The story
Pun on Tsai's name in Mandarin 蔡英文 (Cài Yīngwén), which is homophonous to 菜 (cài, “vegetable”) + 英文 (Yīngwén, “English”).
Etymology from Wiktionary, CC BY-SA 4.0.
Vegetable English
Today it means: Nickname for Tsai Ing-wen, Taiwanese politician. Full definition →