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Multilingual User Interface

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For other localizations, not only Windows-specified, see Internationalization and localization
MUI Vista

Windows Vista Ultimate Start Menu before Traditional Chinese MUI was applied (left) and after Traditional Chinese MUI was applied (right)

Multilingual User Interface (MUI) is the name of a Microsoft technology for Microsoft Windows, Microsoft Office and other applications that allows for the installation of multiple interface languages on a single system. On a system with MUI, each user would be able to select his or her own preferred display language. MUI technology was introduced with Windows 2000. The MUI technology is covered by an international patent titled "MULTILINGUAL USER INTERFACE FOR AN OPERATING SYSTEM" (US Patent number: 6252589). The inventors are Bjorn C. Rettig, Edward S. Miller, Gregory Wilson, and Shan Xu.

Functionally, MUI packs for a certain product perform the same task as localized versions of those product, but with some key technical differences. While both localized versions of software and MUI versions display menus and dialogs in the targeted language, only localized versions have translated file and folder names. A localized version of Windows translates the base operating system, as well as all included programs, including file and folder names, objects names, strings in registry, and any other internal strings used by Windows into a particular language. Localized versions of Windows support upgrading from a previous localized version and user interface resources are completely localized, which is not the case for MUI versions of a product. MUI versions of a product do not contain translated administrative functions such as registry entries and items in Microsoft Management Console. The advantage of using MUIs over localized versions is each user on a computer could use a different language MUI without requiring different versions of software installed and dealing with the conflicts that could arise as a result. For example, using MUI technology, any version of Windows can host Windows applications in any other language.

MUI products are available only through volume agreements from Microsoft. They are not available through retail channels. However, some OEMs distribute the product. Check %windir%\Mui for muisetup.exe and run the program to see available languages (%windir% is the "Windows" folder, usually on the c:\ drive).

MUI in Microsoft Windows Vista

Up to Windows XP, MUI packs for a product are applied on top of an English version to provide a localized user experience. Windows Vista further advances MUI technology with support for single, language-neutral, language-independent binary files supporting multiple language skins, with the language-specific resources contained in separate binaries. The MUI architecture separates the language resources for the user interface from the binary code of the operating system. This separation makes it possible to change languages completely without changing the core binaries of Windows Vista, or to have multiple languages installed on the same computer with the same core binaries being used. Languages are applied as language packs containing the resources required to localize part of or the entire user interface in Windows Vista.

MUI packs are available to Windows Vista Enterprise users and as an Ultimate Extra to Windows Vista Ultimate users.

Beginning with Windows Vista, the set of associated MUI APIs are also made available to developers for application development.

See also

External links

de:Multilingual User Interface

es:Interfaz de Usuario Multilingüe ko:다중 언어 사용자 인터페이스uk:Multilingual User Interface

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