Knows less words than even my addled brain does Rated 2 out of 5 stars

I like the Zuckerberg easter egg that I just verified, haha, very apt.
However, I don't like (in the latest example) 'assumedly' not being in the dictionary, plus I believe I noticed numerous times the algorithm being so poor it cannot deal with plurals of an included dictionary word... WTF is that about? Is it American English or something?