r/IsekaiNonbiriNouka

Yes, they do call by a different name. “Gram”
Which is actually a sword of Siegfried.
Which makes sense considering it’s used to slay a wyvern.
But considering that it was a tool/ item literally given by God himself.
Hiraku doesn’t know that he has one of the blessed items from the good book.
The spear that is covered in the blood of Christ himself. And even various people like Adolf Hitler were actually obsessed with it.