Trying to get a bit more functionality out of Atom\'s spell checker and right now the false positives are making it less than useful.
How can I add a word to Atom\'s dic
Google brought me here and I guess it will happen to others as well, so:
There is an issue about this open at the spell-check Github project. The last comment says adding words to dictionary will probably be there for Atom 1.11. I don't know what the ETA is for that Atom version, but at the time I write the current stable release is 1.10.2, so I guess (sigh) soon.