Bonjour! Not just for Microsoft Excel, this latest update to the Office 365 "mainstream" collection also works in Word and PowerPoint (there's even an add-in for Outlook too). Located on the 'Review' tab of the Ribbon in the 'Language' grouping (of just one item presently!), 'Translate' allows you to, er, translate from one language to another.
All you have to do is highlight the cell or text you want to translate and then click on the button. In Word or PowerPoint, you will then have to select 'Insert', but in Excel you simply copy the data into the 'Translator' pane.
Se trè fasil pou sèvi ak tradiktè a!