If you go with a driving school they will help you with the whole process included the exam (which is very easy) with little or no Spanish.
A lot easier than the process of getting all the legalization and certificates from the embassy..ect. This way you get to keep your USA driver license and also a DR license. Of course you need you Dominican cedula.
I agree that a driving school can help prepare someone for a license. BUT:
When did you get your license? Easy enough if you can speak Spanish well enough.
Things might have changed if it was not recently. My first DR license was a fake which I drove on and renewed until the computer system finally caught up to me and I had to "start over". That fake license worked just as well as my ''real" one. I had to get a DR license since California refused to renew my DR license and of course there is that pesky 90 day foreign license validity issue.
The previous location for Puerto Plata INTRANT had a small private room where the verbal test was responses to situations on a video.
That office moved to the center of Puerto Plata. I got help many years ago to some questions I did not quite understand. That is not going to happen today.
Now, the location of the exam in Puerto Plata is in a large room in full view of the main staff with responses to a rather long series of questions with multiple choice answers. Nobody is going to help you pass the test there and I suspect you will need to understand Spanish to a fair degree to pass that test.