Is bum a swear word

Should I send family members a thank you card? how do you say "can I go to the washroom in french"? What nationality do your manners belong to? Is it OK to be stubborn to someone if you KNOW you are right? How do you use however in a formal letter? Who is Johnny on the spot named after? Is REALLY an adverb of manner? Which cultures are comfortable with interruptions? Are there any phrases in China that are considered rude? Is mother-in-law's a possessive singular? What does business etiquette mean? Is it rude to correct someone when they pronounce your name wrong? How do you transdress? What is nakupenda? What is the formal way to say goodbye? During what period were artists producing works in the grand manner or the great style? What does mittere mean? What does the phrase stir up a hornet's nest mean? What does it mean If you tell a guy you like him and he says he is flattered? What is the meaning of the saying 'people in glass house should not throw stones'?