Currently Being ModeratedOct 14, 2013 6:02 AM (in response to SPLondon)
Word for Mac has never supported any Indic script. You can use any other app, but not that one.
You can't switch languages by changing fonts on modern computers. You have to activate the keyboard for the language in system preferences/language & text/input sources and then select it from the "flag" menu at the top right of the screen. The font takes care of itself if you are using the right keyboard.