Hi fan:
If you are working on a Word *.doc file you can add in a Google toolbar
which has a translation feature-
http://toolbar.google.com/T4/index.html.
If you save your document in HTML, your Word will suddenly look more like a
web document, but unfortunately it doesn't seem to support layers as does
FrontPage where you can add in translation tools as seen here-
http://translate.google.com/translate_tools?hl=en.
You can pull up an empty Word document, right click anywhere and select
"translate". You can do an on-line MS Word Help search for "translation" and
it'll show you how to use the MS Word translation tools, which may be
enough... you can select a word, sentence, paragraph, etc to translate.
Then there is always the numerous purchase options on the 'net. Just do a
Google search for "adding translation tool to MS Word".
Al