I noticed that Moodle when written in Japanese is Muudoru, which when I pressed the "convert to Japanese characters" button on my Japanese system came out as "no-dollars" or "dollars-free," which is pronounced "mudoru." The "mu" is the mu of Zen Buddhism. It also means nirvahna or englistenment! Probably not appropriate but "no-bucks-education system" (mudoru kyouiku shisutemu) an easy way to remember the name.