sparklingsquirrel

Great, am happy that this is useful for you:)

It's nothing special, but you can connect ChatGPT with Google Sheets and Docs via an Extension (ChatGPT for Sheets and Docs).
Important learning: Copy everything you want to keep and insert it again as plain text. Sometimes everything reloads und your input might be gone.

I have the same problem and would also prefer English over German. I'm still on version 0.0.33 so I at least don't have the text below the icons on the bottom. I too haven't found an option to change the interface language in the app.
In the browser version there's a possibility to select the preferred interface language but after choosing English there it didn't change anything in Jerboa.