I did say that in English "Dominican" does not sound correct but in Spanish apparently "Dominicana" is ok.
Also, if I'm not mistaken your not a native English speaker right? So then how can you be a better judge about English than Mirador?
nothing worse then some moron native speaker (no, i am not referring to chip or mirador, just talking in general) who claims he KNOWS english better than foreigners. after years of studying english and taking exams i probably know more about grammar than 99% of native speakers - this is how you learn a foreign language at school. yes, natives speak and understand their language but they have no clue what is correct....
back to the topic: in polish it is either REPUBLIKA DOMINIKANY (doesn't need translating, does it?) or DOMINIKANA.