SLES12 will require a new fontconfig.properties for East Asian fonts to display correctly.
While we do not have a test system yet. We know that Java runtime will fall back to the default SLES fontconfig file if it can not find a specific one for SLES12. The font locations in the default file are really outdated and almost certainly not where fonts will be located in SLES12.
This is only an issue for 1.6.0 and earlier releases.