Well, bao is a particular board game played in East Africa (and probably elsewhere). But because there are many "board games" in the English-speaking world, "board game" does not work very well as a translation for the Swahili word "bao." My preference would be to leave it untranslated bao if in the context of games.
bao [noun] - an African board game usually played by moving pebbles along two rows of holes. https://www.dictionary.com/browse/bao