I'm going to answer for Korea, although we're not there now.
What's the equivalent of our going to Spain & similar on package holidays where you are? What type of holidays do ordinary families have?
Holidays are really short here (most people get only 10 days a year and only 5 days in a row) so people take shorthaul trips mostly. These will usually be to the current "hot place" as it's known. These days, Danang in Vietnam seems to be the hot place. Lots of people also go to Cebu in the Philippines which is totally set up for Koreans. Many many Koreans won't eat any food except Korean food, they even bring instant noodles with them on holiday, and will often stay in Korean-only hostels or hotels.
People will also take vacations inside Korea, especially to Jeju which is an island off the south coast.
As people get more money and working patterns change, there are more people going to Europe.
What interests me is that so many people go on tours, even very young people. So you have my 20 year old student going to France and basically just doing a package tour that we would consider to be for pensioners. There is definitely a fear of the unknown for many people.
What about things considered traditionally British? Do other countries do Sunday dinner? On Sunday's or different days?
Nothing special on a Sunday. Maybe young, cool people go to Itaewon for brunch. Itaewon is the main 'foreigner' district, so it has lots of nice restaurants. There are also a lot of other local places that do 'brunch' but it's mostly horrible (spaghetti with an overly sweet sauce is not brunch...)
What about gap years? Again American shows seem to have youngsters going straight to uni from high school if they're going to go
Very few people do a gap year in order to travel or work. They usually go straight to university. Some study for an extra year if they didn't do well in their exams (it is extremely competitive to get into a good university.)
What are bank holidays like where you live? What do people do for them? Are they called public holidays or something else?
They're called 'red days' (or just public holidays). The main ones are Chuseok (thanksgiving) which is three days and Seollal (Lunar new year) which is also two-three days. We also get Christmas, Buddha's Birthday, Children's Day, Memorial Day and Hangeul Day, which is a day to celebrate the creation of the Korean alphabet.
On the big holidays (Chuseok and Seollal), people usually visit families in their home town so you get the huge traffic jams. Especially on Chuseok, people visit the ancestral grave and perform jesa, which is like rites for the dead. There is a certain order to place everything on the alter, according to colour and type of food etc. It is interesting and very solemn and serious. Seollal is a bit more light-hearted and people usually bow to their parents and other elders and then get money from them. There is a game people play called yut-nori, it's like Ludo kind of. Oh and they eat ddeok-guk, which is rice cake soup. And on that day, everyone turns one year older.
Other days are just like a normal weekend really. Christmas is a couples day and not religious at all, even for Christians.
Is "soccer mom" slang for sahm?
No soccer moms, but the tiger mum phenomenon is in full effect, especially in rich areas like Gangnam. I guess we'd just call them a 'Gangnam Mum'. The stuff they do to their kids is just so depressing, I'm talking 5 year olds being at school from 9-6 and then having tutoring at the weekends and evenings. Most kids go to the infamous hakwons or after schools and can be there until 10 or 11 at night, every night. Some of the mums are just insane, tbh. All they think about is their child's material success.
There is a phrase 'umchinah' which is short for 'umma chingu adeul' or 'mum's friend's son' to describe the kind of perfect child who is going to be a doctor, is a 6ft tall, always gets perfect grades, is a class representative etc. Because mum's are always saying 'oh why can't you be more like my friend's son, he's so perfect'.
What's childcare like where you are?
It's not bad. There are a lot of kindergartens, ours was right on the estate we lived on, so only had to walk 2 minutes to drop off. You can also get a helper for free (or very little, I have actually forgotten what it was like) for the first three months of your baby's life. It's very common to have this kind of helper afterwards too. A lot of middle class women quit their jobs when they have kids, although this is changing a lot these days. The mums at my school were horrified when they saw me back teaching when my daughter was 6 months old, and assumed my husband was some kind of abuser to send me back to work ha ha.
Do Korean families tend toward having cooked breakfasts of some description?
Breakfast is the same as every other meal. Usually rice, some kind of soup, a few side dishes and a main dish. It's hard to buy take out coffee before around 10AM, even though there are millions of coffee shops).