How to change battle text speed for specific messages

[BuzzGaming57]

I'm need to change the battle text speed for specific messages for the game I'm working on. I also know about the method where you can change the battle text speed in the built in script for it, but that's not what I'm looking for. I'm looking for a way to change the speed for only specific messages. It doesn't matter if it's a script or something, I would really appreciate any help.