The present work is the english rendering of La formation de la Langue Marathe - a well-known work by Jules Bloch. The original French version was the first systematic undertaking to coordinate data on Marathi languages,- tracing its evolution and development through various stages - from sanskrit Prakrit and Apabhramsa. Jules Bloch was expert in Dravidian languages, specially Tamil and had studied Indo-Aryan languages. He was therefore competant to undertake the study of Marathi language and place it in its whole environment. It is not surprising that the results of his studies stand unchallenged even half a century after the publication of his work.