I believe to be one of your target demographics (international students, thick accent) and I would definitely pay for a service like yours. Focus on delivering

I believe to be one of your target demographics (international students, thick accent) and I would definitely pay for a service like yours. Focus on delivering a polished products that can deliver, I will try your product only once and if your product's quality convince me that there is an opportuntity to improve my speaking skills I will literally throw money at you.