Perhaps this should also accept
I am a youth ?
BEEP BOOP HELLO FELLOW HUMAN. I AM A YOUTH.
I agree with Rubin, that "I am a youth" should be accepted. In American courts, for example, they're called youthful offenders, not teenage offenders.
אתה נשמע מאוד בוגר לגילך.
Thanks for a new word :) What is the difference between בוגר and מבוגר if there's any?
Adult = מבוגר
Mature = בוגר
I suppose "young man" would be too confusing for Duo, but that's the definition for נער that I was taught.
I think that you should also be able to use the word adolescent here.