Select the 'Documents' tab:

Click on 'Browse your computer':

Select the document you wish to translate:

Click 'Open':

Select the Language the document is in, and then the language you wish to translate the document to:

Click the 'Translate' Button:

Once the document has translated, click the 'Download Translation' button:

The translated document is now in your downloads folder and can be uploaded or shared with the intended user(s).