That sounds neat so far.
Could you possibly add a female voice as well? That way if the girls talk, it won't sound like they have a male voice.
Blockland doesn't really have genders, just high-pitched voices. If you really wanted to you could make a female voice pack.
Here is the progress so far on how packs will work:
The add-on is called ChatTaunt_Pack_Name.
Inside, there is a file called sounds.txt, and the sounds (preferably in wav format).
For every sound, you need to add a line to sounds.txt like so:
NEWSOUND file.wav This is what it says!
(There is a tab between NEWSOUND and file.wav, it's just BLF being dumb.)
I'm going to keep it this way most likely, so you can start working on packs now if you want to.