State of the art ; Applied linguistics ; Language testing ; Glottodidaktik; Lehrforschung; Pädagogische Linguistik; Pedagogical linguistics; Language teaching research ; Einfluss von Sprachen aufeinander; Sprachberührung; Areallinguistik; Languages in contact ; Zweitspracherwerb (Textproduktion) ; Second language acquisition (text production) ; Text production (second language acquisition) ; Second language acquisition (psycholing.) ; Processability theory; Language comprehension (second language acquisition)