Customize action names for notification e-mails

Hi,

I want to customize my actions names as described in the Configuration > Notification page :

For instance, here, I'd like to have "UPD" instead of "Nouveau suivi", to indicate that the ticket was updated.

I may have found an inelegant way to do this by duplicating templates, then replacing the ##ticket.action## by the actual action, which is not cool since I have to deal with too many templates.

Is it possible to customize this ?