2022-07-24 I found and used this book as a companion while reading Human Action. It was wonderful! The subtitle tells you what it covers. But it is important, since Mises uses precise language that is not often commonly known.
The book includes translations of foreign phrases (or longer) that his scholarship required, but the average reader may well not know. Many fascinating items.
The context of the words or phrases are also explained.
The author was a close associate of Mises for many years, who worked with Mises to develop this book for American primarily, but also other English speaking/readers.