Can a non-English user do a simple test?
 

In game can you put an equippable item in slot 0,1 of your bags and copy-paste-run this line:

/script local _,_,link=string.find(GetContainerItemLink(0,1) or "","item:(%d+)") _,_,_,_,_,_,_,test=GetItemInfo(link) DEFAULT_CHAT_FRAME:AddMessage(test)

It should say the name of the equippable slot in English.

(It won't work for ranged or ammo items--it's bugged still)