It would a really good test if they could make a predictive model that, based on brain scans, classifies subjects as German or Arabic native speakers. If that

It would a really good test if they could make a predictive model that, based on brain scans, classifies subjects as German or Arabic native speakers. If that had good classification results, we could be very confident that it's a real difference. Disclaimer: not a neuroscientist, maybe it's convincing for neuroscientists already as is.