Multilingualism; Polylingualism; Plurilingualism ; Transfer (languages in contact) ; Adstratum language; Adstratsprache; Interference ; Tone languages ; Third language acquisition ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Interference (pros.) ; Intonation (word) ; Wortbetonung; Oxytonon; Paroxytonon; Proparoxytonon; Wortakzent; Word intonation ; Pitch (phonem.) ; Singapur (engl. Sprache in) ; Singapore (English language in) ; Singlish; English in Singapore ; Bahasa Malaysia; Melayu; Melaju; Betawi; Malay ; Basar-Malaiisch; Bazaar Malay; Chinese Malay; Kupang Malay; Baba Malay ; Mandarin; Kantonesisch; Cantonese; Putonghua; Sinitic; Hakka; Yue; Chinese
