The Vauquois Triangle is a conceptual model and a diagram describing possible approaches to the design of machine translation systems.
This is my SVG rendering of the extended version of Vauquois' triangle (1985), based on a rendering of it published by Prof. Christian Boitet in this scholarly article: https://www.cairn.info/revue-francaise-de-linguistique-appliquee-2007-1-page-25.htm 
The author of this conceptualisation of machine translation approaches is the late machine translation pioneer Bernard Vauquois. The concept was first described by Vauquois in 1968. There are numerous versions of the Vauquois triangle on the Internet, but this is the most complete one I have seen. 

Prof. Boitet was Vauquois' student, and I his.
The originator of the concept is the late Bernard Vauquois, first publishing it in 1968 (VAUQUOIS, Bernard. A survey of formal grammars and algorithms for recognition and transformation in mechanical translation. In : Ifip congress (2). 1968. p. 1114-1122.) 

The author of this painstaking SVG reproduction of it is I.