so i have it set to the default amount cuz i don't know how to add custom messages or even more if i got over 29 i get aquaculture.message30, etc. but even when i have it set at defulat i get aquaculture.message0 sometimes i think that a you fix not a me but if im wrong please lmk. also would love to add custom messages

see pic https://ibb.co/0ZpR8Lm

There is one of the messages that´s an error as a joke. All the messages is literally just jokes.
You can add additional messages, by increasing the number found in the config. And then adding additional localization strings in the AQ2 localization file, with a Resourcepack.

What version are you on?