10. A computer program product for imbuing an artificial intelligence system with idiomatic traits, the computer program product comprising a tangible computer readable storage medium having program code embodied therewith, wherein the program code is readable and executable by a processor to perform a method comprising: collecting electronic units of speech from an electronic stream of speech, wherein the electronic stream of speech is generated by a first entity; identifying tokens from the electronic stream of speech, wherein each token identifies a particular electronic unit of speech from the electronic stream of speech, and wherein identification of the tokens is semantic-free such that the tokens are identified independently of a semantic meaning of a respective electronic unit of speech; populating nodes in a first speech graph with the tokens; identifying a first shape of the first speech graph; matching the first shape to a second shape, wherein the second shape is of a second speech graph from a second entity in a known category; assigning the first entity to the known category in response to the first shape matching the second shape; and modifying synthetic speech generated by an artificial intelligence system based on the first entity being assigned to the known category, wherein said modifying imbues the artificial intelligence system with idiomatic traits of persons in the known category.
10. A computer program product for imbuing an artificial intelligence system with idiomatic traits, the computer program product comprising a tangible computer readable storage medium having program code embodied therewith, wherein the program code is readable and executable by a processor to perform a method comprising: collecting electronic units of speech from an electronic stream of speech, wherein the electronic stream of speech is generated by a first entity; identifying tokens from the electronic stream of speech, wherein each token identifies a particular electronic unit of speech from the electronic stream of speech, and wherein identification of the tokens is semantic-free such that the tokens are identified independently of a semantic meaning of a respective electronic unit of speech; populating nodes in a first speech graph with the tokens; identifying a first shape of the first speech graph; matching the first shape to a second shape, wherein the second shape is of a second speech graph from a second entity in a known category; assigning the first entity to the known category in response to the first shape matching the second shape; and modifying synthetic speech generated by an artificial intelligence system based on the first entity being assigned to the known category, wherein said modifying imbues the artificial intelligence system with idiomatic traits of persons in the known category. 18. The computer program product of claim 10 , wherein the known category is for a group having a common level of education.