How young are you?

In my English class when I was around 10 years old, my teacher told us that the west they don't like the question about their age; so I remember about that until now. But for the east, it is normal to ask about the age.

The worse thing in English that not the same to French or Italian is the question to ask the age is "How old are you?", so there is the word old in the middle, and the west they don't like being old even their age is.

So English should change their question to "How young are you?", and then I will replied, "I am 26 years young" :D hah hah