Homestuckers will know of quadrants and charms, but I'm not looking to use the quadrant system, that's been done. I'm thinking nations have their own system of terms for their horribly complicated relationships; separate words for "allied and in love", "allied but personal rivals", "official enemies but in love", "actually want each other dead", and so on. I'd love to see if anyone else wants to come up with something like that.
Ensemble; nations have their own romance system.