Except he provided an inaccurate translation so it seems to me that the concept is not so well understood... IMHO it is indeed untranslatable in the sense that

Except he provided an inaccurate translation so it seems to me that the concept is not so well understood... IMHO it is indeed untranslatable in the sense that there is no single word in English with the same meaning so that a translation requires a description (illustrated by my quote from Wikipedia that spends a whole paragraph explaining what it means).