How could I use SDL Language Cloud to translate language with in a file in offline mode?

How could I use SDL Language Cloud to translate language with in a file  in offline mode?

My requirement is to convert the Arabic Content to  English related to a text fie. The server we use is highly secure and needs the translation to work in offline mode itself. I have downloaded   SDL Trans Video 2015 trial version but came to know language translation works with internet connectivity.  I want to know whether with  SDL Language Cloud   language translation works in offline mode