There is one part of the review of this book that caught my attention:
But why perfectly common words should be taboo — unutterable in certain social contexts — is another mystery, and the forbidden words differ widely across languages. In Djirbal, an Australian aborigine language, every word is taboo when spoken in the presence of mothers-in-law and certain cousins. A special vocabulary is needed for these relatives.
I think you don't have to go as far as Australian aborigines to find examples of this in our daily communication. For instance, when I lived in the USA, I remember that the "polite" thing when children were present was to swear (if you "had" to) using equivalents. For example, say "the F word", instead of F**** (oops, I just censored myself ).
Anyways, the book sounds really interesting.
Thanks for sharing,