---
title: "franc Natural Language Detection Library and CLI"
description: "franc is a JavaScript library and CLI tool for detecting the language of text. It supports up to 419 languages and returns ISO 639-3 codes, making it the most comprehensive open-source language detection tool available for Node.js."
verification: "security_reviewed"
source: "https://github.com/wooorm/franc"
category:
  - "Data Extraction & Transformation"
framework:
  - "Multi-Framework"
tool_ecosystem:
  github_repo: "wooorm/franc"
  github_stars: 4386
---

# franc Natural Language Detection Library and CLI

franc is a JavaScript library and CLI tool for detecting the language of text. It supports up to 419 languages and returns ISO 639-3 codes, making it the most comprehensive open-source language detection tool available for Node.js.

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/franc-natural-language-detection/)