First off I really am not sure if this is plot or setting. Anywho, I will do my best to explain the situation. So we have party A, that wants to negotiate with party B. Problem is a language barrier. Party C is somewhat tied politically to A, and also has an interpreter that can aid in the dialogue of A and B. Also Party C is part of the enemy fighting party B. After a brief exchange to get party A in to the building with the help of party C, there is a conflict of interest between an individual in Party B and Party C. That conflict being one that person in party C made a promise to the individual in party B to kill them next time they met. Question is would having this promise between the two individuals help to dissolve the rocky negotiation process between parties A and B, since parties A and C have political ties? Would fulfilling that promise between the two turn the negotiations into a fight between A and B? Thanks.
The answer to your question will boil down to the personalities involved. Will the feuding parties be mature enough to put their own differences aside and negotiate in good faith for the common good? If so, this negotiation will work. After all, the negotiation has nothing to do with the feud anyway. The negotiation is between party A and party B. Party C is only there to provide translation. If Party C is so focused on keeping the feud going that they can't look past it, the negotiations will fail unless you can come up with an out-of-the box solution you haven't thought of yet. Another person who can translate might be a good plan. Unless, of course, you (as a writer) want the negotiations to fall apart and send the story in another direction entirely. I'd say go away and turn as much of this on its head as you can. Do a lot of what-if game playing and see what you can change, or maybe see something you've overlooked. This is one of those story problems you should work out yourself, though, based on what you know of your characters and your world. That's part of the fun of writing. You've identified the problem. Now go and fix it!
So we have party A, that wants to negotiate with party B. Problem is a language barrier. Party C is somewhat tied politically to A, and also has an interpreter that can aid in the dialogue of A and B. If C is tied to A, why would B accept an interpreter from C?...Equates to a biased interpreter in B's eyes. Also Party C is part of the enemy fighting party B. After a brief exchange to get party A in to the building with the help of party C, there is a conflict of interest between an individual in Party B and Party C. That conflict being one that person in party C made a promise to the individual in party B to kill them next time they met. This sounds like a gang feud. [Let's assume it's something like the negotiations for the Good Friday Agreement that led to peace in Northern Ireland. Are the Irish republicans really going to include an assassin in their ranks who's committed to murdering the British foreign secretary? Are the security measures going to be lax enough?] So, the scenario is only going to work on a smaller scale. And why would two groups with a sufficiently common interest to feel the need to resolve their differences have a language barrier? The Welsh nationalists, for instance; they may speak Welsh as their first language, but they also speak English fluently.
It kinda would make sense both parties from B and C have a brief and rough history. B got captured by C where his pride and prowess were wounded and humiliated, and then forced to go back to their superiors and admit their failings and of an impending war. Also C made it very clear they were on a mission to clean house, on top of putting a death sentence on B's head. So there is a matter of one sides word being kept, and the other trying to keep their life and try to mend their wounded pride. As for Party A they are alien and do not speak English. So getting stuck at a gate arguing with a high alert military element due to being in a war that started a little over a year and a half prior, are kinda on edge already. So things have already started on fragile ground to begin with due to A and B unable to even understand one another. Hence C showing up with an alien that does speak both languages, and flares up an old thing between B and C in that respect. Seeing as they have a personal axe to grind. Pretty sure starting off on the wrong foot, on top of their less than ideal relation toward each other. It would not take too much before the two boil over considering the situation. Though one could say either party can be childish at times, but this is a matter of personal honor. Problem is their actions reflect back on their men.
