The example "tutorial" included in QtIFW contains a translation file "de_de.ts" to illustrate how to translate the installer, nevertheless it's just a placeholder and it doesn't change the generated installer. It would be more useful if it really showed how to translate or customize the installer GUI.
And the documentation is lacking, it doesn't specify what are the contexts needed for the translations files.
"The context being used for translation is the basename of the script file when using qsTr or the class name of the UI file when translating a user interface."
For example, what is the context need to translate the description of a component in the component selection page? Or the "Select components" text in the same page?
I tried with ComponentSelectionPage (and variations like QInstaller::ComponentSelectionPage) but none of them did work.
This problem could be solved with a more detailed documentation.