As of September 25th, 2018, it hasn't been fixed. I don't see an option to report it.
I'm assuming so. Word for word translations don't always work, and not all words in one language have a word in another language. In English intelligent is synonymous with smart although it is a stronger word, so inteligente is probobly the closest translation. I don't know for sure so don't take my word as scripture, but that's how I understand it.
I agree with T.J. Also to add that listo means smart when used with ser.
Mi hijo es listo. My son is smart.
Mi hijo está listo. My son is ready.
How can you know the difference between hijo and hijo (one of them is son and the other one is child)
Hijo is used for son (or your male child), hija is used for daughter (or your female child). If you are talking about a child that is not yours you use nino, or nina.
what if ur a 12 year old girl not a grown person or teen and have no children
Then you wouldn't say that??? Someone may tell you that, or you may say it in the future.