@Bram,
No.1 The Bible is by far the most translated and distributed.
2nd? The truth that leads to eternal life
--- according to Wikipedia link here:
http://en.wikipedia.org/wiki/Jehovah%27s_Witnesses_publications#The_Truth_That_Leads_to_Eternal_Life
"The Truth That Leads to Eternal Life was a Bible study textbook published in 1968 and revised in 1981 (now out of print).[19] The 1990 edition of the Guinness Book of Records included this book under its heading "Highest Printings". According to the Guinness Book, by May 1987 it had reached 106,486,735 copies, in 116 languages.[20]"
Wikipedia also lists others put up on this list:
The Bible:"... the Bible was available in 438 languages..."
Tao Te Ching- "...mostly to English, German, and French."
Dianetics- on their own website says 50 languages
Koran- Translation is considered corrupting the text so translation is not encouraged. Less then 10 listed on Wiki but no doubt more but not extensive.
Tirukkuṛaḷ- Wiki gives less then 20 listings of translations.
