I know the difference between the two, but when they throw either in with a language I've never heard of (there have been 2 or 3) then I'm going 50-50. Western Asia is an area I have no idea about, haven't met or heard people from there.
500. The earlier ones are pretty easy, you can judge from accents. Can't say I have any idea what some of the later ones are, I haven't been to Myanmar or Afghanistan.