Coordinate bilingualism; Compound bilingualism; Dominanz (biling.) ; Dominance (biling.) ; Continuum (biling.) ; Cross-linguistic influence (psycholing.) ; Language loss (biling.) ; Attrition (biling.) ; Language attrition (biling.) ; Auswanderer; Emigrants; Migrant; Aussiedler; Gastarbeiter; Arbeitsmigranten; Immigrants/Emigrants ; Minoritätensprache; Minority language ; Critical period (second language acquisition) ; Alter (Einfluss auf Zweitspracherwerb) ; Age (influence on second language acquisition) ; Ultimate attainment (second language acquisition) ; Near-native competence (second language acquisition) ; AoA; Age of acquisition (second language acquisition) ; Sensitive period (second language acquisition) ; Speech perception (second language acquisition) ; Sprachperzeption (Zweitspracherwerb) ; Speech production/speech perception (second language acquisition) ; Second language acquisition in children; Kindlicher Zweitspracherwerb; Child second language acquisition ; Categorical sound perception ; Geräusch (Sprachverständnis) ; Noise (language comprehension) ; Swedish ; Latin America (Spanish language in) ; Lateinamerika (span. Sprache in) ; Spanish in Latin America ; Korean