1: Is it better to be a 'jack-of-all-trades' who speaks five languages at an intermediate level, or a master who speaks only two perfectly?
2: If a country has multiple official languages, does it make the society more open-minded or more divided?
3: With the rapid improvement of AI translation tools, will the motivation to learn a second language become stronger or weaker in the future?
4: Why might learning a second language as an adult actually lead to a more rational and less emotional approach to problem-solving?
5: What physical changes can be seen in a bilingual brain compared to a monolingual one under brain imaging?