list-languages

Example: List Languages

Retrieve all supported source and target languages for the DeepL Translate API.

Files

File	Description
curl.sh	Minimal curl reference commands (source and target)
node/	Node.js implementation
python/	Python implementation

Quick start

# Node.js
cd node && npm install && DEEPL_API_KEY=your-key node index.js

# Python
cd python && pip install -r requirements.txt && DEEPL_API_KEY=your-key python main.py

What it does

1. Reads DEEPL_API_KEY from the environment.
2. Calls GET /v2/languages?type=source and prints each source language code and name.
3. Calls GET /v2/languages?type=target and prints each target language code and name, flagging languages that support the formality parameter.

Prerequisites

• A DeepL API key (sign up free)
• Node.js >= 18 or Python >= 3.8

Sample response

Source languages (GET /v2/languages?type=source):

[
  { "language": "BG", "name": "Bulgarian" },
  { "language": "CS", "name": "Czech" },
  { "language": "DA", "name": "Danish" },
  { "language": "DE", "name": "German" },
  { "language": "EN", "name": "English" },
  { "language": "FR", "name": "French" }
]

Target languages (GET /v2/languages?type=target):

[
  { "language": "BG", "name": "Bulgarian", "supports_formality": false },
  { "language": "CS", "name": "Czech", "supports_formality": false },
  { "language": "DA", "name": "Danish", "supports_formality": false },
  { "language": "DE", "name": "German", "supports_formality": true },
  { "language": "EN-GB", "name": "English (British)", "supports_formality": false },
  { "language": "EN-US", "name": "English (American)", "supports_formality": false },
  { "language": "FR", "name": "French", "supports_formality": true }
]