This is the kind of article that evolving culture tends to produce. A sad, lonely tale of a woman who had nobody to speak to in her native tongue.
Sometimes there really isn’t anything to be done.
My initial reaction is that someone with more skills than the linguist with whom the indigenous woman was familiar should have attempted to record as much of the language as possible. If not directly working with Bo (the name of the woman and her tribe) to learn the language, then at least video and audio that could be examined in the future. Perhaps they did, the article isn’t specific on that point.
In the end, I just saw a woman and her improbable friend, spending their last moments together unburdened by any other bullshit than two people connecting personally.
How can that be the wrong way to see things through?