Words the royal family do not use
Lounge: British folks usually refer to the front room of the house where a family gathers for down time as the living room or lounge. The royal family won't call it that, though. The proper name for this space is the drawing
room.
Refreshments: Refreshments is another no-no in the royal vocabulary. Refreshments are served at working-class and middle-class events — not to the upper classes. The royal family would refer to light snacks as food and drink.
Portion: When speaking about an amount of food to consume, members of the royal family don't use the word portion, but instead ask for a smaller or larger helping size — another posh turn of phrase.
Pardon: Perhaps due to centuries of people approaching them for a "royal pardon", which was historically forgiveness for a heinous crime of some sort, the royals now can't abide hearing the word pardon when someone is excusing themselves. No "pardon me" or "beg your pardon" — just "sorry" will do.