Language and Greetings
As previously stated, the Dominican Republic is a Spanish-speaking country with its own Dominican Creole language (also known as Dominicanismos or Dominicanese). It is thus polite and proper etiquette to learn some conversational Spanish before leaving on your vacation or visit. Your Dominican counterparts would regard this as a respectful and gracious gesture.
Learning a few key phrases will also help you meet, greet, and address people in the Dominican Republic. When meeting someone in the Dominican Republic, both men and women should shake hands, though it is best to wait for the lady to offer her hand first. Following the handshake, a salutation such as "Buenos dias" (good day) or "Cómo está?" (formal "how are you?") or "Cómo estás?" (informal "how are you?", used among children or friends) should be used. Learning some conversational Spanish will also enable you to distinguish between formal and informal forms of address, particularly the use of 'usted,' so that you do not accidentally offend or appear disrespectful. It is also good manners to try to make a point of smiling and maintaining eye contact during introductions.
When addressing or introducing someone, it is polite to opt for a more formal title such as Senor (Mr.), Senora (Ma’am/Madam/Mrs), followed by the family name if it is known. Remember that family is a very important aspect of Dominican culture, and seniors are given the utmost respect. Therefore you should always make a point of showing a degree of undue respect to elders.