No other two languages are as unalike as the English spoken by Americans and Britons, and countless sociological tomes and travel guides of the Edwardian period devoted a considerable number of pages detailing the differences. Not only did vocabulary vary, but the spelling, and most acutely, pronunciation of words immediately marked one as quintessentially English or quintessentially American. In her memoirs, Consuelo Vanderbilt Balsan mentioned her anxiety when she first moved to England, for she was expected to modulate her voice, to adopt the low-pitched, slightly muffled tones of her new English relations, and of course rid her speech of any Americanism. Since we have few recordings of speech from the late 19th century, and even fewer, if any, recordings of upper class voices, who knows what difficulties Americans faced regarding their speech when traveling abroad, but those wishing to take part in the transatlantic social whirl were schooled rigorously on the correct pronunciation of certain, mystifying English words.

A short list:

Pall Mall, the center of London’s club life, was pronounced “Pell Mell”

Surnames:
Beaconsfield, Beckonsfield;
Beauchamp, Beecham;
Belvoir, Beaver;
Cholmondeley, Chumley ;
Marjoribanks, Marchbanks;
Wemys, Weems ;
Hairstones, Hastings ;
Eyre, Air;
Geoffrey, Jeffrey ;
Colquhoun, Cohoon ;
Urquhart, Urhart or Urkurt;
Dyllwyn, Dillun ;
Waldegrave, Walgrave ;
Cockburn, Coburn ;
Mainwaring, Mannering;
Cowper, Cooper ;
Froude, Frood ;
Knollys, Knowles ;
Gower, Gor ;
Meux, Mews ;
Kerr, Car ;
McLeod, McCloud ;
Ruthven, Ri’ven;
St. John, Sin Jin;
St. Clair, Sinkler ;
Bourne, Burn.

For those traveling the opposite direction across the Atlantic, American words could be just as frightful:

Bedspread, counterpane;
Chore, odd job about the house done by a man;
Deck, pack of cards;
Dirt, earth or soil;
Elevator, lift;
Help, servant;
Lines, reins;
Parlor, drawing room;
Store, shop;
Take out, An American takes a lady “out” to dinner, while an Englishman takes her “in”;
First floor, ground floor