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There are at least 3,866 languages that make use of an established writing system. Other informative or qualifying annotations for the script may also be provided. Writing systems of the world today. Unger disputes claims made on behalf of Blissymbols in his 2004 book Ideogram.
Although a few pictographic or ideographic scripts exist today, there is no single way to read them, because there is no one-to-one correspondence between symbol and language. Hieroglyphs were commonly thought to be ideographic before they were translated, and to this day Chinese is often erroneously said to be ideographic.