[2] [3] Today some speakers have a "heavier" more guttural way of speaking, e.g. rolling the tongue when pronouncing the "rr's", starting words with Ng rather than a single N and also heavier speakers sound out a "dj" sound rather than "ch" or "t".
"Heavier" speakers tend to be the more western groups from along the Burnett River of Queensland.
The more coastal families today seem to have a "lighter" way of speaking (less guttural & not rolling the tongue and using the single N at the start of words rather than the Ng & using "ch" & "t" rather than "dj" etc.)
which is most likely the result of the influence of the English language in recent times.
The project aims to "identify and document critically-endangered languages — those languages for which little or no documentation exists, where no recordings have previously been made, but where there are living speakers".