Thanks to Pasquale Buonomo, DURF is now available in Esperanto! You can find it here :)

Other languages available besides English and Esperanto:

• Italian by Francesco Catenacci (can be downloaded on the main page) 
• French by Louis-Philippe Breton (can also be downloaded on the main page) 
• Spanish by Arturo Purroy
  
• German by Birger Lambrecht
• Portuguese (Brazilian) by Mikaela Morais Dias
• Portuguese (European) by Ad Lib Works
• Russian by Dmitry Pavlov
• Polish by Bernard Abramowicz
• Finnish by Kari Silvennoinen
• Chinese by Qi
• Czech by Krčmelound

Cheers!

Emiel