The Foreign Language Known Words Test
This application will test your knowledge of a random sample of words (or characters) in a foreign language, both common and rare, for the purpose of estimating the number of words you know. At the end of the test, the program will report the number of words it thinks you know. It may also record the results of your test, for use in a project on word knowledge.
After a set of optional introductory questions, you will be presented a series of approximately 200 words, one at a time. For each word, you will first be shown the word in the target language. You will make your own judgment as to whether you "know" the word. The criteria you use will be up to you. For example, you may only rate a word as known if you know the correct pronunciation. Or, you may choose to be more lenient with the pronunciation or more strict with the English meanings. Being consistent in your ratings will improve the accuracy of your results.
After thinking of the meaning of the word, click the button to show the answer. The correct definitions as currently defined in a reference dictionary dictionary will then appear. Judge, based on your original guess, whether you knew the word. Then click the appropriate "Unknown" or "Known" button. There are also keyboard shortcuts for the buttons, which can help speed up the testing process.
After the words have been shown, you will be shown an estimate of the number of words you knew. In addition, you be shown a graph of how your word knowledge performs for different word frequency levels. You will be given a PIN so that you can access these same results again later.
Chinese Simplified Words
Word list and frequency from Lancaster Corpus of Mandarin Chinese (filter out names >1 character, texts D and H, ordinals >1 character); English and pinyin from CC-CEDICT version 2011-03-13
Chinese Simplified Characters
Test of individual simplified characters with pinyin and definitions. Word frequency data is from Jun Da Modern Chinese Character Frequency [http://lingua.mtsu.edu/chinese-computing/statistics/]; readings and definitions are from Unihan 8/23/2012 [http://www.unicode.org/Public/6.2.0/ucd/Unihan.zip]
Vietnamese Words
Word list and frequency from Wortschatz Liepzig 2014 Mixed 30K sentences (https://wortschatz.uni-leipzig.de/en/download/Vietnamese); English from VNEDICT version 15 February 2019 (http://www.denisowski.org/Vietnamese/vnedict_readme.htm)