Detect Language API

by detectlanguage.com

Language and text Added on November 1st, 2026 Checked and working on November 1st, 2026

What it does

Detect Language identifies the language of a piece of text, for example to route support messages or pick the right translation. Send text to the REST endpoint with your API key in an Authorization header and get JSON with the detected language codes and a confidence score, also for batches of texts. Client libraries exist for many programming languages. Free with a free API key: 1,000 requests and 1 MB of text a day; paid plans raise the limits.

API
JSON
REST

At a glance

API key: Needed, free · More APIs with a free key
Pricing: Free with a free API key: 1,000 requests and 1 MB of text a day; paid plans raise the limits.
Formats: JSON
Interface: REST
Provider: detectlanguage.com
Last checked: Working on November 1st, 2026

More information: https://detectlanguage.com/documentation

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HTML

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Markdown

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Detect Language API — detectlanguage.com

Example request

curl

curl -X POST 'https://ws.detectlanguage.com/v3/detect' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"q": "hello"}'

JavaScript

const response = await fetch("https://ws.detectlanguage.com/v3/detect", {
  method: 'POST',
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"q":"hello"}),
});
const data = await response.json();
console.log(data);

Python

import requests

response = requests.post(
    "https://ws.detectlanguage.com/v3/detect",
    headers={
        "Authorization": "Bearer YOUR_API_KEY",
        "Content-Type": "application/json",
    },
    json={
        "q": "hello",
    },
    timeout=30,
)
print(response.json())

Replace YOUR_API_KEY with your own key.