(Seemingly in the UK kids start swearing at the age of 4! In the 1980s most children didn't start to swear until they were 13. (I don't think I swore until I was about 21).
They also swear more often nowadays, and they have lots of choice: There are over 70 different common swear words in the English language (some of which also vary from English-speaking country to country), 10 frequently used words account for over 80 percent of common swearing.
Of course I am far too polite to tell you what they are, but they include the "F" word, and sh1t (which isn't even a swear word in Germany). You can learn more here.)