The only real difference I see is whether or not I personally know my way around the language in use. If I don't know much about it (Haskell comes to mind), I h

The only real difference I see is whether or not I personally know my way around the language in use. If I don't know much about it (Haskell comes to mind), I have the candidate explain how to read the code. Doesn't happen often frankly, but I find it quite interesting, also gives me insight into how well I can understand stuff the candidate is explaining. I suppose the only thing that would make me frown is if the candidate was evidently a huge language zealot and wanted to use nothing but their language of choice. But I've never interviewed such a person actually.