Firstly, the title.
In English, it is simply The Calculus Affair. In Dutch, however, Professor is no longer Professor Calculus, but Professor Sunflower. The Dutch version is called "The Sunflower Case."
In English, Nestor, frustrated with a lady who keeps mistaking Marlinspike Hall for the butchery, says "Fiddle-de-dee Madam!" In Dutch, however, he says, "Madam, walk to the moon!"
Captain Haddock's most famous exclamation is "Blistering barnacles and a thundering typhoon!" Kapitein Haddock's most used phrase is "A thousand bombs and grenades!"
Live long and prosper!