Seth was honestly just happy that knew at least some sign language, even if it was just the alphabet.

"Honestly I was surprised you knew anything at all, most don't really seem to bother learning any sign language, beyond the point of being able to recognize sign language when they see it. Personally I've learned it all the way but, well, for me it was kind of necessary being mute. SO knowing the alphabet is already a lot in my book."
Seth gave a small shrug.