First, there should be a notice, or something like it. This is what my line of logic worked out on the issue of swearing, so I might have not thought through it completely. If you notice something wrong, etc, please post about it.
The issue of swearing and foul language is quite common in anime. I was thinking about this, and I have divided the issue of swearing into two types.
First, the taking of God's name in vain.
The taking of God's name in vain is very clearly condemned in the Bible(Exodus 20:7)
Second, use of swear words as parts of speech.
For those of you who didn't know, the word b---h means a female dog, although that's far from the current use. The word b-----d is a name for an illegitimate child. The word d--m means to condem someone/thing to hell, and we all know what f---k means.
Note: The meanings of some of these words have changed/shifted.
This is just what I concluded after thinking about it, so if I missed something, read the top again.
♪The sword is sharp, the spear is long.
The arrow swift, the gate is strong
The heart is bold, that looks on gold
The dwarves no more shall suffer wrong.♪