There is a written form. It's interesting. When we look at all this, the way that the Inuit language is being put into syllabic form is very interesting, but of course here it has just been a transliteration using the European alphabet.
There is, then, a written form, but of course once it is written down there are many more consonants than vowels, and it's very difficult sometimes to get the correct spelling of what the written form is, because it's not standardized.
There have been attempts at written form. I think a Bible was written a few years ago in one of the aboriginal languages, but it would be the linguists who decided that this is the way you write that aboriginal language.