Réveillon
Hello :D I'd like to know from native English speakers if the French word "Réveillon" is common used in your country to refer to the New Year's Eve, party or anything else related.

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No. The word is common in South America like Brazil, but not in USA.

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"Réveillon" - never!! In the UK it´s always New Year´s Eve except in Scotland where it is known as Hogmanay.

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I've personally never heard it used. I'm from America. I'm not sure about other English speaking countries, though.

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US: no.
"Revels" ("a lively party") is used occasionally and "revelling" is a fancy, uncommon way of saying "partying."  But I've never heard/read "reveillon."