On US OS 9 + JA lang kit, all dialog titles (not the installer) will become garbled if localize to Japanese, even with the main app version changed to 14.Japan. See screenshots below. On real JA OS 9, everything is fine.
I think this is a dup of the generic window title bug.
bug 9449 for all platforms.
*** This bug has been marked as a duplicate of 36689 ***