Just launch the game and im playing on a azerty keyboard and i can't put z as forward in the control, i tried with any other key and it works fine !

Looks like buttons, listed by mdelbusso, are hardcoded for some specific tasks.
For example, F is used to strike the match, that lights the lantern, when it's in player's hands.

This make the game impossible to play with an AZERTY keyboard.
As a french backer, I hope it will be fixed soon! big bug!

Try reassigning the keys manually [until alternative arrangements/patches are made] in ExternalGameActionSettings.xml that is in the game's save directory: "Users\*****\AppData\LocalLow\Ice-Pick Lodge\Pathologic 2" .

I'm having a similar problem. I use the arrow keys and while I can bind them to the movement controls it seems that they're also bound to the look controls at the same time. There are no look controls listed. Why you'd even need look controls in this day and age...

Anyway, yeah, the bindings are one area that needs some pretty urgent attention. So let's hope it gets sorted for everyone's benefit.

Good news from release notes of the newest patch (not on GOG yet): "all keys are fully rebindable now!".