Technical language (teaching of) ; Français fonctionnel; Teaching of technical language ; Second language acquisition (language teaching) ; Zweitspracherwerb (Unterricht) ; Foreign language teaching ; Cross-cultural pragmatics; Pragmatics, cross-cultural; Pragmatik, interkulturelle; Intercultural communication ; Gruppenspezifische Kommunikation; Group communication ; Metakommunikation; Metacommunication; Metadiscourse; Metalanguage (communication research) ; Classroom communication; Instructional communication