Skellig does know how to hold a pen or pencil - he was able to write, just not very well, Before. And he knows the traditional 'modern English' alphabet using Latin script lettering. But to learn a completely new system, new sounds, new characters...this is going to prove somewhat difficult.

Even with his added abilities that have aided him along their travels so far.

Using the stick in hand, he attempts to copy the shape alongside hers. Having his hands no longer shake helps, and tracing the image is easy enough.