DaF; Deutsch als Zweitsprache; German as a second language; DaZ; German as a foreign language ; Learning theory ; Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness ; Sprachverständnis (Lesen) ; Textrezeption (Zweitspracherwerb) ; Text reception (second language acquisition) ; Reading comprehension ; Einfluss von Sprachen aufeinander; Sprachberührung; Areallinguistik; Languages in contact ; Multilingualism; Polylingualism; Plurilingualism ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Processability theory; Language comprehension (second language acquisition) ; German ; Italian