I usually fallback to sh or sh-flavored bash, which is a limited but very available common denominator. babashka has been creeping into my scripts in places, and of I'll sometimes use emacs lisp in a script form (in a way where I partially load my config, giving me some emacs lisp sugar libraries for doing things)

edit: oil intrigues me the most, the author keeps making incremental improvements over the years and seems to be very vocal with nice ~opinions~ -- mostly I'm interested in using it with existing bash scripts for better feedback/debug abilities