Azure AI Document Translation SDK for Python

Client library for Azure AI Translator document translation service for batch document translation with format preservation.

Installation

bash
pip install azure-ai-translation-document

Environment Variables

bash
AZURE_DOCUMENT_TRANSLATION_ENDPOINT=https://<resource>.cognitiveservices.azure.com
AZURE_DOCUMENT_TRANSLATION_KEY=<your-api-key>  # If using API key

# Storage for source and target documents
AZURE_SOURCE_CONTAINER_URL=https://<storage>.blob.core.windows.net/<container>?<sas>
AZURE_TARGET_CONTAINER_URL=https://<storage>.blob.core.windows.net/<container>?<sas>

Authentication

API Key

python
import os
from azure.ai.translation.document import DocumentTranslationClient
from azure.core.credentials import AzureKeyCredential

endpoint = os.environ["AZURE_DOCUMENT_TRANSLATION_ENDPOINT"]
key = os.environ["AZURE_DOCUMENT_TRANSLATION_KEY"]

client = DocumentTranslationClient(endpoint, AzureKeyCredential(key))

Entra ID (Recommended)

python
from azure.ai.translation.document import DocumentTranslationClient
from azure.identity import DefaultAzureCredential

client = DocumentTranslationClient(
    endpoint=os.environ["AZURE_DOCUMENT_TRANSLATION_ENDPOINT"],
    credential=DefaultAzureCredential()
)

Basic Document Translation

python
from azure.ai.translation.document import DocumentTranslationInput, TranslationTarget

source_url = os.environ["AZURE_SOURCE_CONTAINER_URL"]
target_url = os.environ["AZURE_TARGET_CONTAINER_URL"]

# Start translation job
poller = client.begin_translation(
    inputs=[
        DocumentTranslationInput(
            source_url=source_url,
            targets=[
                TranslationTarget(
                    target_url=target_url,
                    language="es"  # Translate to Spanish
                )
            ]
        )
    ]
)

# Wait for completion
result = poller.result()

print(f"Status: {poller.status()}")
print(f"Documents translated: {poller.details.documents_succeeded_count}")
print(f"Documents failed: {poller.details.documents_failed_count}")

Multiple Target Languages

python
poller = client.begin_translation(
    inputs=[
        DocumentTranslationInput(
            source_url=source_url,
            targets=[
                TranslationTarget(target_url=target_url_es, language="es"),
                TranslationTarget(target_url=target_url_fr, language="fr"),
                TranslationTarget(target_url=target_url_de, language="de")
            ]
        )
    ]
)

Translate Single Document

python
from azure.ai.translation.document import SingleDocumentTranslationClient

single_client = SingleDocumentTranslationClient(endpoint, AzureKeyCredential(key))

with open("document.docx", "rb") as f:
    document_content = f.read()

result = single_client.translate(
    body=document_content,
    target_language="es",
    content_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document"
)

# Save translated document
with open("document_es.docx", "wb") as f:
    f.write(result)

Check Translation Status

python
# Get all translation operations
operations = client.list_translation_statuses()

for op in operations:
    print(f"Operation ID: {op.id}")
    print(f"Status: {op.status}")
    print(f"Created: {op.created_on}")
    print(f"Total documents: {op.documents_total_count}")
    print(f"Succeeded: {op.documents_succeeded_count}")
    print(f"Failed: {op.documents_failed_count}")

List Document Statuses

python
# Get status of individual documents in a job
operation_id = poller.id
document_statuses = client.list_document_statuses(operation_id)

for doc in document_statuses:
    print(f"Document: {doc.source_document_url}")
    print(f"  Status: {doc.status}")
    print(f"  Translated to: {doc.translated_to}")
    if doc.error:
        print(f"  Error: {doc.error.message}")

Cancel Translation

python
# Cancel a running translation
client.cancel_translation(operation_id)

Using Glossary

python
from azure.ai.translation.document import TranslationGlossary

poller = client.begin_translation(
    inputs=[
        DocumentTranslationInput(
            source_url=source_url,
            targets=[
                TranslationTarget(
                    target_url=target_url,
                    language="es",
                    glossaries=[
                        TranslationGlossary(
                            glossary_url="https://<storage>.blob.core.windows.net/glossary/terms.csv?<sas>",
                            file_format="csv"
                        )
                    ]
                )
            ]
        )
    ]
)

Supported Document Formats

python
# Get supported formats
formats = client.get_supported_document_formats()

for fmt in formats:
    print(f"Format: {fmt.format}")
    print(f"  Extensions: {fmt.file_extensions}")
    print(f"  Content types: {fmt.content_types}")

Supported Languages

python
# Get supported languages
languages = client.get_supported_languages()

for lang in languages:
    print(f"Language: {lang.name} ({lang.code})")

Async Client

python
from azure.ai.translation.document.aio import DocumentTranslationClient
from azure.identity.aio import DefaultAzureCredential

async def translate_documents():
    async with DocumentTranslationClient(
        endpoint=endpoint,
        credential=DefaultAzureCredential()
    ) as client:
        poller = await client.begin_translation(inputs=[...])
        result = await poller.result()

Supported Formats

| Category | Formats | |----------|---------| | Documents | DOCX, PDF, PPTX, XLSX, HTML, TXT, RTF | | Structured | CSV, TSV, JSON, XML | | Localization | XLIFF, XLF, MHTML |

Storage Requirements

• Source and target containers must be Azure Blob Storage
• Use SAS tokens with appropriate permissions:
• Source: Read, List
• Target: Write, List

Best Practices

1. Use SAS tokens with minimal required permissions
2. Monitor long-running operations with poller.status()
3. Handle document-level errors by iterating document statuses
4. Use glossaries for domain-specific terminology
5. Separate target containers for each language
6. Use async client for multiple concurrent jobs
7. Check supported formats before submitting documents

When to Use

This skill is applicable to execute the workflow or actions described in the overview.

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.