The Official language of The Bahamas is English. No need for you to learn another language or to bring a translator.
The Bahamas does have a dialect. We may speak a little faster than the tourists, but all you have to do is ask us to slow down. It's not a problem.
It is easy to understand, and more than likely you won't even notice it. Most persons in the tourism industry speak slower and clearer so that you don't have to ask us to repeat ourselves.
