88% with 1 false positive, but it was 'wargish' which I think should be accepted as a real word.

To be fair, I did also hit yes for words that I could work out the greek/latin roots for.

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I know the intent of this test, but English has a special problem in that there is no real definition of what is and is not an English word. For example, there are a large number of words on this test that come directly from another language and are used as a term of art in a specific field.

See: mora, furuncle, cercal

Then you get transliterations like dacoit.

Are units of currency automatically English: piastre

Another genre is words that may be technically English, but would never be used - see delegable (delegatable would be used)

Then you have several alternate spellings from British English/American English/alternative transliterations.