I mean, are you fooled by these websites?
Training corpuses (corpii?) have always had lies, propaganda, derangement, you name it.
Training corpuses (corpii?) have always had lies, propaganda, derangement, you name it.
The Latin plural of corpus is corpora. It gets used a lot in linguistics articles, perhaps other fields as well.
However given that in English we don't care eg about Latin cases, I don't think we should care all that much about Latin plurals. So corpuses is fine by me.
"Corpi" gets used as a hypercorrection, but it's deprecated in favor of the two previous.
"Corpii", as suggested above, is right out.
I often use corpora, because it's what's common enough. And I sometimes use nonsense plurals like octopodes just to be silly.
The reason I replied is because the OP appeared to be interested in the most accepted or used plurals for this word.