What is Azure Text translation in Foundry Tools?

Azure Translator in Foundry Tools is a cloud-based REST API feature of Translator that uses neural machine translation technology to enable quick and accurate source-to-target text translation in real time across all supported languages. In this overview, you learn how the Text translation REST APIs enable you to build intelligent solutions for your applications and workflows.

Text translation documentation contains the following article types:

Quickstarts. Getting-started instructions to guide you through making requests to the service.
How-to guides. Instructions for accessing and using the service in more specific or customized ways.
Reference articles. REST API documentation and programming language-based content.

With the latest preview release, you now can optionally select either the standard neural machine translation (NMT) or a Large Language Model (LLM) deployment (GPT-4o-mini or GPT-4o). However, using an LLM model requires you to have a Microsoft Foundry resource. For more information, see configure Azure resources.

Languages. Returns a list of languages supported by the Translate and Transliterate APIs. This request doesn't require authentication; just copy and paste the following GET request into your preferred REST API tool or browser:
```
    https://api.cognitive.microsofttranslator.com/languages?api-version=2025-10-01-preview
```
Translate. Renders single source-language text to multiple target-language texts with a single POST request:
Transliterate. Converts characters or letters of a source language to the corresponding characters or letters of a target language with a single POST request.

Languages. Returns a list of languages supported by Translate, Transliterate, and Dictionary Lookup operations. This request doesn't require authentication; just copy and paste the following GET request into your favorite REST API tool or browser:
```
https://api.cognitive.microsofttranslator.com/languages?api-version=3.0
```
Translate. Renders single source-language text to multiple target-language texts with a single request.
Transliterate. Converts characters or letters of a source language to the corresponding characters or letters of a target language.
Detect. Returns the source code language code and a boolean variable denoting whether the detected language is supported for text translation and transliteration.

Note

You can Translate, Transliterate, and Detect text with a single REST API call .
Dictionary lookup. Returns equivalent words for the source term in the target language.
Dictionary example Returns grammatical structure and context examples for the source term and target term pair.

Text translation development options

Add Text translation to your projects and applications using the following resources:

Development option	Description
Foundry	• Foundry (classic) portal is a cloud-based AI platform that supports hub-based projects and other resource types. •Foundry (new) portal is a cloud-based AI platform that provides streamlined access to Foundry models, agents, and tools through Foundry projects.
REST API	Integrate translation into your applications using the REST API (GA) version or REST API (preview) version.
Client libraries (SDKs)	Get started integrating translation capabilities into your applications using one of our client libraries (SDKs) available in various programming languages.
Docker container	• To use the Translator container, you must complete and submit the Foundry Tools application for Gated Services online request form for approval for access to the container. • The Translator container image supports limited features compared to cloud offerings. For more information, see Container: Translate Text.

Data residency

Text translation data residency depends on the Azure region where your Translator resource was created:

Text translation data residency

✔️ Feature: Translator Text

Service endpoint	Request processing data center
Global (recommended): `api.cognitive.microsofttranslator.com`	Closest available data center.
Americas: `api-nam.cognitive.microsofttranslator.com`	East US 2 • West US 2
Asia Pacific: `api-apc.cognitive.microsofttranslator.com`	Japan East • Southeast Asia
Europe (except Switzerland): `api-eur.cognitive.microsofttranslator.com`	France Central • West Europe
Switzerland: For more information, see Switzerland service endpoints.	Switzerland North • Switzerland West

Switzerland service endpoints

Customers with a resource located in Switzerland North or Switzerland West can ensure that their Text API requests are served within Switzerland. To ensure that requests are handled in Switzerland, create the Translator resource in the Resource region Switzerland North or Switzerland West, then use the resource's custom endpoint in your API requests.

For example: If you create a Translator resource in Azure portal with Resource region as Switzerland North and your resource name is my-swiss-n, then your custom endpoint is https://my-swiss-n.cognitiveservices.azure.com. And a sample request to translate is:

// Pass secret key and region using headers to a custom endpoint
curl -X POST "https://my-swiss-n.cognitiveservices.azure.com/translator/text/v3.0/translate?to=fr" \
-H "Ocp-Apim-Subscription-Key: xxx" \
-H "Ocp-Apim-Subscription-Region: switzerlandnorth" \
-H "Content-Type: application/json" \
-d "[{'Text':'Hello'}]" -v

Custom Translator isn't currently available in Switzerland.

Get started with Text translation

Ready to begin?

Create a Translator resource in the Azure portal.
Get your access keys and API endpoint. An endpoint URL and read-only key are required for authentication.
Explore our Quickstart "Learn to Use the Translator via REST and a preferred programming language.") and view use cases and code samples for the following programming languages:

Next steps

Dive deeper into the Text translation REST API:

See the REST API reference

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Last updated on 2025-11-18