The official language in Tanzania is Swahili. You can hear English everywhere, but its dialect is very different from ours, so you can't do without a Swahili phrasebook with pronunciation.
Swahili is a Bantu language with many words borrowed from Arabic. An English-Swahili phrasebook will come in handy if you want to travel to the interior of the country and see how the ancient tribes live their lives here. In addition, a tourist who speaks the local language is treated more friendly and loyal.
Swahili is not an easy language to learn, so getting a Swahili phrasebook should be considered in advance. The following useful phrases in Swahili will help you get to grips with your new language more quickly.