Though the national language is Greek, English is widely spoken throughout the islands. In general, the more touristy the island, the more English you'll find. But, it's fun to learn a few Greek words to drop into conversation. Start your day with a cheerful "kalimera!" (good morning) or "yasas" (hello). And "parakalo" (please and you're welcome) and "efharisto" (thank you) are always appreciated.