I want to get Group Fitness certification that is Intanationally realized , so what do I need and where to take the course pls?

I want to have a Group Fitness certification ( Internationally accepted of couse) as I am a Zumba Instructor as well as I want to open a private Gym – So what do I have to do to register for a training course ? Whee is the training opendd in Asia if has pls?