I back you up. Non-native english speaker here. My result: I know 10,600 words. I really doubt it, I have an english dictionary that contains about 4,000 words

I back you up. Non-native english speaker here. My result: I know 10,600 words. I really doubt it, I have an english dictionary that contains about 4,000 words and I don't think I need another dictionary. Plus my computing terminologies, 10K words is still way beyond me