Random Indian proposal?

[Janessa]

Okay, so I was on Google+ a while ago and some random guy added me, which I have sometimes so I didn't really think anything of it. The difference though is that this guy private messaged me, which I never had before. I just messaged him back to be polite and was started chatting. He lives in India and is 19. I just kept chatting with him cause he was kinda nice, but he didn't speak English very well so it was kinda hard to understand him.
Anyways, we talked for about a day and then he randomly said "If I proposed, what would you say". I thought I had understood wrong so I was like "what?" and he said he was asking me to marry him. He said that he had a sister living out here and in 3 years he was going to move out here to Canada to live near her and go to school. Of course I said no cause I have never even met him and I am only 15. He said that's okay cause I'll be 18 by the time he comes here and we can go on a date before we get married when he comes to visit. I know how absolutely ridiculous this sounds, and I said no again but I don’t know what to think. I looked it up and apparently they have arranged marriage there but I found nothing that could explain why he would have proposed before we even met. Is that just how it is there? Or is someone seriously trying to prank me. I'm so confused!