Microsoft Office 2010 just became available to another approx. 140 million native speakers with the release of the Language Interface Packs for Marathi (70 million native speakers plus about 20 million second language speakers), Konkani (4 million native speakers), and Gujarati (46 million native speakers).
You can install them from here:
A Language Interface Pack allows you to change the user interface in the following Office 2010 applications: Excel, OneNote, InfoPath, Outlook, PowerPoint and Word. The pack includes a spell checker and is available for both 32-bit and 64-bit systems.
And here’s the science bit:
All three languages are already available for Windows 7 and Internet Explorer 9: