I use install4j for multiple language installation,
We can select the language after jre initial, but I want to customize the language selection bundle with welcome page.
Anything possible?
You cannot change the language on a regular screen since the language must be set before the screen/action system is initialized.
However, the installer has a "Replacement script for language code" property. You can use that to show your own language selection GUI or add your own logic for selecting the installer language.