It's also harder, with more irrational spelling, and the British are much more comfortable with irony and sarcasm. Britain's a small country, and it's much easier for us to all share the same sense of humour.

Delivering irony and sarcasm successfully (like delivering jokes) is a question of culture; making an ironic remark with a particular facial expression might get you a laugh, or a punch in the face, depending how you judge it.

I've heard it said that a German joke is a very serious matter (I believe that is actually an example of a German joke). <dodges punch>

If he’s a foreigner in Great Britain, sure. Otherwise, if he’s in the States, it probably makes a lot more sense to focus on American English…

I would recommend ignoring this suggestion, as it is pompous and undeservedly smug Eurocenterism.