Dominicans use pesos not dollars.
And inflation doesn't determine PPP of currency , forward rates do, normally. T
The peso actually appreciated in value by nearly 100% during a year of high inflation so that blows that theory. In a manipulated illiquid currency market like the DR peso, traditional economic theory goes out the window. With 24% DR investments you pays your money you takes your chances.
Maybe you have your US$ equivalent in a year plus 20%+ interest and then again maybe you have less because the peso is at 50:1 again.
To BOTC there is a current post on this topic with pages of discussion. Search. Looking at odd posts in the wrong sections is not a search.