proscribe French, their mother tongue, and they will hate you and have nothing to do with your schools.
early 15c., "write before, prefix," from Latin proscribere "publish in writing" (literally "write in front of"), including senses of "publish as having forfeited one's property, condemn, outlaw before the world," from pro- "before" (see pro-) + scribere "to write" (see script (n.)). Meaning "prohibit as wrong or dangerous" first recorded 1620s.