In 1958, Jan Parandowski organized an International Translators Convention in Warsaw, and in 1962 he became the vice-president of International PEN. In 1964 he received the Polish State Award of the First Degree, and in the same year he was a signatory to the "List of 34" scholars and writers in defense of freedom of speech. In 1975 he was honored for his lifetime achievement by Radio Free Europe. In 1976 he received an honorary doctorate in Christian Philosophy from the Catholic University of Lublin (KUL).