What i mean is, if there are 3 persons, 1's Chinese, other's Korean and other's Japanese, can you say who's who?
Same question with those asian writing.
Heres a random small test (according to google lol)
Who's who?



(Can be easy for Asian people and don't blame me if u guess it wrong, i googled jap/kor/chn girl and those pics were show'd... make ur own test if u like)
Well, my opinion is.. they can be differentiated between their eyes lol
And as for the writing, kinda easy: japanese have less lines than chinese and korean have most circles xD
Kind of joking, but is what i think.
























