Since westerners do not use the lunar calendar, they don't celebrate Spring Festival. But in the west, the large Chinese communities in certain cities have always celebrated it, and in recent years, more and more local governments have been funding Spring Festival events which are attended by a lot of non-Chinese as well :)

Do you mean the Lunar New Year, right? I'm not sure but maybe Korea celebrates such festival, as well.

yes, it's a Chinese festival

Except China, Vietnam celebrates the Spring Festival, too.