Today, right before i was about to contact someone for help, i desided to just yolo into it and test everything ingame. So i added an extra parent with one line into /goddamn/ wordswap, cleared the only other existing parent for the sake of clarity, saved, loaded, made sure FCS still says the line is not associated with any dialogue, loaded the game with this tiny mod, and to my surprise everything was working just fine with only my line in place of that particular wordswap in the dialogue!
So what was that? Why does FCS freaking out on what's practically working?