You are nerfing the ability for AI's and cyborgs to understand languages by cleaning up code, AI's and cyborgs don't have univeral understand because they weren't meant to understand simple_animals / monkeys.

My issue isn't with you cleaning it up, it's with you nerfing an ability while doing so.  There is a reason different means of understandings are taken care of at different levels instead of everything at the /mob/say_understands level because different mob types have the ability to understand various other mobs.  If you are attempting to remove their ability to understand vox's language like in the thread in the suggestions forum, then you've gone a bit overboard and removed every other language as well.