We added some codes in change 533, to fix bug 3526908, "Incomplete LCID list". However the list is still incomplete, as noted in comments to http://jira.pentaho.com/browse/MONDRIAN-973. For instance, we need code 0x0c0a (decimal 3082), for es-ES.
The definitive list is http://www.microsoft.com/resources/msdn/goglobal/default.mspx.
To fix this bug, add that list to org.olap4j.impl.LcidLocale.