1 Australia, Canada, England, Iceland - Iceland is different because in England, Canada and Australia they speak English, but in Iceland they speak Icelandic.
2 Brazil, Chile, Mexico, Spain - Brazil is different because they speak Portuguese, while the others speak Spanish.
3 Austria, Germany, Italy, Switzerland - Italy is different because they speak Italian, while the others speak German.
4 China, Egypt, Morocco, Saudi Arabia - China is different because they speak Chinese, while the others speak Arabic.
5 Canada, France, Scotland, Switzerland - France is different because they speak French, while the others speak English.