[Here, Byleth paused, as if trying to pick his words with care.]
I'm assuming notes will be required, to jot down our observations. Are you... able to write? Whilst I'm able to read, my skill with the pen is... non-existent.
[In short, no one can read his handwriting, because he was never actually taught how to write. Jeralt taught him to read, assumed that would translate to writing, and it resulted in Byleth's handwriting being such a messy scrawl that it could be considered torture attempting to read whatever notes he made.]
no subject
[Here, Byleth paused, as if trying to pick his words with care.]
I'm assuming notes will be required, to jot down our observations. Are you... able to write? Whilst I'm able to read, my skill with the pen is... non-existent.
[In short, no one can read his handwriting, because he was never actually taught how to write. Jeralt taught him to read, assumed that would translate to writing, and it resulted in Byleth's handwriting being such a messy scrawl that it could be considered torture attempting to read whatever notes he made.]