The official language of Martinique is French. However, Creole is spoken by all. English is used in tourist areas.
Payment currency and
The currency used in Martinique is the same as in metropolitan France: the Euro. Dollar, travelers checks and credit cards are accepted. Off-site checks are rarely accepted French and foreign checks are accepted. You will find some ATMs throughout the island.
The voltage available in Martinique is 220 volts 50Hz. The electrical standard in Martinique is identical to that of metropolitan France.
The tap water is drinkable. But for the person with the stomach which can be weakened by the change of diet, it is recommended use of bottled water.