I guess you play on Mac or Linux, right? If so, I had seen a similar issue and it's most likely related to the Windows font used by the game (Verdana AFAIR). Or it may be the haunting problem of the past related to character encoding on computers before Unicode came to save us from misery. If your native language uses any accented characters, you may remember such issues from the past, when opening files/web pages had this problem of mixing up accented characters with random trash.