You can translate a document into any language, creating a new document. The translated document will open in a new window. Only documents can be translated at present, and not spreadsheets or presentations.
An entire document can be translated as follows:
Ensure the document is open
Click on the Tools menu, then choose Translate Document
Enter a new name for the translated document if required
Choose the language you wish to translate all document text into
Click on Translate
A new document will open in a new browser tab containing the translated text.