Once you find the Rosetta Stone, bring it to Dr. Unne in Melmond in order to learn the Lufenish language. What I want to know is where Dr. Unne got a PC capable of running this software.
Once you find the SLAB, bring it to Dr. Unne in Melmond in order to learn the Lefeinish language. With this knowledge you can get the CHIME that opens the Mirage Tower.