Composition (teaching of) ; English as a second language; ESL; TESOL ; Academic language; Scientific language ; Jugendliche (Sprachverhalten) ; Adolescents (language behavior) ; Jargon; Youth language ; Multilingualism; Polylingualism; Plurilingualism ; Hochsprache; Schriftsprache; Acrolect; Standard language ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Evaluation criterion (text.) ; Sachtext; Scientific article; Sachbuch; Nonfiction; Technical discourse ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English