The Yiddish Club of the Kaunas Jewish Community is celebrating the 120th birthday of Litvak-American Yiddish philologist, educator and author Yudl Mark (1897-1975). Mark taught at the Vilkomir Jewish Gymnasium and was one of the founders of YIVO. He moved to the United States in 1936, and to Israel in 1970. Among his many great works stands the 12-volume Groyser verterbukh fun der yidisher shprakh (Great Dictionary of the Yiddish Language), which caused dispute with YIVO over the use of non-YIVO orthography.