An ardent proponent of the Yiddish language, her political position on Jewish assimilation satisfied neither traditional Jews nor the Soviet leaders.

One of his more important guests was Avrom Dov-Ber Lebensohn (1794–1878), whose poetry written in Hebrew played a role in the revival of it as a modern language.

In part an argument in support of the Bund's demand for national-cultural autonomy, it advocated the establishment of secular elementary schools for the children of the Jewish working class with the teaching to be in Yiddish.

Between 1921 and 1936, she was rector of KUNMZ (the Communist University of the National Minorities of the West), also located in Moscow, where she ran an advanced seminar on Leninism.

In 2018 Suzanne Sarah Faigan completed an annotated bibliography of 357 items as part of the requirements for her Ph.D. She catalogues the variety of material as translations, memoir, didactic party journalism, theory, poetry, and material for young readers; she characterizes Frumkin's tone in these pieces as ranging from moralistic, humorous, derisive, through to emotive, concluding that the work is always clear and well crafted, with a personal quality that made Frumkin's writing popular.

Frumkin was an exceptionally successful orator, persuading thousands of people to join the Bund, to believe in the value of Yiddish, and to accept the idea of democracy as well as minority rights.

A victim of the purges of 1936–1938, she died in a detention camp in Kazakhstan and, although the Soviet Union "rehabilitated" her in 1956, the Bund omitted mention of her in its three-volume collection of remembrances of activists begun in 1956 and concluded in 1968.

[3] Yet she has been associated with antisemitism by writers as divergent as the far-right figure Frank L. Britton, whose The Hoax of Soviet “Anti-Semitism”: Jews, Zionism, Communism, Israel and the Soviet Union 1918–1991 (Ostara Publications) includes Frumkin's "Address on 'National Minorities' to the Second Congress of the Communist International" (1920), and Dara Horn, whose essay "The Cool Kids: Self-mutilation as a Jewish cultural strategy and the sad history of the Yevsektsiya" appears in Tablet: A New Read on Jewish Life.