Yiddish language
From 1905 many local Yiddish-language organization were loosely coordinated by a group called the Jewish Socialist Agitation Bureau, founded by a tailor from Rochester, New York named Max Kaufman. Kaufman's Agitation Bureau was envisioned as a mechanism for bringing prominent Yiddish-language socialists from New York City to address Jewish communities in Rochester, Buffalo, Syracuse, and elsewhere in the Northeast. This effort proved successful, with such socialist notables as economist Isaac Hourwich and politician Meyer London sponsored on speaking tours. The Bureau also coordinated the distribution of leaflets and pamphlets in the Yiddish language.