Until the 1980s, the use of Taiwanese, along with all varieties other than Mandarin, was discouraged by the Kuomintang through measures such as banning its use in schools and limiting the amount of Taiwanese broadcast on electronic media. These measures were removed by the 1990s, and Taiwanese became an emblem of localization. Mandarin remains the predominant language of education, although there is a "mother tongue" language requirement in Taiwanese schools which can be satisfied with student's choice of mother tongue: Taiwanese, Hakka, or aboriginal languages.