Aren't you cheating a bit with the Hindi and Urdu thing? Pretty much the same language, no? I say this as a Swedish speaker where in theory I could probably speak Norwegian as well with a bit of effort (and depending on the Norwegian dialect).
Does the language of love count?
I studied French for 13 years before I went to university In Montreal. A friend and I decided to take a French course our second year to get an easy A and we signed up to the beginner's class. They were culling the ranks on the first day because of frauds like moi. The teacher asked one student "Comment ca va?" and the rube answered "Bien, merci." He was immediately booted and told he had to move up a level. Astute guy that I was I made sure to answer in English that "Today was sunny" when she asked me an innocuous question in French. She nodded approvingly at my idiocy and I stayed in the class. I only got a A minus, though. I didn't do enough lab time.
A decent number of the students in my beginners Korean class in college had Korean-speaking families, and some could even speak pretty well already. I remember waiting in the hall to take my speaking test, sitting next to a guy chatting on the phone in Korean (we'd just learned how to read hangul and say dates). To be fair, based on convos with a couple of them, they took the class to close gaps in their knowledge. For example, they might speak well enough, but not know certain grammar rules, or have vocabulary they want/need that they never picked up.Still, sitting through the ABCs in a language you're already conversational in seems like torture to me.
It's probably why I skipped so many labs. Reciting stuff that I had learned in grade two while the teacher listened in was hard work.