Abstract
1. Introduction
2. Definition of TLA
3. Distinction between SLA and TLA
4. Current Models of Multilingualism
4.1 The activation/inhibition model (David W. Green)
4.2 Bilingual and multilingual production models (Kees De Bot)
4.3 A Dynamic Model of Multilingualism (DMM)/Dynamic Systems Theory (DST) (Philip Herdina and Ulrike Jessner)
4.4 The factor model (Britta Hufeisen)
4.5 The model of multilinguality/The biotic model of multilinguality(Larissa Aronin & Muiris O Laoire)
4.6 The multilingual processing model (Franz-Josef Meißner)
4.7 The Role-Function Model (Bjorn Hammarberg and Sarah Williams)
5. Conclusion
References