Where are animal names stored in the game files?

I'm following this tutorial to add new names to the randomizer. However, the files she shows only contain names for sims, cats, dogs, foxes, horses, familiars, servos, and Plopsy usernames. I would like to add more names for other things you can name, like rabbits, chickens, cows and llamas, mini sheep and goats, and the My First Pet pets. Maybe even add more names for kids' toys, book titles, etc. Does anyone know where to find those in the game files? It's my first time doing this kind of modding so I'm not super familiar with how to find this info, I've just been following the tutorial.

(Not sure if this is the best place to ask, I know S4S is more for CC than mods, but I don't know of any modding-specific forums)