How can you tell if one group in a crowd of hundreds is from your home country? I was at a ski resort in Tahoe earlier today, taking a burger-and-chili-fries break, studying a Japanese family sitting at a table in front of me. They were far enough away that I couldn't hear what they were saying, but two tiny signs told me that they were Japanese, not Chinese or Korean.
Anyone who's been asked if they can tell the difference between the three dominant East Asian races has probably taken—or should take—the All Look Same quiz. It's really hard. I always score pretty badly on it. But that's because the biggest indicators of Japanese, Korean, or Chinese are not the facial features, but much more nuanced things like the way their jeans are tapered, or the way they ask for the bill at a restaurant.
Back to the family at the ski resort. It was a mom, a baby, a dad, and another younger woman, presumably an aunt. The dad was talking to the aunt while buckling his ski boots. At one point, he looked up from his boot-buckling and did a slight shake-of-the-head-nod type of thing. That gesture, albeit so small and subtle, was so Japanese! And then I looked over at the mom and the baby. The mom was holding the baby up to her face and talking to him. At one point, she did this thing where she gave the baby a little boost and made a facial expression that was so distinctly Japanese.
In this particular situation, I had very little else to go by. They were all wearing ski gear, which made clothing analysis obsolete, and I was too far away to tell what or how they were speaking. But I knew, because of these two little things.
If you have any stories about how you've been able to tell whether someone is from your home country/culture, please share!