I notice the changes in languages I use frequently in the countries where they are spoken. We look at German TV shows from the 1970s and laugh at some of the expressions we hear, even though we were using them back then, too. Even more telling are East German shows from that era. They had a distinctive vocabulary all their own, although their media was 100% Party controlled, so it didn't reflect the spoken language completely.

My biggest awakening was the first time I visited Russia a little over 20 years ago. I had read Dostoyevsky and Gogol in college, but had never before been exposed to day-to-day post-Soviet era slang. I found myself struggling to understand people in the street who understood me perfectly. Some of them asked if I had had had a nice sleep these last 100 years, since my spoken Russian had never evolved to reflect 20th century slang. Since we never read any Soviet-era lit except for one short story of Vassily Aksyonov, we never got the chance to speak the living language. North Koreans experiencing the South for the first time will be subjected to a similar linguistic adjustment. Figure it's like someone from Mississippi, on his first trip outside of Mississippi, landing in London and hearing, "that wanker couldn't get his gear out of the boot, and couldn't even find the loo on his own."

Better yet, get National Lampoon's "European Vacation" and watch the scene where the Griswold family arrives at their hotel in London.

That is a great analogy with the German experience. This is what the article is about.

This is what I'm talking about:

Korean Language in North and South Korea: The Differences

https://www.daytranslations.com/blog/2018/05/korean-language-in-north-and-south-korea-the-differences-11414/

This article says, "As early as 2002, about 24,000 were already added to the South Korean lexicon." That would be from the time of the Korean conflict. I think the influx of new words has expanded greatly since that time due to the acceleration of international commerce, media and technology, but I may have, as an outsider, "exaggerated" the nature of the problem.

Don't the French, have some institutional body that regulates that language?

Spain has the Real Academia de la Lengua Española (Royal Academy of the Spanish Language), although the name is an arrogant misnomer, as several languages are spoken in Spain, of which Castilian ("Spanish" ) is just about the newest, along with Gallego, which is practically a northern dialect of Portuguese, spoken in the northwest. But the small enclaves where the old Celtic holds out, plus Euzkadi (The Basque Country) and Catalunya all speak languages that are older than "Spanish."

As for Korea, I'm betting that north of the 38th parallel, there are not many (if any) people who have ever heard the expression "Gangnam Style."

Yesterday I was thinking about the latest mol ka, secret (illegal) sex cameras involved in the current scandal with the male icon group, I don't know their name. Sel Ka, selfie camera picture taking. so gating, conflating introduction so gae ha da with dating. I hear new examples every day, once I figure out what they mean I usually forget them. Not enough watching of the daytime tv shows for young people.