Can deaf people speak?
The posts from this dummy user come from real users from the German-speaking community throughout the 15 year-long exchange on the forum.
Deaf people can speak. They learn spoken language. Of course, not all deaf people can, because it is not easy to learn. Some deaf people can speak better, some worse. But sign language is also a language. Most deaf people can speak it.
Sign language has a different grammatical structure than spoken language. But sign language is not international. Every language has its own sign language. Of course, individual signs can be similar.