Idiomatic Expressions

I am creating this page because idiomatic expressions in natlangs are often traditional and have little literal meaning. "Merci", in French, means "mercy"; "obrigado" in Portuguese or Spanish means "obliged".

I suggest a new one that I created in order to avoid making new words:

How old are you?

Talo kyo-duna lemes hani?

how much | ?.PRES.be.3pS | GEN.existense | you?

lit. How old is your existence