I am assuming that you are asking the difference between 会and 能 when they both mean the ability of doing something. 会 I am able to do something 能 I can do something. The subtle difference would be 会is more passive, 能 is stronger in stressing the ability of the person himself/herself. As we are deeply influenced by Confucianism, we tend to use 会more than 能 when you are asking if one's able to do something or not? 你能吗？ could contain a subtle disdain or disrespect towards the person being questioned. however, it all depends on the tone you use. Essentially, they mean the same thing. And it always depends on the context that those two words being used. 能could also mean 'could I '... such as in 'could I have a Duvel please?' it has the same meaning as 可以 in this context

British English. Am I the only one here who finds London accent so romantic ? LOL Jokes aside. I personally believe that it is easier to learn American English while it takes more time and energy to learn an English accent. Americans, they don't speak English, I thought. They only speak American, don't they? I vote for English accent

Not really. Desmond Morris has done extensive research over body languages and gestures, the video he's filmed clearly shows that body language varied from place to place and also affected by culture . You might've mixed up body language with facial expression as facial expression is generally considered universal.