An easier way to get to speak Australian would be drinking Fosters. But then, it sounds like he may have been taking that path too.
Speaking a new language after these traumatic experiences is more common...though usually temporary...effect.
I know I growl & snarl when a dog humps my leg, but the effect wears off before too long.
In fact the time required to wear off is inversely proportional to how far the dog flies when I 'shake it off' with my foot.