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GET
/
v3
/
languages
Retrieve Languages
curl --request GET \
  --url https://api.deepl.com/v3/languages \
  --header 'Authorization: <api-key>'
[
  {
    "lang": "de",
    "name": "German",
    "usable_as_source": true,
    "usable_as_target": true,
    "features": [
      "formality",
      "tag_handling",
      "glossary"
    ]
  },
  {
    "lang": "en",
    "name": "English",
    "usable_as_source": true,
    "usable_as_target": false,
    "features": [
      "tag_handling",
      "glossary"
    ]
  },
  {
    "lang": "en-US",
    "name": "English (American)",
    "usable_as_source": false,
    "usable_as_target": true,
    "features": [
      "tag_handling",
      "glossary"
    ]
  }
]
This endpoint is available for testing in BETA. Breaking changes may be pushed with little or no advance notice, and we provide no guarantees of stability.

Authorizations

​
Authorization
string
header
default:DeepL-Auth-Key
required

Authentication with Authorization header and DeepL-Auth-Key authentication scheme. Example: DeepL-Auth-Key <api-key>

Query Parameters

​
product
enum<string>
required

The product to retrieve languages for. Supported values: translate_text, translate_document, glossary, voice, write, style_rules.

Available options:
translate_text,
translate_document,
glossary,
voice,
write,
style_rules

Response

JSON array where each item represents a supported language.

​
lang
string
required

The language code (BCP 47).

Example:

"de"

​
name
string
required

Name of the language in English.

Example:

"German"

​
usable_as_source
boolean
required

Whether this language can be used as a source language with the specified product.

​
usable_as_target
boolean
required

Whether this language can be used as a target language with the specified product.

​
features
enum<string>[]
required

Features supported for this language with the specified product. Always present; empty array if no optional features are supported. Consult /v3/languages/products to determine whether a feature must be present on the source language, target language, or both for a given product.

Available options:
formality,
custom_instructions,
tag_handling,
glossary,
writing_style,
tone
Example:
["formality", "tag_handling", "glossary"]