Custom keybinds and variables?

herakleia

Is it possible in this game to bind keys to stuff like local Say texts and the like? In a favorite game I used to play, I would routinely set up the numeric keypad to locally say stuff like, "Have at thee, $target!" It adds a bit of light roleplay, and since I am a habitual player of point taking melee characters, sometimes helps the team as well.

If so, I'd like to know what the full syntax is for editing these on the fly in-game if that's possible, and any variables that are useful. Is there a guide to this anywhere?