The language is more conservative than most other Western European languages.
It is used here to show politeness.
Porque sÃ is something you might say when someone asks you a question with Â¿por quÃ©? It is the 10th most spoken language in the world.
Of course greetings are just the tip of the iceberg, but you have to start somewhere! The former is generally more common in Latin America, while the latter is more common in Spain, although either would probably be understood in both places.
It is spoken by around 1.
It is used in all Spanish-speaking countries, and can be used at all times of day, and in any context, either formal and informal.