If there's somebody at your apartment complex (not sure exactly how many residents) from a country you're interested in and you (more below)?

know their name and which apartment they live in, and want to say hi because you're interested in their country of origin, how would you go about it ? And would it be ok if you only know a little bit of their language (they probably speak English but honestly I'm not sure how much) ..
Update: Thanks Douglas! Sounds like a reasonable, friendly, and relatively inexpensive way of going about it. I'm in college but probably not going "home" for the holidays and that's probably their situation as well.
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