Multilingual app toolkit 4.0 Editor

Install alongside Visual Studio to streamline your localization workflow during app development.

This download contains the standalone Multilingual App Toolkit 4.0 Editor tool (also known as the Multilingual Editor), in the form of an .msi installer. If you use Visual Studio 2017 or later, you should also download and install the Multilingual App Toolkit 4.0 Extension in addition to the Multilingual Editor.

Note: This .msi installer also includes the Multilingual App Toolkit 4.0 extension for Visual Studio 2015.


The Multilingual App Toolkit includes an extension for Visual Studio that helps create simpler translation workflows by focusing on the following areas:

  • Integration with Visual Studio IDE. Add and manage translation files within a project solution using standard Visual Studio menus and dialogs.
  • Pseudo language integration. Test localized apps 'in-house' by identifying localization issues during development. These issues can include hard-coded, concatenated, or truncated strings, and visual issues that arise when working with different languages. Pseudo translations are stored in the localization industry standard XLIFF file format, and you can edit them just like any other language translation. This gives you granular control over pseudo translation testing.
  • Microsoft Language Portal integration. Get terminology and UI translations from actual Microsoft products through the Microsoft Terminology Service API (requires an active Internet connection).
  • Machine Translator integration. Get suggestions via integrated Microsoft Translator services (requires an active Internet connection). Integration with Microsoft Translator services gives you instant visualization and testing across multiple languages without the assistance of a human translator.
  • Translation file export and import roundtrip. Send and receive resources with individuals or a translator service via XLIFF files.
  • Dedicated localization editor. Use to easily edit translated strings. Get translations and suggestions quickly via the integrated Microsoft Language Portal and the Microsoft Translator services (requires an active Internet connection). You can also quickly edit data stored in XLIFF files by adjusting pseudo and actual translations.

Installation requirements

  • Supported operating systems. Windows 10 (x86 and x64)
  • Required software.Visual Studio 2015 or later
  • Disk space requirements. 0 MB (x86 and x64)


Important Make sure you have the latest service pack and critical updates for the versions of Windows and Visual Studio that you are running. To find recent security updates, use Windows Update.

Click on one of the language-specific links above to start the download package. Then do one of the following:

  • To start the installation immediately, click Run.
  • To save the download to your computer for installation at a later time, click Save.

Additional info

You must have an active Internet connection to use the Microsoft Language Portal and Microsoft Translator services.