A better example might involve a common English word with a wierd, non-phonetic spelling. A word that you might imagine it forgivable for even someone who recieved an English PhD to misspell. After all Chinese is a seperate language from English and it is neccessary for it to be evaluated in its own context.
If you think this definetly couldn't happen in English, take a look again at this post -- for it contains eight outright, unambiguous, misspellings of common English words that I would not be surprised if even an English PhD from Harvard made on occassion, especially if your choice of three students were unlucky and they were having embarassingly bad days. (After all, English PhDs isn't the study of spelling, it's the study of literature).