Hi Willy,
I probably get it after looong fight. Did you tried to change the language in the latest version(s)? It probably won't work. It is already a few months since this option is disabled for Android 4.x. I cannot explain what exactly happens on your device, but at least I've found some place where on 4.x, devices, localization was probably incorrectly handled. You will see in next Beta, but on 4.x devices, localization should be selected automatically based on device.