Can one etiquette rule describe a whole country?
No. Country information can be a starting point, but region, generation, setting, faith, profession and personal preference may change the answer.
What is the safest greeting?
A warm verbal greeting without initiating touch is a useful default until the other person or host indicates otherwise.
Should I copy what local people do?
Observe first, but do not copy sacred, ceremonial or identity-based practices without understanding and permission.
What if I make a mistake?
Stop, apologize briefly, correct the practical effect and avoid demanding reassurance.
Does this site provide country-specific legal advice?
No. Read current official travel advice and local law before travel.
Do the tools store my information?
The planning tools run locally in the browser and are not designed to send entries to the website.