>>>>>sagovornik - go-between
>>>>
>>>>Nope, that's the "potrcko" (the runabout, literally) or "posrednik" (middleman). Sagovornik is interlocutor in English - but nobody uses that word; I haven't heard it ever, just found it when I was checking. Sa=with, govoriti=speak, so, co-speaker, partner in conversation. Two people who talk are sagovornik to each other.
>>>
>>>Go-between is also an interlocutor. How about "Arbiter"?` (the interlocutor in a dispute)
>>
>>The person you're talking with, . Just talking, literally, with-speaker (yep, govornik means speaker, orator).
>
>Well I don't know. An interlocutor, to me, is someone who speaks to both parties, on their behalf(s). From the latin "to speak between" afaik.

No. It's just a person who takes part in a conversation. The old minstrel shows used to have a guy in the minstrel chorus line who sort of led the conversation. He would ask questions of the others, and they would reply with the joke. He was the interlocutor. I think he was usually the guy in the middle of the line.