Multilingual App Toolkit 4.0 Editor

Use the standalone Multilingual App Toolkit 4.0 Editor with Visual Studio to streamline your localization workflow during app development.

Each of the following downloads contain an .msi installer for the Multilingual App Toolkit 4.0 Editor (also known as the Multilingual Editor).

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


If using Visual Studio 2017 or later, you should also download and install the Multilingual App Toolkit 4.0 Extension.

If using Visual Studio 2015 or Visual Studio 2013, the .msi installers listed here include the Multilingual App Toolkit 4.0 extension.


The Multilingual App Toolkit 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


Ensure you have the latest service pack and critical updates for your installed versions of Windows and Visual Studio.

  • Supported operating systems: Windows 10 or later (x86 and x64)
  • Required software: Visual Studio 2013 or later
  • Disk space requirements: 0 MB (x86 and x64)

Additional info

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