The SRD claims that both the Skeleton and the Zombie have the following mastery in languages:
Languages Understands the languages it spoke in life but can’t speak
I’ve always taken this as that the original creature that turned into the sekeleton or zombie, mastered a certain language and took this knowledge with them when they became an undead creature. However, when looking at the Specter, I noticed it said the following:
Languages Understands the languages it knew in life but can’t speak
Is this difference intentional? Does the skeleton or zombie explicitly need to have said something in the language it mastered, or this is just a small overlooked difference that I should ignore?
I suppose it’s a situation that rarely comes up, but it could be relevant when a mute creature becomes a zombie. Certain creatures can understand but not speak certain languages, so it could be relevant for those whether their zombified undead could understand such languages.
Does a zombie or skeleton explicitly need to have spoken in life, or is this an unintended difference?