I like the idea that something like this could be open for 3 hours in the evening local time. Like, you'd get totally different communities coming on at different times, and having completely separate experiences together. But some other people would bridge the gap.
While you're online, every hour some people would be forced to leave and some other people could join.
On QWERTZ, backtick ` is: a dead key, situated left of backspace, and it's in the "upper row", too.
So there the combo is actually Alt+Shift+´+Space, in need of two hands - it's very hard to imagine a worse default key combo choice for this task, compared to Alt+Tab. I'm glad you made it configurable.
Fun fact: one of the first public drafts for multi-line Strings in Java expected the delimiter to be ```, until I pointed out the issue as above to Brian Goetz at JAX in Mainz where he had presented said draft. My proudest professional moment.
Take away: If you deal with keyboard magic and ergonomics, spend a couple minutes to check your assumptions behind your defaults in the other big keyboard layouts.