You can't tell an Australian by the way they look, but the minute they open their mouths, the guessing is over. But why do we speak the way we do? Comedian John Clarke attempts to find out.You can't tell an Australian by the way they look, but the minute they open their mouths, the guessing is over. But why do we speak the way we do? Comedian John Clarke attempts to find out.You can't tell an Australian by the way they look, but the minute they open their mouths, the guessing is over. But why do we speak the way we do? Comedian John Clarke attempts to find out.