Cornish is not yet dead. My great-grandmother (d 1950ish) spoke fluent Cornish, and my grandmother retains some sayings, though not much more than that. There is a large Cornish community in South Australia, and indeed Australia as a whole, descended from Cornish miners who came to Australia in the 1800's.

There are also numerous language preservation projects being established in Australia to save the languages of the original inhabitants of our country, the Aboriginal people, of who well over 100 languages and dialects exist(ed).