I recently made my first conrete step towards preparing for the trip and signed up for an online Wolof language course (although I should be able to get by fairly well with English and French I thought I should try to make an effort). Maybe I'm being a bit harsh on myself as I've only had a quick click through the first module, but the only word I've managed to remember is the number 10, spelled Fukk and pronounced much as you'd expected.
Sadly the rest of the language does not sound like obscenities, so may be a little harder.