Sounds good, but I'm a little confused
This is how I envisage it working for me :
I would first use the Word dictionaries/engine via your Spell Checker UI, which is what it does now - yes? Then I'd like to switch to the hunspell dictionaries/engine via your Spell Checker UI for a second opinion. And when I switch dictionaries/engine I am expecting I'll have to restart Word.
Regarding the 'user dictionaries'. Whilst I think its a cool idea to share them between Word and Hunspell, I don't want to be locked into doing that. Nor do I want to locked into having them in fixed locations. I don't keep my Word 'user dictionaries' in the
default location %appdata%\Microsoft\UProof, they're in a subdirectory of my D:\BabbleOn folder. I don't want to change that.
BR