As a fan of Front Mission, I got this game as soon as it came out fully knowing that I was diving into a vast sea of feces and peanut butter. After six long hours of muttering to myself that it was just like Armored Core and receiving weird and worried looks from my sister, I finished the game, went to Cold Stone and demanded enough ice cream to give me diabetes.
This video unearthed those sad, bitter memories even then I was laughing with enjoyment then slowly gradually turned into head-between-knees sobbing. Why!? Why, Square!? Release this junk into the US, but not Front Mission 5!?
...Anyways, I think the term, Wanzer, is no more odd of a name than Gundam and other numerous terms Japanese use for walking armored vechicles. It was the same for me, when I first started Front Mission games. It's something to get used to though I think the best term so far I've seen would be "mech."