A manner of speaking

Mix together:

1. Being bilingual, where one language is essentially a posh version of the other
2. Many, many hours of listening to Roald Dahl stories
3. Very few English-speaking peers

and what do you get?

A 6-year-old who, when trying to convince me of something, starts with:

- Mummy, you're not obliged to do what I'm about to propose...