Discussion on answer by Daniel R. Collins: What if a student doesn't understand a question because of differences in dialect?

@ZeroTheHero Depends on the place. UCL's rule is at 7.2 in ucl.ac.uk/academic-manual/chapters/…. Oxford's at ox.ac.uk/students/academic/exams/completing-an-exam/… is similar (see "Paper errors"). I think the intention is to avoid issues about invigilators whispering different things to different students, or the fairness of re-writing a question on the fly when some students will have already answered it.

@Tom I'm Canadian and thought a fortnight was 2 days. Maybe 4. It did not matter because I never needed to really know since no one uses it. I've only seen it in poems so for a long time I thought it referred to some romantic but vague notion of time because that's how I saw it used. In speech, it was only ever mentioned by a high school teacher who mused whether anyone knew what a fortnight was and we weren't told even then. Do you know what a toque is?