Soft option have a setting"language"
Which contains " de/en/es/fr/ja/pt/ru/zhcn/zhhk" or more
Each corresponds to a language
Choosing a language changes the language of the software itself
The language that you set in the Advanced Installer project is related to the UI of the package that will be installed (dialogs and controls). It will not have any impact on the application that is contained by the package (the user's application).