Mojibake is a Japanese-English dictionary program for Unix/Linux systems. It ranks the results, so the best matches come first.

(文字化け) Japanese jargon for any of "garbage", "changed", "ghost" or "disguised" characters or what is shown when Japanese characters are not displayed correctly (various black boxes or other nonsense characters). Here are some examples that look like mojibake: █ █ (You should see some black boxes.) There can also be white boxes: █ █ or ǶǶǶ. In Japan, these are sometimes called " TOFU"

Mojibake is the phenomenon of incorrect, unreadable characters (garbage characters) shown when computer software fails to render a text correctly according to its associated character encoding. It is a loanword from Japanese.