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Microsoft Multilingual User Interface (MUI) and Visual Studio 

Windows Multilingual User Interface (MUI) Packs allow you to install an English version of Windows, and then install various User Interface Language Packs. User Interface Language Packs provide a localized user interface (UI) for the operating system. For example, you can install a Japanese User Interface Language Pack on top of an English version of Windows and then switch the Windows UI language between Japanese and English. The MUI allows you to have multiple language versions of Windows on a single computer.

Visual Studio can be installed on a version of Windows that has the MUI Pack installed. In addition, on computers with the MUI Pack installed, you can also install multiple language versions of Visual Studio, and then switch the Visual Studio UI language using International Settings, Environment, Options Dialog Box.

Limitations of Multi-Language Installations

Considerations to keep in mind when installing different locale versions of Visual Studio on the same computer include the following:

  • The .NET Framework SDK does not allow more than one language version to be installed on the same computer. If you install another language version on a computer that already has a version of the .NET Framework SDK installed, the existing version is overwritten.

  • You can only switch languages between similar editions. For example, if you have an English Express Edition installed, a German Express Edition installed, and a Professional Edition installed, you can only switch languages for the Express Editions, not the Professional Edition.

Support for Code Pages

Some Visual Studio tools do not display text correctly when the text contains characters that are not in the current code page. Instead, question marks appear or the text is corrupted. The following tools or areas are affected:

  • Sites deployed via FTP.

  • Non-ASCII computer names.

  • Command line tools that run outside of Visual Studio.

  • Setup and Deployment projects.

  • Setup Bootstrapper.

  • Visual Basic Migration Wizard.

  • ActiveX Control Test Container.

  • Create GUID Tool.

  • Error Lookup Tool.

  • ATL/MFC Trace Tool.

  • Spy++.

  • OLE/COM Object Viewer.

  • ISAPI Web Debug Tool.

  • MFC application projects with HTML Help content.

  • Projects with DataSource.

  • Visual SourceSafe / SCCI falls back to English when there is an incompatible code page.

  • Visual SourceSafe does not support Unicode filenames.

To correctly display characters that are not included in the current code page

  1. On the taskbar, click Start, click Control Panel, and then open Regional and Language Options.

  2. Click the Advanced tab.

  3. In the Select a language to match the language version of the non-Unicode programs you want to use drop-down list, select the language you are currently using for Visual Studio.

  4. Click OK.


    You must be an administrator on the computer to perform this procedure.

Changing the Language Used for the UI Text in Visual Studio

When you install multiple language versions of Visual Studio on the same computer, the software is installed to a single location. The default language used by Visual Studio for the UI is the first language you installed. For example, if you installed an English version of Visual Studio and then installed a German version, Visual Studio will display the UI text in English by default.

You can specify which language to display the UI text in from International Settings, Environment, Options Dialog Box.

To change the language used for the UI text in Visual Studio

  1. On the Tools menu, click Options.

  2. In the Options dialog box, expand Environment and then click International Settings.

  3. In the Language drop-down list, select the language you intend to use for the UI text in the development environment.


    In the Language drop-down list, select Same as Windows to have the UI text in the development environment match the language of the operating system.

See Also