The Gbe languages (pronounced ) form a cluster of about twenty related languages stretching across the area between eastern Ghana and western Nigeria. The total number of speakers of Gbe languages is between four and eight million. The most widely spoken Gbe language is Ewe (10.3 million speakers in Ghana and Togo), followed by Fon (5 million, mainly in Benin). The Gbe languages were traditionally placed in the Kwa branch of the Niger–Congo languages, but more recently have been classified as Volta–Niger languages. They include five major dialect clusters: Ewe, Fon, Aja, Gen (Mina), and Phla–Pherá. Most of the Gbe peoples came from the east to their present dwelling-places in several migrations between the tenth and the fifteenth century. Some of the Phla–Pherá peoples however are thought to be the original inhabitants of the area who have intermingled with the Gbe immigrants, and the Gen people probably originate from the Ga-Adangbe people in Ghana. In the late eighteenth century, many speakers of Gbe were enslaved and transported to the New World: it is believed that Gbe languages played some role in the genesis of several Caribbean creole languages, especially Haitian Creole. Around 1840, German missionaries started linguistic research into the Gbe languages. In the first half of the twentieth century, the Africanist Diedrich Hermann Westermann was one of the most prolific contributors to the study of Gbe. The first internal classification of the Gbe languages was published in 1988 by H.B. Capo, followed by a comparative phonology in 1991. The Gbe languages are tonal, isolating languages and the basic word order is subject–verb–object. Languages Geography and demography The Gbe language area is bordered to the west and east by the Volta River in Ghana and the Weme River in Benin. The northern border is between 6 and 8 degrees latitude and the southern border is the Atlantic coast. The area is neighbored mainly by other Kwa languages, except for the east and north-east, where Yorùbá is spoken. To the west, Ga–Dangme, Guang and Akan are spoken. To the north, it is bordered by Adele, Aguna, Akpafu, Lolobi, and Yorùbá. Estimates of the total number of speakers of Gbe languages vary considerably. Capo (1988) gives a modest estimate of four million, while SIL's Ethnologue (15th edition, 2005) gives eight million. The most widely spoken Gbe languages are Ewe (Ghana and Togo) and Fon (Benin, eastern Togo) at four million and 3