I'm leaving this here for me to do later.

Aquaculture add zero custom sounds, so not sure what you're on about?

Because you are simply reusing the sounds in vanilla, when a sound plays, the wrong subtitles displays on screen. I'm currently changing the sounds over to "aquaculture" sounds. This will have 2 effects:

1. The correct subtitle will display
2. The sounds can be customized with a resource pack.