Behavior is the preferred spelling in American English. Behaviour is preferred everywhere else. Other than the spelling, there is no difference between the two words. The spelling distinction extends to all derivatives.
navidad es compartir ayuda es para hoy
esteban yo soy
miguel yo no estoy
•have family meetings
•try to make go out with each other
•or do family activities
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Bon nuit, mon cherie would translate as - Good night, my darling.
It is a French expression you use when you want to tell someone to sleep tight, basically.