When changing the key bindings the narrator narrates the current binding as  narrator.controls.bound = %s is bound to %s

The second parameter is replaced by  gui.narrate.button = %s button  where that parameter is replaced by the actual key/button name.

This yields to narrations like

Jump is bound to space button

Attack is bound to left click button

This is already weird in English (a key is not a button!), but in other languages using a translation for  gui.narrate.button e.g. in German "Schaltfläche" this is even weirder.

Proposal: Don't replace the second parameter of narrator.controls.bound by gui.narrate.button, just use the actual key/button name there.