Very interesting!
In German we have two different pronouns for addressing a person:
If the person seems not yet adult, we say "du"; but if the person seems to be adult, we mostly say "Sie" (exceptions for close friends, family members or some team colleages who we address with "du").
In English this is not possible - addressing someone always is with "you", as you know.

I've read that in Arabic language there are two pronouns to address people, but not for distinguishing older or younger or adult from not yet adult - but to distinguish gender: "you male" vs "you female".