Managed to bypass language selection with CurrentLocale=en_US but connecting reader via usb still prompts 'Computer detected' instead automounting, depsite having AutoUsbGadget=true.
Code:
[ApplicationPreferences]
CurrentDemoRegion=
CurrentLocale=en_US
EarliestChangeLog=4.4.9298
HomePageViewVisitCount=6
LongPressDialogShown=true
QuickTourWidgetShown=true
QuickTourWidgetShownCount=8
RefresherDialogShown=true
SideloadedMode=true
firstRunDate=@Variant(\0\0\0\x10\0%\x8e\x86\0N\xf1\x41\x2)
lastPlugTime=@Variant(\0\0\0\x10\0%yx\0<5\xa7\x2)
[DeveloperSettings]
AutoUsbGadget=true
EnableDebugServices=true