I'm trying to add a Chinese translation to this mod, and I'm curious about: (1.20.1 Forge)
1.Where can I find these words ↓ in game? I can't find a screen that contains them, thus unable to check my work.

2.I can't find these words ↓ in the lang json. Are they editable?

All the translation strings starting with "MineMenu" is never shown in-game. They're all used for the Minecraft text-to-speech functionality.

The gui.delete translation string, is for the "Delete" button when deleting something from the Radial Menu.

Hope that answers your question! :)

thx for that. So I can't translate lines in Q2 right?

Unfortunately not atm. no.