Habla español en Cuba?
If you don't, you will run into some issues in Cuba… Why? The answer is very simple: Because the majority of people over in Cuba do not speak any English.
If you are not looking the same as they do, there will be the first tourist fee added to your bill. Then the second if you do not speak any Spanish…
But overall I have to say that life is still relatively cheap in Cuba. Most expensive part of Cuba so far was Havana (I only spent 2 weeks there so I have not seen the entire island).