I'm pretty sure when ML came out they gave a pronunciation for it. I know they gave quite a few for all the stuff in Tokuno when Samurai Empire was released... I've always called them Koo Sids.... but I've heard them pronounced anything from Koo Sid He ... to Koo Shee, and a million things in between... it's always rather amusing when you get folk into a talking program like Discord or Ventrilo and hear how folk pronounce names of towns in game and other things...
The one that still gives me a chuckle are the people who pronounce Runes as "Ruins" ... and Mage-ery as Maj-ery.... and I always want to ask them if they are a Mage or a Maj...
But that's rather like asking anyone in the USA what they call a Pepsi... Cola, Soda, Soda Pop, Pop... there are 100 different names we give the liquid...