Language Interface Packs (LIPs) provide localized resources for commonly used UI elements in Windows and can be considered a kind of localized “skin” which can be applied to a Windows computer. For more information on LIPs, see http://msdn.microsoft.com/en-us/goglobal/ee461121.aspx.
If you try to add a LIP as a package to MDT 2010 to install the LIP as part of a Windows 7 deployment, it won't work. However, you can install the LIP by adding it as an application to your MDT deployment share. You need to use the LPKSETUP command line syntax found at http://technet.microsoft.com/en-us/library/dd799270(WS.10).aspx to do this.
Mitch Tulloch is a seven-time recipient of the Microsoft Most Valuable Professional (MVP) award and widely recognized expert on Windows administration, deployment and virtualization. For more tips by Mitch you can follow him on Twitter or friend him on Facebook.