFFJJgaaLCPk3BDMKLefzz6agcr/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "language-detector-engine": {
      "url": "https://edge.vinkius.com/vk_preview_DZfpdhfq3SUunsFFJJgaaLCPk3BDMKLefzz6agcr/mcp"
    }
  }
}

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