Language and society ; Critical period (language acquisition) ; Alter (Einfluss auf Spracherwerb) ; Age (influence on language acquisition) ; Age of acquisition; AoA; Sensitive period (language acquisition) ; Coordinate bilingualism; Compound bilingualism; Dominanz (biling.) ; Dominance (biling.) ; Continuum (biling.) ; Sprachattitüde; Linguizismus; Linguicism; Prestige; Monolinguale Ideologie; Monolingual ideology; Sprachliche Unsicherheit; Linguistic insecurity ; Multilingualism; Polylingualism; Plurilingualism ; Sprachattitüde; Linguizismus; Linguicism; Prestige; Sprachliche Unsicherheit; Linguistic insecurity ; Second language acquisition (psycholing.) ; 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)