Cato the Censor is commonly accepted as both the founder of Latin prose and as an outspoken critic of everything Greek. The relationship between these two roles is one that deserves more investigation than it has received, especially in the area of his actual linguistic usage as opposed to his (largely reconstructed) ideology: recent studies have been longer on the latter than on his Latin words and syntax and the way they may have been influenced by the Greek language. Such studies as there are of Greek influence on Catos surviving Latin are few and old, and none are in English. This century’s significant advances in our knowledge of the interaction between Latin and Greek, as well as new editions of Cato, will be taken into account in this proposed study through a reassessment of Catos Latin with respect to his use of Greek-based vocabulary (whether introduced into Latin by him or not) as well as on the possible influence of Greek phonology, morphology and syntax. Conversely, evidence of Catos avoidance of Greek (or shared) elements already in use in Latin will also be examined.