when creating a process definitions either in Modeler or in Designer, after deploying, the names of Processes, Tasks, FIelds are all showed in the Explorer as unreadable symbols, if we use non-English charcters there.
Setting -Dfile.encoding=UTF-8 in Tomcat8 service JVM options did the trick.
You don't have to set URIEncoding="UTF-8" for Tomcat 8 as it is said to be switched on by default.
PS as my question was banned from the original thread http://forums.activiti.org/content/problem-formproperty-enum-type-actviti-explorer-512, together with my whole account 😃 I am noting here, that Enums still don't work. The Modeler doesn't even have an ability for properly defining the Enums - it doesn't let enter id/name pair for each of the enum values. Please fix.