Possible Clues:

• Official language of Tanzania
• Common language in East Africa
• Person from Zanzibar? His wail goes out
• Language was unusually hard to central Sicilians
• Major Bantu language widely used in E Africa
• Tongue is holding fruit up with half of lips
• Widespread language of East Africa
• Small complaint before one grasps hard African language
• 'Was confused with Healey, in a manner of speaking (7)'
• Linguistic source of "Jenga"