This page shows how to get started with the Cloud Client Libraries for the
Cloud Translation API. Client libraries make it easier to access
Google Cloud APIs from a supported language. Although you can use
Google Cloud APIs directly by making raw requests to the server, client
libraries provide simplifications that significantly reduce the amount of code
you need to write.

Read more about the Cloud Client Libraries
and the older Google API Client Libraries in
[Client libraries explained](https://docs.cloud.google.com/apis/docs/client-libraries-explained.md.txt).

## Install the client library

### C++

See [Setting Up a C++ Development Environment](https://docs.cloud.google.com/cpp/docs/setup.md.txt).

### C#

```
nuget install Google.Cloud.Translate.V3 -Pre
```

For more information, see [Setting Up a C# Development Environment](https://docs.cloud.google.com/dotnet/docs/setup.md.txt).

### Go

```
go get cloud.google.com/go/translate/apiv3
```

For more information, see [Setting Up a Go Development Environment](https://docs.cloud.google.com/go/docs/setup.md.txt).

### Java

> [!CAUTION]
> **Caution:** The Java client library does not support Android.

If you are using [Maven](https://maven.apache.org/), add
the following to your `pom.xml` file. For more information about
BOMs, see [The Google Cloud Platform Libraries BOM](https://cloud.google.com/java/docs/bom).

```java
<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.google.cloud</groupId>
      <artifactId>libraries-bom</artifactId>
      <version>26.90.0</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-translate</artifactId>
  </dependency>
</dependencies>
```

If you are using [Gradle](https://gradle.org/),
add the following to your dependencies:

```java
implementation platform('com.google.cloud:libraries-bom:26.90.0')

implementation 'com.google.cloud:google-cloud-translate'
```

If you are using [sbt](https://www.scala-sbt.org/), add
the following to your dependencies:

```java
libraryDependencies += "com.google.cloud" % "google-cloud-translate" % "2.102.0"
```

If you're using Visual Studio Code or IntelliJ, you can add client libraries to your
project using the following IDE plugins:

- [Cloud Code for VS Code](https://docs.cloud.google.com/code/docs/vscode/client-libraries.md.txt)
- [Cloud Code for IntelliJ](https://docs.cloud.google.com/code/docs/intellij/client-libraries.md.txt)

The plugins provide additional functionality, such as key management for service accounts. Refer
to each plugin's documentation for details.

> [!NOTE]
> **Note:** Cloud Java client libraries do not currently support Android.

For more information, see [Setting Up a Java Development Environment](https://docs.cloud.google.com/java/docs/setup.md.txt).

### Node.js


For more on setting up your Node.js development environment, refer to the
[Node.js Development Environment Setup Guide](https://docs.cloud.google.com/nodejs/docs/setup.md.txt).

```
npm install @google-cloud/translate
```

For more information, see [Setting Up a Node.js Development Environment](https://docs.cloud.google.com/nodejs/docs/setup.md.txt).

### PHP

```
composer require google/cloud-translate
```

For more information, see [Using PHP on Google Cloud](https://docs.cloud.google.com/php/docs.md.txt).

### Python


For more on setting up your Python development environment, refer to the
[Python Development Environment Setup Guide](https://docs.cloud.google.com/python/docs/setup.md.txt).

```
pip install --upgrade google-cloud-translate
```

For more information, see [Setting Up a Python Development Environment](https://docs.cloud.google.com/python/docs/setup.md.txt).

### Ruby


For more on setting up your Ruby development environment, refer to the
[Ruby Development Environment Setup Guide](https://docs.cloud.google.com/ruby/docs/setup.md.txt).

```
gem install google-cloud-translate
```

For more information, see [Setting Up a Ruby Development Environment](https://docs.cloud.google.com/ruby/docs/setup.md.txt).

<br />

## Set up authentication

To authenticate calls to Google Cloud APIs, client libraries support [Application Default Credentials (ADC)](https://docs.cloud.google.com/docs/authentication/application-default-credentials.md.txt); the libraries look for credentials in a set of defined locations and use those credentials to authenticate requests to the API. With ADC, you can make credentials available to your application in a variety of environments, such as local development or production, without needing to modify your application code.

For production environments, the way you set up ADC depends on the service
and context. For more information, see [Set up Application Default Credentials](https://docs.cloud.google.com/docs/authentication/provide-credentials-adc.md.txt).

For a local development environment, you can set up ADC with the credentials
that are associated with your Google Account:

1.
   [Install](https://docs.cloud.google.com/sdk/docs/install) the Google Cloud CLI.

   After installation,
   [initialize](https://docs.cloud.google.com/sdk/docs/initializing) the Google Cloud CLI by running the following command:

   ```bash
   gcloud init
   ```


   If you're using an external identity provider (IdP), you must first
   [sign in to the gcloud CLI with your federated identity](https://docs.cloud.google.com/iam/docs/workforce-log-in-gcloud.md.txt).
2.

   If you're using a local shell, then create local authentication credentials for your user
   account:

   ```bash
   gcloud auth application-default login
   ```

   You don't need to do this if you're using Cloud Shell.


   If an authentication error is returned, and you are using an external identity provider
   (IdP), confirm that you have
   [signed in to the gcloud CLI with your federated identity](https://docs.cloud.google.com/iam/docs/workforce-log-in-gcloud.md.txt).


   A sign-in screen appears. After you sign in, your credentials are stored in the
   [local credential file used by ADC](https://docs.cloud.google.com/docs/authentication/application-default-credentials.md.txt#personal).

## Use the client library


The following example shows how to use the client library.

### Go

```go
// Imports the Google Cloud Translation library
import (
	"context"
	"fmt"
	"io"

	translate "cloud.google.com/go/translate/apiv3"
	"cloud.google.com/go/translate/apiv3/translatepb"
)

func translateText(w io.Writer, projectID string, sourceLang string, targetLang string, text string) error {
	// projectID := "your-project-id"
	// sourceLang := "en-US"
	// targetLang := "fr"
	// text := "Text you wish to translate"

	// Instantiates a client
	ctx := context.Background()
	client, err := translate.NewTranslationClient(ctx)
	if err != nil {
		return fmt.Errorf("NewTranslationClient: %w", err)
	}
	defer client.Close()

	// Construct request
	req := &translatepb.TranslateTextRequest{
		Parent:             fmt.Sprintf("projects/%s/locations/global", projectID),
		SourceLanguageCode: sourceLang,
		TargetLanguageCode: targetLang,
		MimeType:           "text/plain", // Mime types: "text/plain", "text/html"
		Contents:           []string{text},
	}

	resp, err := client.TranslateText(ctx, req)
	if err != nil {
		return fmt.Errorf("TranslateText: %w", err)
	}

	// Display the translation for each input text provided
	for _, translation := range resp.GetTranslations() {
		fmt.Fprintf(w, "Translated text: %v\n", translation.GetTranslatedText())
	}

	return nil
}
```

### Java

```java
// Imports the Google Cloud Translation library.
import com.google.cloud.translate.v3.LocationName;
import com.google.cloud.translate.v3.TranslateTextRequest;
import com.google.cloud.translate.v3.TranslateTextResponse;
import com.google.cloud.translate.v3.Translation;
import com.google.cloud.translate.v3.TranslationServiceClient;
import java.io.IOException;


public class TranslateText {

  // Set and pass variables to overloaded translateText() method for translation.
  public static void translateText() throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "YOUR-PROJECT-ID";
    // Supported Languages: https://cloud.google.com/translate/docs/languages
    String targetLanguage = "your-target-language";
    String text = "your-text";
    translateText(projectId, targetLanguage, text);
  }

  // Translate text to target language.
  public static void translateText(String projectId, String targetLanguage, String text)
      throws IOException {

    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    try (TranslationServiceClient client = TranslationServiceClient.create()) {
      // Supported Locations: `global`, [glossary location], or [model location]
      // Glossaries must be hosted in `us-central1`
      // Custom Models must use the same location as your model. (us-central1)
      LocationName parent = LocationName.of(projectId, "global");

      // Supported Mime Types: https://cloud.google.com/translate/docs/supported-formats
      TranslateTextRequest request =
          TranslateTextRequest.newBuilder()
              .setParent(parent.toString())
              .setMimeType("text/plain")
              .setTargetLanguageCode(targetLanguage)
              .addContents(text)
              .build();

      TranslateTextResponse response = client.translateText(request);

      // Display the translation for each input text provided
      for (Translation translation : response.getTranslationsList()) {
        System.out.printf("Translated text: %s\n", translation.getTranslatedText());
      }
    }
  }
}
```

### Node.js

```javascript
/**
 * TODO(developer): Uncomment these variables before running the sample
 */
// const projectId = 'YOUR_PROJECT_ID';
// const location = 'global';
// const text = 'text to translate';

// Imports the Google Cloud Translation library
const {TranslationServiceClient} = require('@google-cloud/translate');

// Instantiates a client
const translationClient = new TranslationServiceClient();

async function translateText() {
  // MIME type of the content to translate
  // Supported MIME types:
  // https://cloud.google.com/translate/docs/supported-formats
  const mimeType = 'text/plain';

  // Construct request
  const request = {
    parent: `projects/${projectId}/locations/${location}`,
    contents: [text],
    mimeType: mimeType,
    sourceLanguageCode: 'en',
    targetLanguageCode: 'sr-Latn',
  };

  // Run request
  const [response] = await translationClient.translateText(request);

  for (const translation of response.translations) {
    console.log(`Translation: ${translation.translatedText}`);
  }
}

translateText();
```

### PHP

```php
use Google\Cloud\Translate\V3\Client\TranslationServiceClient;
use Google\Cloud\Translate\V3\TranslateTextRequest;

/**
 * @param string $text           The text to translate.
 * @param string $targetLanguage Language to translate to.
 * @param string $projectId      Your Google Cloud project ID.
 */
function v3_translate_text(
    string $text,
    string $targetLanguage,
    string $projectId
): void {
    $translationServiceClient = new TranslationServiceClient();

    $contents = [$text];
    $formattedParent = $translationServiceClient->locationName($projectId, 'global');

    try {
        $request = (new TranslateTextRequest())
            ->setContents($contents)
            ->setTargetLanguageCode($targetLanguage)
            ->setParent($formattedParent);
        $response = $translationServiceClient->translateText($request);

        // Display the translation for each input text provided
        foreach ($response->getTranslations() as $translation) {
            printf('Translated text: %s' . PHP_EOL, $translation->getTranslatedText());
        }
    } finally {
        $translationServiceClient->close();
    }
}
```

### Python

```python
import os

# Import the Google Cloud Translation library.
from google.cloud import translate_v3

PROJECT_ID = os.environ.get("GOOGLE_CLOUD_PROJECT")


def translate_text(
    text: str = "YOUR_TEXT_TO_TRANSLATE",
    source_language_code: str = "en-US",
    target_language_code: str = "fr",
) -> translate_v3.TranslationServiceClient:
    """Translate Text from a Source language to a Target language.
    Args:
        text: The content to translate.
        source_language_code: The code of the source language.
        target_language_code: The code of the target language.
            For example: "fr" for French, "es" for Spanish, etc.
            Find available languages and codes here:
            https://cloud.google.com/translate/docs/languages#neural_machine_translation_model
    """

    # Initialize Translation client.
    client = translate_v3.TranslationServiceClient()
    parent = f"projects/{PROJECT_ID}/locations/global"

    # MIME type of the content to translate.
    # Supported MIME types:
    # https://cloud.google.com/translate/docs/supported-formats
    mime_type = "text/plain"

    # Translate text from the source to the target language.
    response = client.translate_text(
        contents=[text],
        parent=parent,
        mime_type=mime_type,
        source_language_code=source_language_code,
        target_language_code=target_language_code,
    )

    # Display the translation for the text.
    # For example, for "Hello! How are you doing today?":
    # Translated text: Bonjour comment vas-tu aujourd'hui?
    for translation in response.translations:
        print(f"Translated text: {translation.translated_text}")

    return response
```

<br />

## Additional resources

### C++

The following list contains links to more resources related to the
client library for C++:

- [API reference](https://docs.cloud.google.com/cpp/docs/reference/translate/latest.md.txt)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/google-cloud-cpp/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D%5Bc%2B%2B%5D)
- [Source code](https://github.com/googleapis/google-cloud-cpp)

### C#

The following list contains links to more resources related to the
client library for C#:

- [API reference](https://docs.cloud.google.com/dotnet/docs/reference/Google.Cloud.Translate.V3/latest.md.txt)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/google-cloud-dotnet/tree/master/apis/Google.Cloud.Translate.V3/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bc%23%5D)
- [Source code](https://github.com/googleapis/google-cloud-dotnet/tree/master/apis/Google.Cloud.Translate.V3)

### Go

The following list contains links to more resources related to the
client library for Go:

- [API reference](https://godoc.org/cloud.google.com/go/translate/apiv3)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/GoogleCloudPlatform/google-cloud-go/tree/master/translate/apiv3/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bgo%5D)
- [Source code](https://github.com/GoogleCloudPlatform/google-cloud-go/tree/master/translate/apiv3)

### Java

The following list contains links to more resources related to the
client library for Java:

- [API reference](https://docs.cloud.google.com/java/docs/reference/google-cloud-translate/latest/com.google.cloud.translate.md.txt)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/java-translate/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bjava%5D)
- [Source code](https://github.com/googleapis/java-translate)

### Node.js

The following list contains links to more resources related to the
client library for Node.js:

- [API reference](https://googleapis.dev/nodejs/translate/latest/index.html)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/nodejs-translate/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bnode.js%5D)
- [Source code](https://github.com/googleapis/nodejs-translate)

### PHP

The following list contains links to more resources related to the
client library for PHP:

- [API reference](https://googleapis.github.io/google-cloud-php/#/docs/google-cloud/v0.116.0/translate/v3/readme)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/google-cloud-php-translate/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bphp%5D)
- [Source code](https://github.com/googleapis/google-cloud-php-translate)

### Python

The following list contains links to more resources related to the
client library for Python:

- [API reference](https://docs.cloud.google.com/python/docs/reference/translate/latest.md.txt)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/python-translate#python-client-for-google-cloud-translation/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bpython%5D)
- [Source code](https://github.com/googleapis/python-translate#python-client-for-google-cloud-translation)

### Ruby

The following list contains links to more resources related to the
client library for Ruby:

- [API reference](https://googleapis.dev/ruby/google-cloud-translate/latest/Google/Cloud/Translate/V3.html)
- [Client libraries best practices](https://docs.cloud.google.com/apis/docs/client-libraries-best-practices.md.txt)
- [Issue tracker](https://github.com/googleapis/google-cloud-ruby/tree/master/google-cloud-translate/issues)
- [`google-translate` on Stack Overflow](https://stackoverflow.com/search?q=%5Bgoogle-translate%5D+%5Bruby%5D)
- [Source code](https://github.com/googleapis/google-cloud-ruby/tree/master/google-cloud-translate)

<br />