I think google hides an additional mark in their own edits so the tool can perform an actual check in this case.

They would not detect any AI edit from other providers.

There are tools to remove these hidden “signatures” E.g. https://github.com/wiltodelta/remove-ai-watermarks

I’m not commenting on the ethics.

Maybe with Xpra you could do something like that

At some point, uppercase letters were written without accent in French. I’m unsure where this comes from, but I heard this was due to the limitations of printing presses, and then typewriters kept the convention.

In any case, the style is quite out of fashion today, but I know people who still write (handwriting and typing) without using accented uppercase letters.