。
Deaf people can communicate using sign language.
Literal
Deaf-persons [topic-は] sign-language [with-で] conversation [subject-が] can-do.
聾者 (ろうしゃ) is the formal/medical term for deaf people. 手話 (しゅわ) is 'sign language.' 会話ができる uses the ~ことができる potential pattern with the noun form — literally 'conversation is possible.' A straightforward informational sentence with specialized vocabulary.