Discovering supported languages (Basic)

This document describes how to use the Translation API (v2) to list supported languages.

Sending a supported languages request

You can discover the supported languages of this API by sending an HTTP request using a URL of the following format:

https://translation.googleapis.com/language/translate/v2/languages

Getting a list of supported languages

REST & CMD LINE

To get a list of all supported languages, make a GET request to the https://translation.googleapis.com/language/translate/v2/languages endpoint. The following shows an example of a GET request using curl and PowerShell. The example uses the access token for a service account set up for the project using the Google Cloud Platform Cloud SDK. For instructions on installing the Cloud SDK, setting up a project with a service account, and obtaining an access token, see the Quickstart.

HTTP method and URL:

GET https://translation.googleapis.com/language/translate/v2/languages

To send your request, choose one of these options:

curl

Execute the following command:

curl -X GET \
-H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
https://translation.googleapis.com/language/translate/v2/languages

PowerShell

Execute the following command:

$cred = gcloud auth application-default print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method GET `
-Headers $headers `
-Uri "https://translation.googleapis.com/language/translate/v2/languages " | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "languages": [
    {
      "language": "en"
    },
    {
      "language": "fr"
    },
    {
      "language": "zh-CN"
    }
  ]
}

This query returns iso-639-1 language codes for supported languages. Some language codes also include a country code, like zh-CN or zh-TW. The list is sorted alphabetically by language code. The above example has been shortened due to space constraints.

C#


using Google.Cloud.Translation.V2;
using System;
using System.Collections.Generic;

public partial class TranslateSample
{
    public IList<Language> ListLanguageCodes()
    {
        TranslationClient client = TranslationClient.Create();
        IList<Language> response = client.ListLanguages();
        foreach (var language in response)
        {
            Console.WriteLine(language.Code);
        }
        return response;
    }
}

Go

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/translate"
	"golang.org/x/text/language"
)

func listSupportedLanguages(w io.Writer, targetLanguage string) error {
	// targetLanguage := "th"
	ctx := context.Background()

	lang, err := language.Parse(targetLanguage)
	if err != nil {
		return fmt.Errorf("language.Parse: %v", err)
	}

	client, err := translate.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("translate.NewClient: %v", err)
	}
	defer client.Close()

	langs, err := client.SupportedLanguages(ctx, lang)
	if err != nil {
		return fmt.Errorf("SupportedLanguages: %v", err)
	}

	for _, lang := range langs {
		fmt.Fprintf(w, "%q: %s\n", lang.Tag, lang.Name)
	}

	return nil
}

Java

// TODO(developer): Uncomment these lines.
// import com.google.cloud.translate.*;
// Translate translate = TranslateOptions.getDefaultInstance().getService();

List<Language> languages = translate.listSupportedLanguages();

for (Language language : languages) {
  System.out.printf("Name: %s, Code: %s\n", language.getName(), language.getCode());
}

Node.js

// Imports the Google Cloud client library
const {Translate} = require('@google-cloud/translate').v2;

// Creates a client
const translate = new Translate();

async function listLanguages() {
  // Lists available translation language with their names in English (the default).
  const [languages] = await translate.getLanguages();

  console.log('Languages:');
  languages.forEach(language => console.log(language));
}

listLanguages();

PHP

use Google\Cloud\Translate\TranslateClient;

$translate = new TranslateClient();
foreach ($translate->languages() as $code) {
    print("$code\n");
}

Python

"""Lists all available languages."""
from google.cloud import translate_v2 as translate
translate_client = translate.Client()

results = translate_client.get_languages()

for language in results:
    print(u'{name} ({language})'.format(**language))

Ruby

# project_id = "Your Google Cloud project ID"

require "google/cloud/translate"

translate = Google::Cloud::Translate.new version: :v2, project_id: project_id
languages = translate.languages

puts "Supported language codes:"
languages.each do |language|
  puts language.code
end

Listing supported languages in target language

REST & CMD LINE

Here is another example that returns the list of supported languages. The returned language names are written in a specified target language. The returned list is sorted alphabetically according to the target language.

To list supported languages in a target language, make a POST request and provide JSON that identifies the target language in the request body. The following shows an example of a POST request using curl or PowerShell.

HTTP method and URL:

POST https://translation.googleapis.com/language/translate/v2/languages

Request JSON body:

{
    "target": "zh-TW"
}

To send your request, choose one of these options:

curl

Save the request body in a file called request.json, and execute the following command:

curl -X POST \
-H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
https://translation.googleapis.com/language/translate/v2/languages

PowerShell

Save the request body in a file called request.json, and execute the following command:

$cred = gcloud auth application-default print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
-Method POST `
-Headers $headers `
-ContentType: "application/json; charset=utf-8" `
-InFile request.json `
-Uri "https://translation.googleapis.com/language/translate/v2/languages " | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "data": {
    "languages": [
      {
        "language": "zh-CN",
        "name": "中文(簡體)"
      },
      {
        "language": "fr",
        "name": "法文"
      },
      {
        "language": "en",
        "name": "英文"
      }
    ]
  }
}

In this case, the query returns the same language codes as above, along with name strings that give the names of the languages written in the target language, zh-TW. The above example has been shortened due to space constraints.

C#


using Google.Cloud.Translation.V2;
using System;
using System.Collections.Generic;

public partial class TranslateSample
{
    public IList<Language> ListLanguageNames()
    {
        TranslationClient client = TranslationClient.Create();
        // List all the languages in English.
        IList<Language> languages = client.ListLanguages(target: "en");
        foreach (var language in languages)
        {
            Console.WriteLine($"{language.Code}\t{language.Name}");
        }
        return languages;
    }
}

Go

import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/translate"
	"golang.org/x/text/language"
)

func listSupportedLanguages(w io.Writer, targetLanguage string) error {
	// targetLanguage := "th"
	ctx := context.Background()

	lang, err := language.Parse(targetLanguage)
	if err != nil {
		return fmt.Errorf("language.Parse: %v", err)
	}

	client, err := translate.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("translate.NewClient: %v", err)
	}
	defer client.Close()

	langs, err := client.SupportedLanguages(ctx, lang)
	if err != nil {
		return fmt.Errorf("SupportedLanguages: %v", err)
	}

	for _, lang := range langs {
		fmt.Fprintf(w, "%q: %s\n", lang.Tag, lang.Name)
	}

	return nil
}

Java

// TODO(developer): Uncomment these lines.
// import com.google.cloud.translate.*;
// Translate translate = TranslateOptions.getDefaultInstance().getService();

List<Language> languages =
    translate.listSupportedLanguages(Translate.LanguageListOption.targetLanguage("es"));

for (Language language : languages) {
  System.out.printf("Name: %s, Code: %s\n", language.getName(), language.getCode());
}

Node.js

// Imports the Google Cloud client library
const {Translate} = require('@google-cloud/translate').v2;

// Creates a client
const translate = new Translate();

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
// const target = 'The target language for language names, e.g. ru';

async function listLanguagesWithTarget() {
  // Lists available translation language with their names in a target language
  const [languages] = await translate.getLanguages(target);

  console.log('Languages:');
  languages.forEach(language => console.log(language));
}

listLanguagesWithTarget();

PHP

use Google\Cloud\Translate\TranslateClient;

/** Uncomment and populate these variables in your code */
// $targetLanguage = 'en'; // Language to print the language names in

$translate = new TranslateClient();
$result = $translate->localizedLanguages([
    'target' => $targetLanguage,
]);
foreach ($result as $lang) {
    printf('%s: %s' . PHP_EOL, $lang['code'], $lang['name']);
}

Python

"""Lists all available languages and localizes them to the target language.

Target must be an ISO 639-1 language code.
See https://g.co/cloud/translate/v2/translate-reference#supported_languages
"""
from google.cloud import translate_v2 as translate
translate_client = translate.Client()

results = translate_client.get_languages(target_language=target)

for language in results:
    print(u'{name} ({language})'.format(**language))

Ruby

# project_id = "Your Google Cloud project ID"

# To receive the names of the supported languages, provide the code
# for the language in which you wish to receive the names
# language_code = "en"

require "google/cloud/translate"

translate = Google::Cloud::Translate.new version: :v2, project_id: project_id
languages = translate.languages language_code

puts "Supported languages:"
languages.each do |language|
  puts "#{language.code} #{language.name}"
end

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