Kindersprache (pathol.) ; Child language (pathol.) ; Specific language impairment; SLI; Dysgrammatismus (Kindersprache) ; Dysgrammatism (child language) ; Handicapped language acquisition ; Wortbedeutung (Spracherwerb) ; Bedeutungsentwicklung; Semantic development ; Kindersprache (Sprachverständnis) ; Children's comprehension of language; Language comprehension in children ; Zweitspracherwerb (lex.) ; Second language acquisition (lex.) ; Vocabulary (second language acquisition) ; English