 Each of the major revisions is associated with a significant year in Thai history, although in the case of the 1999 and 2011 editions, the actual publication date is a later year.The Royal Society publishes guidelines for spelling loanwords in Thai.In 2012, a proposed change brought about concerns and criticism among the public, when Professor Kanchana Naksakul, an RIT senior fellow, proposed the new spellings of Thai words borrowed from English.