Different books have different vocabularies (names, places and so on). It would be nice to be able to create per-project dictionaries for words that are only relevant to specific projects. Particularly useful when dealing with “invented” words in fantasy, sci-fi etc. (As an example of what I’m thinking of, OpenOffice Writer does this by allowing you to create as many dictionaries as you like, then enabling the ones you want to be using at any given time by checking/unchecking check-boxes.)
Thanks, this idea is already on the list for future consideration. The main technical hurdle to overcome is that both the Mac and Windows versions use third-party spell check software from top to bottom. It’s not like Word or OpenOffice, which have their own systems built from scratch and thus have full control over them.