It's pleasantly surprising how well some Japanese know of Monty Python! The Holy Hand Grenade of Antioch got shout outs on Nico and the wikiwiki page for Warspite.
ithekro said: (Speculation) Bismarck must have been sunk before the reference made it the joke came out, so she's not clue why it be funny...or even mean anything.
Nah, it's probably a delayed reaction as with the John Cleese SS interrogator.
She doesn't have to, simply reading two words was enough to land a British translator in hospital. Of course, it could mean that Silver Bell's Bizmarck is illiterate...