Even people who speak the language of gestures can have the focus

Most deaf people to communicate on the same formal sign language. But in fact, there are many varieties of sign language, which, like the accent in the spoken language, can show where a person was born.

Where there is a large community of the deaf, sign language develops naturally, and those who can hear and speak normally use this language to communicate with their deaf relatives or friends. As a result of this dialogue and develop their own, understandable only to the initiated, language gestures. But such gestures - as a local phenomenon, with the result that they begin to associate with a particular region or population center.

Those people who do not have special education and sign language is nowhere not been trained, often use a hybrid form of sign language, borrowing characters from a plurality of regions. All this leads to accents - in essence, the same as what is rich usual speaking.

via factroom.ru