Attempting to set default language with 'VirtualKeyboarSettings.local' property

[Circuits]

I am attempting to set the default language for the Qt Virtual Keyboard using the VirtualKeyboardSettings.local property, for instance:

InputPanel{
                id: virtualKeyboard
                width: parent.width
                anchors.centerIn: parent
                visible: true
                onActiveChanged: {
                    if(activeFocus){
                        switch(langIndex){
                        case 0:
                            VirtualKeyboardSettings.local = "en_US"
                            break;
                        case 1:
                            VirtualKeyboardSettings.local = ///Here I want Espanol
                            break;
                        case 2:
                            VirtualKeyboardSettings.local = ///Here I want Francais
                            break;
                        case 3:
                            VirtualKeyboardSettings.local = ///Here I want Polish
                            break;
                        }
                    }
                }
            }

In the layouts directory I see that each language is given an abbreviation: ar_AR, bg_BG, cs_CZ etc... however, I am not sure what languages those abbreviations refer too. Is there a document somewhere that can tell me which is which?

I tried printing the list of availableLocales to the console:

console.log(VirtualKeyboardSettings.availableLocales)

but this just prints an empty list. However, the keyboard itself has all the of different locals available for me to switch between so I am not sure how it could be empty. In general, this doesn't seem to be working. Is this not how you use the .local property or is there some switch I need to enable before I can use the .local property that I am not aware of?

[koahnig]

@circuits

Probably those https://doc.qt.io/qt-5/qtvirtualkeyboard-layouts.html#english-american-layout