I was invited to Ghana for the celebration of the 200-year anniversary of the abolition of the slave trade. The people are just gorgeous, very friendly and with a wonderful sense of humour. They'll be delighted if he learns even a little of the Tri language and welcoming wherever he goes, but he will have to beware people stopping him in the street for "sponsoring their football team". He'll stand out. Ghana is very poor and very traditional-not many people seemed to drink and beer is quite expensive; tell him to visit Elmina castle, it's terrifying. They are very devout Christians in the main, and the pop/rock music reflects that. Didn't come across any traditional music as you might think of it, but I was only there for four days.
That's all I can think of just now, except do make sure that his visa is in order, as otherwise when he arrives he will be expected to fork out US$1,000 on the spot. No joke, I was lucky enough to be travelling with people that could help, although my visa was supposed to be waiting for me when I got there...
hope he has a wonderful time.