Ethnopragmatik; Ethnopragmatics; Culture-specific communication ; Dyadic communication ; Family communication ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Sprachentwicklungsverzögerung; Language delay ; Baby talk; Motherese; Child-directed speech; Ammensprache; Babysprache; Infant-directed speech; Fatherese; Language spoken to children ; Canada (English language in) ; Kanada (engl. Sprache in) ; English in Canada ; Italian