How to prevent webpages translated with Google Translate Plugin from being indexed?

Question

I've been reading the information here https://support.google.com/translate/#2534535 about the Google Translate plugin. At first I thought that if I used the plugin my site wouldn't be indexed, but then I can see that the following quote

The automatically translated version of your web page will not be indexed by search engines.

is actually referring to Google Translate and not the plugin....or at least that's what I think.

QUESTIONS

1. I'd like to confirm whether or not websites that use the Google Translate Plugin are indexed.

2. If the answer is yes, then I'd like to know how to stop these translated pages from being indexed. I've read that you can use robots.txt to prevent it, but I'd really like to see an example of how to implement this- I'm confused as to what the translated url would be.

EDIT

Just to be clear, I don't want the translated content to be indexed. I still want the original content to be indexed!!!

Answer 1

The Google Translator Plugin uses JavaScript to fetch translations for the page from Google servers and replace the original text dynamically.

This data is fetched from under the URL: http://translate.googleapis.com/translate_a/. Google has a robots.txt file that prohibits crawling of translate_a: http://translate.googleapis.com/robots.txt

Only your English content will be indexed, not the translated content:

• Your pages are served normally with English text in the page where Googlebot can find it
• Complex JavaScript is needed to fetch the translations (Googlebot wouldn't normally do that)
• Even if Googlebot did execute the Javascript, it wouldn't fetch and index the translations as they are blocked by robots.txt