Hi Vineetha Yadav…..
Yes there is a train the trainer accent course for accent not only in American accent but also in British and Australian accent.
Any accent you comes from a base acent known as the North Icelandic Accent. This accent is the mother of all accents. If you have a good expertise in this you can learn any other accent as it is compared to the mother tongue of all accents.
I will provide you the links to all this accents if you wish to know about them and if you are interested. Anyway you can also check
if you wish to learn more about them.
Vineetha, I hope I have been of help. If you wish to have any further assistance please feel free to contact me or revert back to me.
Have a great day.
Thank you for reverting back to me.