New words are constantly coming into our language, and old ones passing into disuse.
I work freelance for a government agency making new words for things which have not previously been adequately described. For example, I’ve just come up with "flishing" which means walking along a street with your laptop open trying to get a wifi signal.
To make room for this valuable addition to the language, the word "whichsoever" will be redundant from the end of the month. Make the most of it till then.