"Will it work against uoıʇdʎɹɔuǝ uɐıʃɐɹʇsn∀?"
Encryption is not necessary for Australian english. Even in plaintext it's indecipherable...
"Just this arvo I was havin' a durry on the dunny, sat there with me grundies around me ankles, when I clocked this great big redback. Me mouth went as dry as a dead dingo's donger, and me clacker shut faster than a possum up a gumtree!"