When I lived in Boston, I taught English as a second language to adult students from around the world. On the last day, they threw a nice party. I was amazed they had learned enough English
Language Days at the United Nations seek
The Chinese language is one of the six official languages chosen by the United Nations, and UN Chinese Language Day
Body language is a type of nonverbal communication in which physical behaviors are used to express the information. The interpretations may vary from country to country, or culture to culture.
Just like spoken language, body language varies from culture to culture. The gesture for “OK” has different