This is kinda hilarious to me, seeing as about one and a half years ago my whole family went to visit my sister who lives in Sendai with her Japanese husband and kid. We took the opportunity to go to Kyoto and Tokyo as well, and pretty much anywhere I bet we stood out like a sore thumb, seeing as we are super white Swedes and none of us is shorter than 5'8", my brother being the tallest at 6'4". And we're pretty much the nicest tourists ever, especially my mom and dad. Mom in particular was mortified every time she accidentally mixed up any of the polite quick phrases my brother taught her. We probably looked super intimidating with our height, but nothing could be further from the truth.
While I'm on the subject of "languages", while we were there my brother was the interpreter since he's studied Japanese and can make himself understood reasonably well. One night we were out in Tokyo and eating at a restaurant in Odaiba after having spent the day there and he got to talking a bit with the cute Japanese waitress. He's so focused on getting the Japanese right that he doesn't notice that all the while the waitress is super flirtatious with him. We're talking standing in a way to access the her assets, twirling her hair with her fingers, eying him all over, all the international signals of "see me, do me". When we had to ask for quick directions as we were leaving she even damn near pushed herself past one of the other girls to answer my brother herself. My brother had no clue. So of course we waited all of one minute before me and my younger sister (I have two) started teasing him mercilessly about it, as siblings should.