Unlike English, it's possible to read Czech without knowing the words (no tricks like "tomb"). If you omit accents, one would either have to know correct pronunciation or he will read it differently.
What you could do is to replace an accent with an ASCII character. Compare the name of town Český Těšín with its Polish equivalent Czeski Cieszyn (Č → Cz, ě → ie, š → sz). Actually, this is how we got here, 600 years ago Jan Hus (John the Goose) added diacritics to shorten a few diagrams in written language.
The difference between `s` and `š` is similar to `s` and `sh`. Can you omit `h` in Englis? Well, tecnically yes, but you canged the language. Same on you!
Yes. I'm also using my own layout on ErgoDox EZ, my languages are Czech (příšerně žlouťoučký kůň úpěl ďábelské ódy) and English. I'm also a (neo)vim user.
I found it hard to switch layouts, I'm using only one with layers. On first layer there are english letters, second layer there are accents (a → á) and some symbols where accent is missing (m → +). On third layer there are arrows on home row and functional keys. Shift without other key is `(`, on second layer `{`. There are some additional keys at the bottom and middle, they cover the rest of symbols. Outliers are mapped to start editor, browser, ctrl+c, ctrl+z, volume, mute, …
I really like having a single layout. I don't like that I'm no longer able to type on QWERTY without looking at keys. On my desktop, I'm 10 % faster, on any other computer I'm 90 % slower. Would I do it again? Probably yes.
I would say there is more than a cheating history and a single game that triggered Magnus. However, most of it has a possible explanation. Like, I would be very nervous if you put me in front of a camera at 19 years. Are these arguments together strong enough? Hard to judge.
chess.com suggests Hans cheated more than he admits. He did (much?) better in tournaments with zero delay. In a few consecutive tournaments, he made a lot of top engine moves, slightly above Magnus/Kasparov/Fisher at their best. He had a hard time explaining his lines in the interview after the game (with Firouzja I think).
There are a lot of possibilities, mainly if the cheater has help from someone outside who has information about the game. It's enough to transmit a signal in critical position that something is there.In past, player refused to take off his shoes. Other one has friends who sit in particular order. From other discussions
* a hair of defined length placed in a bowl or glass of water and vibrations at the resonant frequency of that hair would produce visible ripples around the hair.
* distant noise such as car horns honking, bass from a passing vehicle blasting dubstep, construction noise, etc.
* laser beam through the window visible only with particular contact lenses
* a bone-induction speaker or thumper (vibrating device) embedded in them or replacing a tooth
* thumpers that can be put inside the soles of shoes that would not be detectable with a regular metal detector
My impression is that the technology is there. If the incentives are high enough, someone can find the way.