[bi.di.a.lec.tal.ism] n (1958): facility in using two dialects of the same language; also: the teaching of Standard English to pupils who normally use a nonstandard dialect -- bi.di.a.lec.tal adj
BIDIALECTALISM
Meaning of BIDIALECTALISM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012