Read original post by Ian Hamilton at Building Windows 8 Blog
Since its introduction in Windows 2000, Multilingual User Interface technology, or MUI, has allowed customers to install additional display languages on their Windows PCs and to switch between them. But for the majority of users, the language you got when you booted up your Windows PC for the first time was likely the one you were stuck with. For Windows 8, we have reimagined the display language experience, focusing on making additional display languages available to all Windows users, making them super easy to find and install, and allowing users to switch between them. This blog entry unveils the changes we’ve been making in Windows to achieve this.