Enjoyable quiz. In addition to the Australian question, you could also ask which major Malawian city takes it's name from a town in Scotland? Or which major Zambian city takes its name from a famous Scottish explorer (born in the above town)?
'Scots' is far too broad an answer for the last question, there are various types of Scots. I tried 'Lowland Scots' which you didn't accept (called 'lallands,' or 'lallans'). 'Scots' is an adjective that means much more than a dialect. Misleading.
I personally have never heard anyone call it any other term