Language Interface Pack(Add-in software that provides partially localized user interfaces for particular computer programs in languages not supported by localized versions of those programs)
Multilingual User Interface Pack(A set of language-specific resources for multiple supported languages. MUI technology enables users to set the user-interface language according to their preferences, provided the required language resource files are present on the computer. It is designed to enable large corporations to deploy a single version of Windows worldwide, while enabling their local users to select the user-interface language)
