What I expected to happen was...:
I expected to see something like "cubus glutinosus" or "cubus muci" in the inventory

What actually happened was...:
It just has the English "Slime block" in the inventory

Steps to Reproduce:
1. Create a world in Creative mode
2. Change language to Latin
3. Type keystroke for inventory (Mine's set to "E")
4. Find the green cube
5. hover over with the mouse to see the name

This bug makes the game confusing for players in the Vatican and in ancient Rome.