Loki Speaks gibberish
Looking for a fic, I think it was Loki/Steve, where Loki was in some kind of accident and had Aphasia so he only spoke gibberish, I think steve was a nurse or was Loki's therapist. I know steve ended up learning to speak the same way Loki did so they spoke gibberish together like a secret language.
It was a Human!au i think as well.