The Japanese translation is Magic-Based armor.

 Espers/Phantom Beasts 

While I did not DELETE the term "esper," I did go and place in the alternative for "esper."  In the Japanese context, they're known as "Phantom Beasts" or even shorter "Genju."  There is an alternative (100%) translation available at this time that features the proper translation, and also includes bug fixes created for Ted Woolsey's translation (he never even attempted to fix them).

The fixes include, but are not limited to, Evade % now actually works, the vengeful Cayene bug is fixed, the item as a hat trick is fixed, etc.  These are obviously implemented to fix things like inbalances, as well as bugs that are considered to be "stupid mistakes."