I’m a 19-year-old student from Malaysia. I’ve been introduced to the language at a very young age and I’m capable of conducting any type of conversation. However, some of my English-speaking friends on the internet didn’t take too long to figure I’m not a native speaker. Why is that?

(Why I darest say, they darest not get offended when they so indeed have examples that violate their own use and nomenclature!) IE: pudding as a specific dessert, puddings as a general term for desserts. Calling something a Yorkshire pudding that is not a pudding and not a dessert.