mojibake
n.— «Mojibake is a word to describe unintelligible gibberish displayed on a screen or printed on a paper when a software fails to handle encodings or fonts in the data stream. Mojibake is spelled in Japanese as “文字化け” which literally means “ghost characters” or “disguised characters.” Here, a set of ideograms “文字” means “character(s)” and an ideogram “化” means “change(d),” “transform(ed),” “haunt(ed)” or “ghost.”» —“What Is Mojibake?” by Tomohiro Kubota Tomohiro Kubota Oct. 10, 2003. (source: Double-Tongued Dictionary)