This document details the background knowledge that you need to use the Google Translate API v2.
- Learn about identifying your application
- Translate API background
- Calling style
This document is intended for developers who want to write applications that can interact with the Google Translate API. Google Translate is a tool that automatically translates text from one language to another language (e.g. French to English). You can use the Google Translate API to programmatically translate text in your webpages or apps.
To get started using Google Translate API, you need to first create or select a project in the Google Cloud Platform Console and enable the API. Using this link guides you through the process and activates the Google Translate API automatically.
Alternatively, you can activate the Google Translate API yourself in the Cloud Platform Console by doing the following:
- Open the Credentials page.
In either case, you end up on the Credentials page and can create your project's credentials from here.
Important: Google Translate API v2 requires billing information for all accounts before you can start using the service. See instructions below on how to enable billing.
To enable billing for your project, do the following:
- Go to the project settings page. If prompted, select a project or create a new one.
- In the Billing section, click Enable billing.
- If you do not have a billing account, create one.
- Select your location, fill out the form, and click Submit and enable billing.
Learn about identifying your application
Every request your application sends to the Google Translate API must identify your application to Google, using an API key.
For information about how to use API keys, see Identifying your application to Google in the Using REST document.
Translate API background
Google Translate is a tool that automatically translates text from one language to another language.
The source text is the text to be translated. The source language is the language that the source text is written in. The target language is language that the source text is translated into.
Translate API operations
There are three methods to invoke in the Google Translate API:
|Operation||Description||REST HTTP mapping|
|translate||Translates source text from source language to target language||
|languages||List the source and target languages supported by the translate methods||
|detect||Detect language of source text||
There are several ways to invoke the API:
REST, or Representational State Transfer, in the Google Translate API is somewhat different from traditional REST. Instead of providing access to resources, the API provides access to a service. As a result, the API provides a single URI that acts as the service endpoint.
You access the Google Translate API service endpoint using the
GET REST HTTP verb, as
described in API operations. You pass in the details of all service requests as query parameters.
The specific format for the single Google Translate API URI is:
Here is an example of how this works in the Translate API.
Discover supported languages
The specific format to return the list of languages codes is:
Here is an example of how languages method works in the Translate API.
Detect source language
The specific format to detect the language of a text is:
Here is an example of how detect method works in the Translate API.
callback query parameter and a callback function. However, be aware that your API key will be viewable in the HTML source for your page. By default a key can be used on any site. We strongly recommend that you restrict use of your key only to domains you administer, to prevent use on unauthorized sites.
You can specify which domains are allowed to use your API key by doing the following:
- Go to the Google Cloud Platform Console.
- Select a project.
- From the menu, select API Manager, then select an API.
- On the API's info page, select the Quota link near the API name.
- In the sidebar on the left, select API Access.
- Click the Edit allowed referers link in the Simple API Access section of the page.
The following example uses this approach to translate some text and put it below the source text: