secret language
隠語
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暗語
、
符牒
Cryptography
, the practice and study of hidden information
Language game
, a system of manipulating spoken words to render them incomprehensible to the untrained ear
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/suto3/google.icon
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/suto3/Google画像検索.icon
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/suto3/Google定義検索.icon
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/suto3/wikipedia.icon
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/suto3/weblio.icon
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/suto3/kotobank.icon
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/suto3/jisho.icon
secret language