"I have become a woman."
Translation:Yo me he convertido en mujer.
Why is "me he hecho una mujer" not acceptable? I just googled this and found a website that says "volverse" is followed by an adjective and "convertirse" usually indicates a change to a thing rather than a person. Is this incorrect? http://www.elearnspanishlanguage.com/grammar/verb/tobecome.html
Yes, you're right. I would just say it's not implemented.
it is odd, because English become is not a direct translation so I would stick to convertirse and llegar a ser.
why? because if you say Me he convertido en una mujer it's open to a sex change, it could also mean I've turned into a woman. If you use volverse it is even more strong on that sense because it implies the meaning of turned into, i.e. there was no woman before.
Obviously the real meaning of Duolingo, with it's funny sentences is a mystery and I think it's a bit unfortunate sentence to choose for this verb. Nevertheless the standard sentece when a girl develops into a woman would be Te has hecho (toda) una mujer.
The changes in meaning are erased in a real conversation, so you could use convertir and volver, because the context will eliminate misunderstanding. However I would keep in mind the three variants