I maybe wrong in understanding the documentation, but assuming I run the following with a very recent "emacs -q" :
'("-d" "en_US" "-i" "UTF-8")))
(accept-process-output ispell-process 3)
The accept-process-output function should return a non-nil value, because hunspell has output its banner (confirmed by associating a buffer to the process). However I can't get it to report anything but nil, and this both under Gnu/Linux and W32.
It doesn't work either if I set up a simple process filter.
Can someone enlighten me ?