Installing Multiple Language Versions of Visual Studio
By installing one or more language packages, you can run Visual Studio in other languages on the same computer. You must obtain a separate language package for each language that you want to install.
When you install a language package, resource files for the installed features are automatically installed for each language version.
Visual Studio service packages apply to all installed language versions of Visual Studio. You no longer need to install a service package for each language version of Visual Studio that you've installed.
You can uninstall language packages by using the maintenance mode of Visual Studio setup. Open Control Panel, open Programs and Features, choose your edition of Visual Studio, and then choose Uninstall/Change.