I find that tongue doesn't work consistently enough in my case. Also it seems to activate more often when I use numpad enter instead of the one below backspace for some reason.
the tongue doesn’t work when gex is talking, but also there’s a bug where sometimes he’ll just refuse to open his mouth (to talk or tongue)
as a hacky workaround for this i made it so you can “force” the tongue to fire if you hit the enter key 5 times lol