The latest version of WorldScript II included with Mac OS 8.6 is 7.5.6. Multilingual Internet Access 1.0 installs WorldScript II v7.5.5. If you installed Multilingual Internet Access, but do not have a Language Kit installed, you do not need to update to WorldScript II v7.5.6.
For users who have installed a Language Kit, WorldScript II v7.5.6 addresses some minor formatting/printing issues in some third-party applications. If you install a Language Kit on a computer running Mac OS 8.6, be sure to install the Language Kit Updater. The Language Kit Updater is located in the CD Extras folder on your Mac OS 8.5 or 8.6 CD-ROM. For more information, see article 24799:
Language Kit Updater For Mac OS 8.5: Read Me.
To update WorldScript II to version 7.5.6, install the Mac OS 8.6 Update, or run the Mac OS 8.6 installer. Then perform a custom installation of WorldScript II by selecting the Add/Remove option in the Mac OS 8.6 Installer, under the International component.
Note: For iMac or Power Macintosh G3 (Blue and White) computers that shipped with Mac OS 8.5 or 8.5.1: If you have downloaded and installed the Mac OS 8.6 Update, and you perform a custom installation of Multilingual Internet Access from the Mac OS 8.5.x Installer, you must reinstall the Mac OS 8.6 update.
For more information, see article 60382:
Mac OS: Installing Older Mac OS Component After Updating System Software or Firmware.