I had never heard of quinoa (and couldn't pronounce it) until just two and a half years ago. My dog came down with a rare disease and I had to go to a special web site to look for recipes I could cook for her. This disease is mostly controlled by an ultra low-fat diet (as opposed to medication). The web site suggested several very weird diets - one of them being bananas and
squid - I'm not kidding! And it also recommended things like quinoa and crab meat, which was a little more do-able, but I first had to learn what quinoa was (and how to pronounce it). Ultimately, I've been feeding her potatoes and ground turkey, which is more do-able still, and she's thriving very nicely.
I learned about kale and endive in college when I worked at the dormitory cafeteria. We used it as decoration around the salad bar. No one actually
thought to eat that crap.
I have no idea what sous vide is (or how to pronounce it).
Being from Northern California, as opposed to the part of California that's closer to Mexico, I had never heard of salsa until I went to college (in Southern California). Now I wonder how I could have possibly lived to be 18 years old without knowing what salsa is.