A problem with [[Template:circumfix]]
Fragment of a discussion from User talk:Rua
What I'm more curious about is why there is that first parameter to begin with. It seems redundant to the 2nd and 4th, which could presumably be used to reconstruct the "whole" circumfix from its two parts.
But since this is a rather specific template that not many languages need, I can't really judge the merit of how it was made to work. Maybe you should ask at the GP, so that those who actually work with this template can explain.
My guess is that the first parameter is necessary for autogenerating the category name, which mentions the circumfix. I'll get to posting in the Grease Pit now.