To Optimize, or Not to Optimize, That Is the Question: TelU-KU Models for WMT21 Large-Scale Multilingual Machine Translation. - Sari Dewi Budiwati; Tirana Fatyanosa; Mahendra Data; Dedy Rahman Wijaya; Patrick Adolf Telnoni; Arie Ardiyanti Suryani; Agus Pratondo; Masayoshi Aritsugi (WMT@EMNLP, 2021)