sentences:  De Jong is well known for his amazing linguistic ability having had a command of Dutch, French, English, German, Chinese, Japanese, Russian, Danish, Mongolian, Sanskrit, Pāli, and Tibetan, as well as the rather acerbic quality of his reviews.His scholarly publications number more than 800; 700 of these are reviews.He made major contributions to the field of Tibetan studies, including a study of an account of the life of Milaräpa by Tsangnyong Heruka Rüpägyäncän (Gtsang-smyon he-ru-ka rus-pa'i-rgyan-can) (1490), and the editing and translation of all Dunhuang fragments apropos of the Rāmāyaṇa story in Tibetan.