Frontmatter -- Contents -- List of illustrations -- Chapter 1. The Multilingual Learner and Speaker -- Chapter 2. Factors Affecting Non-native Language Influence -- Chapter 3. What Can be Transferred from One or More Non-native Language to Another -- Chapter 4. Multilingual Speech Production -- Chapter 5. The Multilingual Lexicon -- Chapter 6. Prior Language Knowledge, Cognitive Development and the Language Acquisition Process -- Chapter 7. Conclusion -- References