age vs generation in Korean
나이vs세대

나이age
The word "age" means how old a person is. In Korean, 나이 is used when you ask or talk about someone’s years, like a child, parent, or friend. You can use it in simple questions and answers in daily life.
When to use age
세대generation
The word "generation" means people of a similar age, or one family level such as grandparents, parents, and children. In Korean, 세대 can talk about family generations or different age groups in society. You will often see it when people compare older and younger people or describe a family living together.
When to use generationHow they differ
세대 means a group of people around the same time of birth, like parents’ generation or children’s generation. It is not one person’s age.