- Traditional Chinese Character(HanT):
台二十一線
- Simplified Chinese Character(HanS):
台二十一线
- Bopomofo(Mandarin Phonetic Symbols): ㄊㄞˊ ㄦˋ ㄕˊ ㄧ ㄒㄧㄢˋ (ㄊㄦㄕㄧㄒ)
- Bopomofo(Zhuyin Keyboard Input/IME): "w96-4g6u vu04" (w96-4g6uvu04)
- (ASCII) Hanyu Pinyin: "taiershiyixian" "Tai2Er4Shi2Yi1Xian4" "Tai2 Er4 Shi2 Yi1 Xian4" (TESYX)
- (Latin) Hànyǔ Pīnyīn: TáièrShíYīXiàn [ Tái èr Shí Yī Xiàn ]
- (英文翻譯) English Translation: "Taiwan 21st Line"
- (西語翻譯) Traducción Español: "Línea 21 de Taiwán"
- (日文翻譯) 日本語翻訳: "台湾21号線"