Australia is located in the southern hemisphere, bordered to the north by the Timor Sea, the Arafura Sea and the Torres Strait, to the east by the Coral Sea and the Tasman Sea, to the south by the Bass Strait and the Indian Ocean, and to the west by the Indian Ocean. It is an entire continent with Canberra as its capital, and all its states use the Australian dollar. Australia has no official language, but Australian English is the national and popular language of the country. Australian English is similar to English in grammar and spelling, with some notable exceptions. Australia has no official religion, but the constitution gives freedom to belong to any religion or religious group, and allows religious groups to be established freely.