Longitudinal study ; Kindersprache (pathol.) ; Child language (pathol.) ; Specific language impairment; SLI; Dysgrammatismus (Kindersprache) ; Dysgrammatism (child language) ; Handicapped language acquisition ; Triggering (language acquisition) ; Language exposure (language acquisition) ; Input hypothesis; Input (language acquisition) ; Einfluss von Sprachen aufeinander; Sprachberührung; Areallinguistik; Languages in contact ; Multilingualism; Polylingualism; Plurilingualism ; Minoritätensprache; Minority language ; English ; French ; Bulgarian ; Arabic
