JD,
TO the best of my knowledge, you shouldn't have a problem with a "dictionary" in any version. All current versions allow for correction and the addition of new words. In other words, the software can be "trained." Note: this is a 1:1 mapping between spoke word and transcription. If you want more, you'll have to look at Premium and up. If this is all you want, Home should work.
You mentioned "person edition" -- I don't believe that's the current nomenclature. Currently: Home, Premium, Professional.
David