Bangaa: Rhymes with Fang, Duh.
Viera: Rhymes with The Air, Duh.
Nu Mou: Rhymes with New Cow.

Marche: The say Marsh-ay in the commercial, but I just say Marsh.
Montblanc: It should probably be pronounced to rhyme with 'Won't Ankh', but I just use the O from 'pond' and the blank from 'blank'.
Ivalice: They say EE-vul-eese in the commercial, but I prefer EYE-val-iss. *Shrug*