Translate text (Advanced edition)

Translate input text by using Cloud Translation - Advanced (v3).

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For detailed documentation that includes this code sample, see the following:

Code sample

Go

Before trying this sample, follow the Go setup instructions in the Cloud Translation quickstart using client libraries. For more information, see the Cloud Translation Go API reference documentation.

To authenticate to Cloud Translation, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// 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

Before trying this sample, follow the Java setup instructions in the Cloud Translation quickstart using client libraries. For more information, see the Cloud Translation Java API reference documentation.

To authenticate to Cloud Translation, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// 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

Before trying this sample, follow the Node.js setup instructions in the Cloud Translation quickstart using client libraries. For more information, see the Cloud Translation Node.js API reference documentation.

To authenticate to Cloud Translation, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

/**
 * 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

Before trying this sample, follow the PHP setup instructions in the Cloud Translation quickstart using client libraries. For more information, see the Cloud Translation PHP API reference documentation.

To authenticate to Cloud Translation, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

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

Before trying this sample, follow the Python setup instructions in the Cloud Translation quickstart using client libraries. For more information, see the Cloud Translation Python API reference documentation.

To authenticate to Cloud Translation, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

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

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Code sample

Go

Java

Node.js

PHP

Python

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Translate text (Advanced edition)