Even though MacKenzie was an acknowledged authority on Kurdish and medieval
Khwarezmian, he contributed significantly to the study of other Iranian languages, such as
Middle Persian,
Sogdian and
Pashto. MacKenzie's contribution to Pashto,
Gorani and Kurdish, just to name a few, is the reason for a "former colleague's" description of "poor MacKenzie" as "the man who knows all the dialects and none of the languages." His
Concise Pahlavi Dictionary (1971) was not only one of his most important works, but remains the authoritative lexicographic reference on the language of the 9th-12th century
Zoroastrian texts. His Khwarezmian dictionary remained unfinished at the time of his death. In his obituary, MacKenzie is noted to have been "a polyglot whose linguistic knowledge was remarkable in both range and depth. Generally recognised as the world's leading authority on modern Kurdish and medieval Khwarezmian, he also made distinguished contributions to the study of many other Iranian languages, including Pashto, Pahlavi and Sogdian, at the same time displaying enviable competence in non-Iranian languages such as Arabic and Chinese." ==See also==