What was the language of the slaves on the Caribbean plantations? African
Language of the master
Arawak
Carib

In the English colonies Africans spoke an English-based Atlantic Creole, generally called plantation creole. Low Country Africans spoke an English-based creole that came to be called Gullah. Gullah is a language closely related to Krio a creole spoken in Sierra Leone.

Explanation: pretty much English. but id say African

what are local authorities doing to fix the problem

explanation:

you can talk about what you learned about them. and you can talk about what happened on you're journeys with them. and then you can put all of the thing you learned about them in you're diary.