English as a second language; ESL; TESOL ; Erzählen (kommunikative Funktion) ; Story telling (communicative function) ; Narratives (pragm.) ; Story telling (pragm.) ; Manager (language behavior) ; Führungskraft (Sprachverhalten) ; Rollenkonflikt (Kommunikationsforschung) ; Positioning theory; Role-specific communication ; Self-disclosure; Self-presentation (communication research) ; Case study (second language acquisition) ; Neuseeland (engl. Sprache in) ; New Zealand (English language in) ; Pākehā; English in New Zealand ; Tongan