The etiquette nobody writes down.
Rice on the left, soup on the right. No smoking on a plane. The unspoken rules people expect you to already know: by country, by situation.

Category
Country
151 rules
All rules
Accept the refreshments at a business meeting
PhilippinesBusiness
Accept the second offer of food, not just the first
IndiaHome
Accept what's offered — don't keep refusing
PhilippinesHome
Address people by their title and surname
PhilippinesBusiness
Always queue, never cut in
United KingdomSocial
Always say "Bonjour" before anything else
FranceSocial
Arrive a few minutes early for a meeting
GermanyBusiness
Ask about shoes, and accept the tea when it's offered
United KingdomHome
Ask before you photograph anyone, and skip government buildings entirely
Saudi ArabiaTravel
Avoid black or white gift wrap
ThailandGifts
Avoid direct, blunt confrontation
PhilippinesBusiness
Avoid gift sets of four or nine
JapanGifts
Avoid leather and white-wrapped gifts
IndiaGifts
Avoid sets of four, knives, and clocks
KoreaGifts
Avoid white or black-and-white gift wrapping
PhilippinesGifts
Be direct and split the bill
GermanyDating
Be warm and family-oriented
GuamDating
Be warm and punctual, but not overly formal
MexicoDating
Bow and use two hands with seniors
KoreaBusiness
Bring a monetary gift (ika') if you attend a wake
GuamGifts
Bring a small gift when visiting someone's home
KoreaHome
Bring back omiyage after any trip
JapanGifts
Bring flowers — odd number, unwrapped, never red roses
GermanyHome
Bring food or something practical to a housewarming
PhilippinesGifts
Bring wine or flowers, never chrysanthemums or a black-wrapped gift
ItalyHome
Build rapport before getting to business
MexicoBusiness
Build the relationship before the business
PhilippinesBusiness
Buy from the wedding gift list if the couple has one
United KingdomGifts
Buy your round at the pub
United KingdomDining
Check before you shoot, and don't push past the inner sanctum
IndiaTravel
Check tattoo policy before visiting an onsen
JapanTravel
Confess feelings with a kokuhaku, not a slow fade
JapanDating
Court with gestures and patience
PhilippinesDating
Cover shoulders and knees before entering a temple
ThailandTravel
Cover up once you leave the beach
FranceTravel
Don't ask for parmesan on seafood pasta
ItalyDining
Don't bring wine, and don't arrive on time
FranceHome
Don't climb the pyramids — it's illegal, not just discouraged
MexicoTravel
Don't expect a kiss on the first date
FranceDating
Don't flip the whole fish over
ChinaDining
Don't Give Marigolds as a Casual Gift in Mexico
MexicoGifts
Don't litter on the beach — Rio enforces it with real fines
BrazilTravel
Don't mistake directness for rudeness
GermanySocial
Don't open a gift in front of the giver
KoreaGifts
Don't order a cappuccino after 11am
ItalyDining
Don't schedule business around Friday or prayer times
Saudi ArabiaBusiness
Don't sit down until you're shown your seat
ChinaBusiness
Don't sit down until your host tells you where
JapanHome
Don't sit on the Spanish Steps, or any monument steps
ItalyTravel
Don't take phone calls on trains or buses
JapanTravel
Don't tip
JapanDining
Don't touch someone's head or point with your feet
ThailandDating
Dress modestly and remove hats at church
PhilippinesTravel
Dress modestly and respectfully in public
PhilippinesSocial
Dress modestly, and don't initiate contact across genders
Saudi ArabiaSocial
Dress well even for a quick errand
ItalySocial
Eat and pass food with your right hand only
IndiaDining
Eat with the spoon, use the fork to push
ThailandDining
Eat with your hands at a kamayan feast
PhilippinesDining
Exchange business cards with two hands
JapanBusiness
Expect the man to pay, but offer to split
ChinaDating
Give flowers in odd numbers, unwrapped
GermanyGifts
Give gifts with both hands, open later
PhilippinesGifts
Give money or a gift at a wake (lamay)
PhilippinesGifts
Give the "mano po" to elders
PhilippinesSocial
Go for a drink, not a formal dinner
United KingdomDating
Go slow on public affection in Korea
KoreaDating
Greet elders with nginge'
GuamSocial
Greet elders with respect when you arrive and leave
PhilippinesHome
Greet friends with la bise, not a hug
FranceSocial
Greet locals warmly and avoid confrontations
PhilippinesTravel
Greet the most senior person first
IndiaBusiness
Greet the oldest person in the room first
VietnamSocial
Greet with a handshake or a single cheek kiss
MexicoSocial
Greet with a wai, matched to who you're greeting
ThailandSocial
Greet with namaste, and touch elders' feet
IndiaSocial
Hora Mexicana — Arriving Late to a Mexican Home Is Normal
MexicoHome
How Many Cheek Kisses, and Which Side First?
GlobalSocial
In Germany, Hold Eye Contact When You Toast (Prost)
GermanyDining
Involve (or at least acknowledge) the family
PhilippinesDating
Involve the family early in the relationship
IndiaDating
Keep dating private and modest in public
Saudi ArabiaDating
Keep the fork in your left hand, knife in your right — even for pizza
BrazilDining
Keep your hands on the table
FranceDining
Keep your hands visible, and don't rush off after eating
MexicoDining
Learn to hear the disagreement inside the politeness
United KingdomBusiness
Leave the yellow and pink subway seats empty
KoreaTravel
Let the eldest or the host eat first
PhilippinesDining
Let the host toast first, and clink lower
ChinaSocial
Let the man make the first move
ItalyDating
Let them lead the cheek kiss, and match the local count
BrazilSocial
Let your host offer food more than once
GuamDining
Manage public affection to match the setting
PhilippinesDating
Never criticize someone in front of others
ChinaSocial
Never give a clock as a gift
ChinaGifts
Never give chrysanthemums, and count your flowers
ItalyGifts
Never leave chopsticks standing upright in your rice
VietnamDining
Never point your feet at the altar or a Buddha statue
VietnamTravel
Never smoke on a commercial flight
GlobalTravel
Never speak ill of the monarchy, never step on money
ThailandTravel
Never stand chopsticks upright in rice
JapanDining
Never touch a latte stone, and keep your voice down
GuamTravel
Never touch someone's head, or point your feet at them
ThailandSocial
Never write a living person's name in red ink
KoreaSocial
Number 4 is unlucky, 7 is lucky
KoreaSocial
Open with small talk, not the agenda
GuamBusiness
Pass jeepney fare hand-to-hand, and say "para po" to stop
PhilippinesTravel
Place rice to the left of soup
KoreaDining
Present and receive business cards with both hands
VietnamBusiness
Present business cards with both hands
ChinaBusiness
Present your card with both hands, to the most senior person first
ThailandBusiness
Print a Portuguese translation on your business card, and don't step back
BrazilBusiness
Put bread directly on the tablecloth
FranceDining
Reciprocate favors with chenchule'
GuamSocial
Remove your shoes, and don't wander past where you're invited
PhilippinesHome
Respect Ruhezeit — quiet hours are enforced
GermanyTravel
Restaurant tipping percentage varies sharply by country
GlobalDining
Say "salamat" and linger after the meal
PhilippinesDining
Shake every hand, use titles and last names
ItalyBusiness
Shake hands in business settings, skip la bise
FranceBusiness
Shake your cup to signal you're done with the coffee
Saudi ArabiaDining
Show up around 20 minutes late — showing up on time can catch your host off guard
BrazilHome
Skip alcohol, pork, gold, and dog motifs entirely
Saudi ArabiaGifts
Skip chrysanthemums and even numbers when gifting flowers
FranceGifts
Skip knives, clocks, and handkerchiefs as gifts
VietnamGifts
Skip lilies and chrysanthemums, wrap it well
PhilippinesGifts
Skip purple wrapping and sharp objects when giving a gift
BrazilGifts
Skip white flowers, red ink, and shoes as gifts
KoreaGifts
Slurping noodles is polite, not rude
JapanDining
Smile often — it's the default register
PhilippinesSocial
Split the bill unless someone offers to pay
GlobalDating
Stand on the correct escalator side
JapanTravel
Stand right, walk left on Underground escalators
United KingdomTravel
Take off your shoes, and let your host seat you
Saudi ArabiaHome
Take off your shoes, wear the slippers you're given
ChinaHome
Take your shoes off entering any home
KoreaHome
Take your shoes off indoors
JapanSocial
Take your shoes off just outside the door
VietnamHome
Take your shoes off, and bring a small gift
GuamHome
Take your shoes off, and never step on the threshold
ThailandHome
Tip 15–20% for massage, salon, and spa services
GlobalSocial
Tip hotel housekeeping $2–5 per night, left daily
GlobalTravel
Turn away when drinking with elders
KoreaSocial
Use "po" and "opo" to show respect
PhilippinesSocial
Use a title or honorific, not a first name
KoreaSocial
Use the spoon in your right hand, fork in your left
PhilippinesDining
Use three sticks of incense, never a random number
ChinaTravel
Use your right hand for eating, greeting, and giving
Saudi ArabiaSocial
Wash before soaking, and keep your towel out of the water
JapanTravel
Weather is always safe small talk
United KingdomSocial
Wrapping matters as much as the gift
JapanGifts