Technical language (teaching of) ; Français fonctionnel; Teaching of technical language ; DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Technical language ; Academic discourse; Scientific communication ; Argumentation (action type) ; Ethnopragmatik; Ethnopragmatics; Culture-specific communication ; Modal verb ; Sachtext; Scientific article; Sachbuch; Nonfiction; Technical discourse ; German