a strict dialect is like a language of its own
here in italy because every city as a history of think and talk that is all its own
Another film, Gomorra (last year movie) was like that, all strict dialect but at least i could guess what it was they were talking about because it was a mafia movie and you don't need much fantasy for that
and they were almost all "non-actors", just ordinary people, so i didn't like them either