ROM Hack Where is dialogue located in romfs folder?

[enderer]

I'm trying to make a rom hack of Fantasy Life where the butterfly has no dialogue. I've extracted the romfs folder with GodMode9. Where would I find the dialogue located?
The only file I see is called "_file_archive" so I assume everything's in there.
I guess I'm asking: how can I find and edit dialogue from _file_archive (in a hex editor i assume)?

 

[Milozaki]

Is it a .fa file? If yes, go and extract it with Karameru from Kuriimu