WiX Toolset

UseUILanguages Attribute (Bal Extension)

When set to "yes", causes WixStdBA/Prereq BA to use the user's control panel language settings. Otherwise, the previous API (which uses locale instead of language) is used to maintain compatiblity with previous versions of WiX. On Vista and newer platforms, this value set to "yes" will search all specified user languages, including fallback languages, in order.
Windows Installer references
BootstrapperApplication, BootstrapperApplicationRef
See Also
Bal Schema