Angels have their own language. It does not sound like an earth language. Some angels come from a higher planes than others. Angels try to help mankind. Angels are not large, they are light, tall and proportionate.
Angels come from the angel world to teach mankind to be more divine.
They can come to anybody. All of them have wings. When angels want to fly they spread their wings. They keep them folded when they do not want to fly. Angels wings are delicate, but strong at the same time, extremely beautiful.