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Adiós or Chau?
Everyone knows that "adiós" means "goodbye", but I also found the word "chau" that apparently is an informal alternative for saying "adiós". I've never heard this as a way of saying "goodbye" in Spanish before. My question is, which one is more commonly used? And where in the world is the word "chau" used?
One more thing, I've seen "chau" spelled as "chao". Which spelling is correct?
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