## About The Pull Request
There was a PR I wanted to make, but one of the features I wanted the
addition to have was for an affected mob to only speak aphasic, but
understand whatever languages they'd normally be able to understand.
This, in turn, required refactoring language holders to separately block
language speech and comprehension. This change, I decided, would be good
to split into its own PR.
## Why It's Good For The Game
Allows more fine-grained control over what languages an atom is blocked
from speaking or understanding. This will be useful for future PRs or
admin events.
## Changelog
no player-facing changes
aac161bce9