Sprecherziehung; Logopedics; Phoniatrie; Elocution; Oral language training ; Case study (language acquisition) ; Deviation (child language) ; Articulation (child language) ; Adoption (language contact) ; Auswanderer; Emigrants; Migrant; Aussiedler; Gastarbeiter; Arbeitsmigranten; Immigrants/Emigrants ; Language intervention; Children (speech therapy with) ; Speech therapy for children ; Frankokanadisch; Franco Canadian; Kanada (fr. Sprache in) ; Canada (French language in) ; French in Canada ; Mandarin; Kantonesisch; Cantonese; Putonghua; Sinitic; Hakka; Yue; Chinese