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Python is the most important language used in the AI and machine learning field. Python is quick to learn and reduces the time needed for development. R is a popular choice for analyzing, manipulating, and evaluating statistical data. Prolog is a flexible and powerful programming language often used for machine learning and AI. Lisp was the language developed and used by the father of AI, John McCarthy. Java is one of the most popular programming languages widely employed across a large number of fields, but Java is also well-suited to AI.