Chinese, Japanese, and Korean.
The characters of these languages are all partly based on [[Computer Dictionary/Han characters|Han characters]] (i.e., "hanzi" or "kanji"), which require 16-bit character encodings. CJK character encodings should consist minimally of Han characters plus language-specific phonetic scripts such as pinyin, bopomofo, hiragana, hangul, etc.
Discussion about "Computer Dictionary/CJK":
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