I think it started way back in Final Fantasy XI. Back then Tarutaru were based in Windurst, a nature/magic city full of cat girls and short people. It was filled with cheery upbeat music (https://www.youtube.com/watch?v=VnP16Ypf4l4) and a bunch of Ned Flanders type speech coming from the Tarutaru NPCs that made them come off as having speech impediments. One Tarutaru comes to mind, coughshantottocough, who was especially annoying with her rhymes. But god damn they could fart out some good magic damage.
But I must admit, XIV's versions are a bit less annoying overall.
