From the latest New Scientist* magazine (Mar 5-11, 2016) is a letter from Rob Gerrand in Australia, as follows:
Alan Larman (Letters, 30 Jan) asks who said "Teach me a man's language and I shall know how he thinks". A version of the idea might have been expressed by Wilhelm von Humboldt in the 19th century, but it reminds me of Jack Vance's 1958 novel The Languages of Pao.
This tells of an experiment to devise customised languages to create warrior, technical and mercantile classes. Mastermind Lord Palafox says: “We must alter the mental framework of the Paonese people, which is most easily achieved by altering the language.” Later, his son says to a class of linguists, “every language impresses a certain world-view upon the mind.”
* An excellent publication