WiX 3.6: A Developer's Guide to Windows Installer XML

Localizing the UI

As you've seen, you can use localization files and variables to handle most of the text in your installer, whether that be labels on controls, the names of directories, or the titles and descriptions of your features. So what's left? In the next few sections we'll expand our scope to include the error messages that are baked into Windows Installer, the status messages that are shown over a progress bar, the end-user license agreement, and the size of user interface controls.

Error messages

Windows Installer responds to certain errors by displaying a message box with text about what went wrong. You can see a list of these errors at:

http://msdn.microsoft.com/en-us/library/aa372835(VS.85).aspx

Unfortunately, they're always in English. ...