English is Saint Lucia's official language, but most Saint Lucians speak Kwéyòl—a French-based Creole language—for informal conversations among themselves. Primarily a spoken language, Kwéyòl in its written form doesn't look at all like French.
A similar version of the Creole language, or patois, is spoken on nearby Dominica. Otherwise, the Saint Lucian Kwéyòl is quite different from that spoken in other Caribbean islands that have a French and African heritage, such as Haiti, Guadeloupe, and Martinique—or elsewhere, such as Louisiana, Mauritius, and Madagascar. The Kwéyòl spoken in Saint Lucia and Dominica is mostly unintelligible to people from those other locations—and vice versa.
Saint Lucia embraces its Creole heritage by devoting the month of October each year to celebrations that preserve and promote Creole culture, language, and traditions. In selected communities throughout the island, events and performances highlight Creole music, food, dance, theater, native costumes, church services, traditional games, folklore, native medicine—a little bit of everything, or tout bagay, as you say in Kwéyòl.
Creole Heritage Month culminates at the end of October with all-day events and activities on Jounen Kwéyòl Entenasyonnal, or International Creole Day, which is recognized by all countries that speak a version of the Creole language.