Specific keyboard keys stopped working

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Hi peeps
So yesterday I was playing fine and all when my Z, ESC & 2 (é) keys stopped working suddenly in game (azerty)
I was trying to type in chat in chat when it happened. I checked if i didn't switch by mistake to qwerty but nope, tried to reinstall keyboards drivers & nothing yet. Every other keys around these are fine so I find it very odd.

Im gonna buy another keyboard in a bit, see if it works, but do you guys have any ideas of what caused that or fix ? I'm suspecting a windows shortcut lock thingy at work here
Posting here in case there are similar cases (since =~keybinds)

Edit : Dead Keys in my case
For future peeps looking that up, might be a corrupted keyboard driver, a windows lock function, or the synaptic trackpad driver messing up