Girls in Borough Park schools, including most of the Hasidic schools, speak mostly English to one another, even outside the confines of their secular classes. At home, most Hasidic girls speak English with their mothers and sisters, Yiddish with their brothers, and alternate languages with their fathers (perhaps limiting themselves to Yiddish on holy days such as Shabbos, but resorting to English when discussing secular matters that are more easily expressed in the vernacular). By contrast, Satmar girls in Williamsburg and KJ talk mostly Yiddish with their classmates.
