Only for interest:
Adobe has Spelling Dictionary Packs (see add-ons)
Adobe - Adobe Reader : For Windows
http://supportdownloads.adobe.com/pr...atform=Windows
Unpacking the .msi and the data1.cab file in it. There are the .add and .dic files and the GNU licencs files. Additional there is an affdescription.txt
I think it's based on something public, but maybe it gives some additional information for someone who is interested in the .aff format.