Character consept

So. I have a character. Well, 2, but the one will only be doing this in the first book, due to in-story reasons, who only communicate in sign language. When I do their dialog. Do you think I should just indicate they are signing, then say something like :
X says, ETC.
But, since I indicated they are signing at the beginning, you should know there just signing now? Or, have it say :
X signs ETC.
With the fact that the chracter is signing all through the dialog?

A post was merged into an existing topic: Writing silent protagonists and characters