Yesssssss, so so so close to finishing my paper... I'll hand it in tomorrow morning! And then how banter shall thrive! There are posts I want to respond to like six pages back now.
And yet Helvetica is the correctly formed adjective derived from that name, i.e. "Scriptura Helvetica," the writing of Helvetia. The font takes its name from that country, which is what Teddy said.