Here's some maledicta from Hearst's Magazine, 1913.  How many can you decode?  We've translated them as follows:

The circle overlapping an asterisk, followed by three exclamation points, means "asshole."

The D with a period means "damn."

The lopsided M with its four strokes means the four-syllable "motherfucker."

The lopsided H with its long cross stroke is a very cross "Hell."

But what about the I and question mark?  We couldn't find a single list of swear words that included any beginning with I.  Yet the letter I is in itself a swear word.  "'I' is a curse: 'I' is the labeled 'I' of oppression and condemnation.  'I' feels itself superior to other 'I's" (Lily Splane, "Elegy for the 'I,'" Quantum Consciousness).