It isn't only the UK and English that is affected, though. Every country in Europe that I have been in, and I have been in many, has fast food both as an acuality and as a word, sells cheap plastic toys to celebrate Halloween etc.
Just so you know, very few people in Scotland used the word "knickers" when I was a child, it was actually consider rather vulgar. Children wore pants, or underpants, ladies panties or briefs. A lot of men wrapped their shirt tails between their legs and did not wear underpants, those that did called them underpants.
We knew English people talked about knickers, just as they called their daughters "darling" in public, something no Scottish mother would have dreamed of doing. "Dear" was the usual affectionate term, or "love" .