We have a number of doors between rooms on which my partner would like to have traditional porcelain knobs instead of modern handles. Replacing the handles is not an issue, but these doors have (basic) mortice locking mechanisms inside. Having known the tubular locks in Canada that can be opened (unlatched) by turning the knob either way I know I'll be annoyed by the fact our doors won't open that way (depending on which hand I'll be using, etc).
I see no technical reason why mortice locks couldn't work this way, but I don't even really know what to search for. Can anyone help with that - if possible even by giving me some French search terms (given that's where I live)?
Replacing the mechanisms with tubular locks would be an option, but they'd have to be drop-in replacements that don't leave gaping holes in the side of the door, and they'll have to accept the knobs my wife already bought (which fit on the usual square metal bar that runs through the lock). Requirements that can be resumed as "the wife shouldn't be able to notice a difference" ;)
Thanks in advance!