Apart from manuals, also nonmanuals; such as head tilt or head shake have grammatical features in sign languages. They appear while asking questions or giving negation.
Some lip movements are seen while people sign. I know that they do this to ease the convention of the meaning for their hearing...
@OtavioMacedo Yeah, I was thinking about that; but "mother" is probably not a coincidence, but rather a group of cognate words across language-family boundaries. Or isn't it?
@Alenanno The question is pretty bad: you get the most out of it—more than I would have expected anyone to get out of it.
And the OP doesn't seem too interested in linguistics: she doesn't really care about the issues raised in your answer and the comments.