Etiquette, system of rules and conventions that regulate social and professional behavior. In any social unit there are accepted rules of behavior upheld and enforced by legal codes; there are also norms of behavior mandated by custom and enforced by group pressure. An offender faces no formal trial or sentence for breach of etiquette; the penalty lies in the disapproval of other members of the group. Regardless of its level of material culture, any highly stratified society will possess an etiquette in which every person knows the behavior expected from him toward others and from others toward himself.
Source: Encyclopædia Britannica
True, the word “Etiquette” clearly derives from the French language.
However, Etiquette itself is far older than the medieval kingdoms in Europe.
“The teachings of Ptahhotep” is widely considered the first book written around 2500 BC. Ptahhotep (which was in fact not a Pharaoh), compiled instructions and advice on how to behave in human relationships. The great philosopher Confucius in China emphasized in his philosophy and teachings morality, social relationships, justice and sincerity as early as 500 BC.
Etiquette originates neither in a country nor in a special social class! Rather it is a human trait which always has the sole purpose of making other people feel comfortable around ourselves.
Consider the feelings of others and you will be doing just fine.