I am writing an academic text about linguistics. I have managed to obtain examples from endangered languages that are rarely included in research (one in particular has less than 500 speakers according to the UNESCO Atlas of the World’s Languages in Danger).
I don't want to fully rely on these languages to illustrate the phenomena I describe, but I would like to include some of them as examples for the sake of it, because it's difficult if not impossible to come across them in literature.
How can I introduce them in my text? Is it acceptable to include "unnecessary" examples? Can it be justified in some cases?