Hi Steve,
Are you referring to incoming messages in Outlook or Word? Or, something else?
If it's for messages in Office Outlook or Word, click Review tab. You'll see Translate button there.
More details on the translate feature for Office
can be found from the following link:
http://office.microsoft.com/en-us/word-help/translate-text-in-a-different-language-HA010354288.aspx?CTT=1
If something else, give us more contexts, so that we can provide an appropriate response. Thanks.
Takako
Microsoft Translator