How to pronounce things

[Wallace Chafe]

Willem and Bob make me feel a little better about my memory. Maybe I 
assimilated the uncensored version before it was cleaned up. But now how 
about the final syllable? My preference is for -shah, but is -shaw a 
regional variant, as also in Atakapa, and in pa 'dad' pronounced as paw? 
And how about Arkansas?
Wally

> I strongly suspect they both are/were and that the affricate
> pronunciation is a spelling pronunciation attributable to taboo
> avoidance.  Who wants to stand in front of a class of late teens and say
> "shitty" right out loud?  It would sort of make it an "unteachable
> moment."
> Bob