ESP; English for academic purposes; EAP ; English as a second language; ESL; TESOL ; Hermetik; Textverständlichkeit (Fachsprache) ; Readability (technical language) ; Lesbarkeit (Fachsprache) ; Speech intelligibility (technical language) ; Teacher talk; Teacher's language ; Processability theory; Language comprehension (second language acquisition) ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition) ; Technical vocabulary ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English