Phylogenese; Language origin ; Phylogenetic development of cognition; Language and thought (phylogenesis) ; Bimodal language acquisition; Language acquisition (sign language) ; Spracherwerb (Gebärdensprache) ; Sign language (language acquisition) ; Ethology ; Gelächter; Laughter ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Phonemik (Spracherwerb) ; Phonetics (language acquisition) ; Kindersprache (phonet./phonem.) ; Child language (phonet./phonem.) ; Spracherwerb (phonet./phonem.) ; Language acquisition (phonet./phonem.) ; Phonological development ; Lallen (Spracherwerb) ; Baby talk; Motherese; Child-directed speech; Ammensprache; Babysprache; Infant-directed speech; Fatherese; Language spoken to children
