What the acronym WC actually stands for: you will be surprised
Restrooms are usually marked either with special signs with schematic images or with the WC signs. This abbreviation has long been an international one but few people are aware of its meaning.
The Mirror has published an interesting historical excursion into the 19th century to explore how the name came to be. Indeed, for a long time, the word "toilet" was not pronounced in aristocratic society as it was considered a sign of bad manners.
Historians suggested paying attention to the history of toilets and sewage. The word "toilet" appeared much later than the toilet design was invented inself. The British company of Thomas William Twyford (1849-1921) began to produce models with a flushable tank called "The Unitas" (unity, combination).
In 1883, it was Twyford who was one of the first to patent a design that combined a ceramic earthenware sink and a drain valve. The main customer of the novelty was the English Royal Court.
Before the advent of toilets, they were called "water closets". In the XIX century, the word "toilet" was not pronounced in polite society.
To avoid awkward situations and so that well-mannered ladies did not have to blush when asking about the location of a special room, restrooms began to be designated by the abbreviation WC, especially in public places.
The nineteenth century was a period of great innovation for modern toilets, and the achievements helped to significantly improve public health and hygiene.