Yeah I'm from India here we have a folk tale about an ancient rishi (sage) who have helped a princess improve her stuttering by reciting a specific song called "Thiruchalal" written almost 2000yrs ago, after reciting this song for 47 days continuously that princess was able to talk fluently and giver commands confidentially, still to this day we believe this song will help in stuttering and it greatly improved mine in limiting it but not completely gone.