VIM mass delete words based on spell

from vim user group

 

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I have a long list of words, on word per line. Many of the words are
not "words", i.e. not in a dictionary.

I would like to turn on vim's spell check and delete only the words
vim knows. Then I will go thru the remaining words and add them, or
not, to my vim word list.

Is that possible?

 

:%s//w/+//=printf("%s", empty(spellbadword(submatch(0))[0])?submatch(0):'')/

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