Babylon for MAC does not include document translation.
If and when a new version of this product will be developed, we will do our best to include this great feature.
Meanwhile, if you have a windows based machine, you can install Babylon NG and enjoy this great feature.
Please note that this is a premium feature which is not included within the FREE version of Babylon and requires you to purchase it.
If you have any further questions, please don't hesitate to contact us.