Sign Language in Eorzea

[wolfswift]

Hi guys!  Long time reader, first time poster.

 

I had a question I haven't been able to find an answer for and thought this'd be a good place to ask it.

 

I know of the Mok tribe that communicates to its secret widespread members whenever they get the chance to meet through ancient hand signals.    But are there any other examples or any proof of a sign language in the game outside of that? 

 

Thanks for your time!