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Text translation is a cloud-based feature of the Azure Translator in Foundry Tools service and is part of the Foundry Tool family of REST APIs. The Text translation API translates text between language pairs across all supported languages and dialects. If you already have a Translator or multi-service resource—whether used on its own or through Language Studio—you can continue to use those existing Translator resources within the Microsoft Foundry portal for NMT deployment.
By default, Azure Translator utilizes neural Machine Translation (NMT) technology. With the newest release, you now can optionally select either the standard NMT translation or a supported Large Language Model (LLM) deployment types, e.g., GPT-5.4. However, using an LLM model requires you to have a Foundry resource. For more information, see, Configure Azure resources.
The available 2026-06-06 API methods are listed in the following table:
| Request | Method | Description |
|---|---|---|
| languages | GET | Returns the set of languages currently supported by the translation, and transliteration methods. This request doesn't require authentication headers and you don't need a Translator resource to view the supported language set. |
| translate | POST | Translate specified source language text into the target language text. |
| transliterate | POST | Map source language script or alphabet to a target language script or alphabet. |
REST API code sample: translate
Request
{
"inputs": [
{
"text": "Ciao",
"language": "it",
"targets": [
{
"language": "en"
}
]
}
]
}
Response
{
"value": [
{
"translations": [
{
"language": "en",
"sourceCharacters": 4,
"text": "Hello"
}
]
}
]
}