Now go to the upload a document option, click browse and upload your pdf file. From the drop down boxes select the languages you want translated, on the left select the pdf language and on the right select the desired language (ex. english). It will take some time for the upload process to finish, but afterwards the file will be translated.

The bad news at the moment is that only 9 pages of the pdf can be translated. If you are looking for translation software, download babylon translator ( download link )

What language can you translate to/from ?
With this language translation tool you can translate any-to-any from the 51 supported languages:
Is the service free?
Yes the Translate PDF service is free like al lot of other Google’s services.

For a professional translation software download Babylon’s software

You can translate adobe acrobat documents, word documents, docs etc..