To just address a couple of points raised in this thread. Unless they are not fluent in the language, Swedes don't really sing with an accent. Marquise, you as a child of the 70s reared on ABBA should at least know that much! Well to be completely honest with you Michael Bennett I had no idea that Claudia was changed to Swedish. I also didn't have the benefit of having Rob Marshall at my screening to point these things out to me.

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Now that these things are explained they make a lot more sense. I see how they fit in to the adaptation of the overall piece...and that's fine. I'm not a hard up purist by any means. I'm all for opening up the material and adapting it to the medium it is being made for.
Without adaptation we wouldn't have had the glorious film version of THE SOUND OF MUSIC or even the skillful and innovative ones Fosse gave us with CABARET and Marshall with CHICAGO.
I just hope that Marshall's next film musical (if there is one) doesn't resort to the tactics he utilized for both CHICAGO and NINE. But then again he himself has said he isn't a fan of musicals where the characters sing to one another a la Oklahoma or The Sound of Music because of, as he puts it, their artificiality.
Anyway, with all that aside some of the choices made in adapting NINE to the screen are clearer to me now.
I will be seeing it again in another couple of weeks with "fresh eyes" and a better understanding.
It's not a bad film really, not by a long shot. It's light years ahead of the RENT movie fiasco.
I do hope the film is a resounding success if only to get more musicals green lit and into the theaters.