Yes. The use of these terms is considered etiquette.
It has always been considered poor etiquette.
yes
Actually no. It is considered bad etiquette and players can ask for sanctions against you in tournaments for abuse of general etiquette.
If the burial is private in Switzerland it considered proper etiquette to publish the obituary after the funeral. If the burial is to be made public, the proper etiquette is to publish an obituary a few days before the funeral.
Check-raising is a common and accepted strategy in poker, not considered bad etiquette. It is a strategic move used to build the pot and gain an advantage over opponents.
Common unspoken rules. For example: ALL CAPS IS CONSIDERED YELLING>
No
He is considered Russian because he was from the Siberia area of the Russian empire.
The Russian Bear is considered the national animal for the Russian Federation.
When dining in Russia, it is important to be aware of key aspects of Russian dining etiquette. This includes waiting to be seated, using utensils properly, keeping hands visible on the table, and toasting with eye contact. It is also customary to offer a small gift to the host and to wait for the host to begin eating before starting your meal.
Strangely enough- no. Etiquette is a set of rules for behavior developed in a given region- and they can vary from region to region. What is polite in one area may be very impolite in another.