I quickly discovered, right in front of the class at the white board with marker in hand, with my first " { " written, that being fluent in English was NOT the same as being fluent in Spoken Programmer English.
My second realization was that almost nobody in the United Kingdom spoke a dialect of English that I could comprehend, but that's another story.
Bonus info: { } are called commonly called måsvingar/seagull wings in Swedish, which really gave me no hint at all what to call them in English.