Lol, you could have asked any Jamaican any of that. And Aki isn't only eaten for breakfast, though it is common for breakfast. My grandmother makes some mean Aki. Seems like you stayed out of the country for the most part. And we really only say "Ya mon" to the tourists...it honestly is played out as much as "Booyaka". More commonly used would be "ya" or something along the lines of "Unh mon", basically an affirming nod + "mon".