Hi,
The "Display Language selection" dialog is not available when installing from a .msi file, because that dialog is displayed by the bootstrapper.
You can use the "Translations" page to generate .msi packages for the languages you need.
Checking the box for "Additionally create compounded multilingual package" a msi package containing the languages you selected will be created in the "\all" subfolder of the folder where where the project is built.
The language will be selected automatically according to the regional settings on the target computer.
You can read more here:
http://www.advancedinstaller.com/user-g ... uages.html
Regards,
cosmin