Terra Lingua is an international non-profit organisation based in Canada. Terra Lingua aims to ‘sustain the biocultural diversity of life – the world’s invaluable heritage of biological, cultural, and linguistic diversity’. Recently they have published the Index of Linguistic Diversity, with an expected negative outlook for Australian languages.
It seems the links between linguistic, cultural and bio diversity are starting to get more attention. This article by National Geographic interviews some of the Terra Lingua workers about the Index of Linguistic Diversity and explains what the Index seeks to demonstrate.
I highly recommend anyone interested in linguistic and cultural diversity and maintenance check out the Terra Lingua site as it is very comprehensive in its reasoning for maintaining global diversity.