Duala, which is known as Douala in French, is a Bantu language spoken in Cameroon by about 87,700 people.
Duala first appeared in writing in 1862 in a translation of the Bible. The orthography was reformed in 1932, and again in 1979 when a common alphabet for the languages of Cameroon (Alphabet Général des Langues Cameroun-aises) was created.
Duala has three tones: a high tone which is marked by by an acute accent; a low tone which is unmarked, and a falling-rising tone which marked by a caron (ˇ). These accents are not always written.
Information about the Duala language
http://www.studentsoftheworld.info/sites/divers/584.php
http://en.wikipedia.org/wiki/Duala_language
http://fr.dooh.org
Duala - French dictionary
http://philippe.litou.free.fr/duala/dico%20franco-duala.htm
Akan, Bambara, Bamum, Bemba, Chichewa, Duala, Ewe, Ewondo Ga, Ganda, Herero, Igbo, Kirundi, Kpelle, Lingala, Mende, Ndebele, Northern Sotho, OshiWambo, Shona, Southern Sotho, Swahili, Swati, Tsonga, Tswana, Tumbuka, Twi, Venda, Wolof, Xhosa, Yorùbá, Zulu