Another language set to die out?

The San language Nluu is spoken only by 2 sisters and their 95 yr old mother, linguists are working with them to transcript and translate it before it is too late.
It is a language with 112 unique sounds and has been passed on in spoken word through the ages but never written down.
Brilliant quote from guardian article 9/6/15
"N|uu has one of the biggest speech sound inventories in the world, he added, including more than 45 click phonemes, 30 non-click consonants and 37 vowels. “Language is the most important cultural asset, so if you lose your language, you lose your culture. In Canada, there is a clear link between those indigenous people who lose their language and suicide rates. In this globalised world, local identity is essential,” Brezinger"
A second section of the article-

"Koper’s sister Katrina Esau, 82, who has received an award from President Jacob Zuma for her work to preserve San language and culture, added: “Other people have their own languages. Why must my language be allowed to die? It must go on. As long as there are people, the language must go on.”