Technically there is average IQ by country site, just google. Not that difficult to get faces by country. Put them together. Of course there are regulations and

Technically there is average IQ by country site, just google. Not that difficult to get faces by country. Put them together. Of course there are regulations and ethic. But in some cases it should work well and is more or less acceptable. Like on Down syndrome or alcohol/drugs abuse. Also age detection should work. So, it can be used within legal and acceptable range.