Original: The '' human soap '' rumors may have originated from the bars of soap being marked with the initials RIF , which was interpreted by some as Reichs-Juden-Fett ( '' State Jewish Fat '' ) ; in German acronyms , '' i '' and '' j '' were often used interchangeably ( in German Blackletter , a k a Fraktur the difference is only in length ) .
Simplified: The '' human soap '' stories may have started with the bars of soap being marked with the initials RIF , which was interpreted by some as Reichs-Juden-Fett ( '' State Jewish Fat '' ) ; in German acronyms , '' i '' and '' j '' were often used for either letter .