On: Ghent University Vocabulary Test

[xchip]

Non native, 73%. 0 non words.

accurse, glycol, propitiation, tumescence, landlocked, klystron, squab, blithesome, lacertian, dingbat, gradate, adjudge, microsomal, latescence, intercut, aviary, semis, vie, dollarfish

But given that Shakespeare wrote all his books with about 1k5 words this test doesn't proof much :)