Aidan wrote:

Kaiser?
Cheese?
Does anyone have any idea what he's on about?
Does he?

I'd thought the German word 'kaiser' was derived from 'Caesar'. Has he
confused "Caesar' and cheddar?

He has confused 'Kaiser' = big cheese, with 'Käse' = cheese.

I mean, it's only three letters different right?

That's over 50% which is enough for a pass in today's education system.