Most Taiwanese (86%) speak Hokkien, but Mandarin was the sole official language until fairly recently, so it's spoken by even more (96.8%) people, and consequen

Most Taiwanese (86%) speak Hokkien, but Mandarin was the sole official language until fairly recently, so it's spoken by even more (96.8%) people, and consequently about two thirds of the population primarily use Mandarin. Young people and inhabitants of Taipei use Mandarin even more often. (All according to the preliminary results of the 2020 census: https://www.stat.gov.tw/public/Data/110816389USMXRNUA.pdf https://www.stat.gov.tw/public/Data/110816389USMXRNUA.pdf )