Language testing ; Needs assessment (language teaching) ; English as a second language; ESL; TESOL ; Pragmatische Kompetenz; Pragmatic competence; Communicative competence ; Second language acquisition (pragm.) ; Zweitspracherwerb (pragm.) ; Interactionist hypothesis (second language acquisition) ; Conversational analysis (second language acquisition) ; English ; Mandarin; Kantonesisch; Cantonese; Putonghua; Sinitic; Hakka; Yue; Chinese