If you want to translate a file into English for example from any language, you can do it online for free with google translator.

How to translate the pdf document online?

Basically what you need to do is go to google translate, upload the file and select the language in the ‘from’ and ‘to’ fields.

The process:

• Open http://translate.google.com
• 

• Select the upload a document (here you select your translation pdf)
• Browse your computer for the file and click select
• Click upload (depending of your document size, the process can take a while)
• Where it says Detect language, select the language in the pdf document, if you dont know what language it is leave it empty
• On the right, select your language (the language you want to translate to)
• Click translate and wait for the translation pdf to end
• Thats it! The translation is done

If you are looking for a professional translation software, try babylon translator.