Technical language (teaching of) ; Français fonctionnel; Teaching of technical language ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Text production ; Sachtext; Scientific article; Sachbuch; Nonfiction; Technical discourse ; English ; Mandarin; Kantonesisch; Cantonese; Putonghua; Sinitic; Hakka; Yue; Chinese