Sorry, at this time TimesTen only supports English names for database objects. I have not tried it but you could try creating a private synonym (with a name consisting only of ascii characters) for the table in Oracle DB and defining the cache group against that synonym instead. This is supported and may possibly work for tables with non-English names. This is only possible for AWT and SWT cache groups - it does not work for AUTOREFRESH cache groups.
thanks a lot