Symptoms

Issue:
When using a SharePoint sub site created in polish then creating a document library and enabling Document set. K2 is unable to determine that the document library has Document Set enabled.
 

Diagnoses

Diagnosis:
I created a sub site in polish after installing the polish language.
after creating the sub site, I created a Document library.
And on the library settings under the advanced settings I Enabled the ?Allow management of content types?.
I then selected the Add from existing site content types.
I then added Document Set
After this was done I appified the document Library
When I the execute the Copy Document Set By ID Method and entered the details for the Polish Document Library and pre the execute button I receive a Document Sets are not enabled for the eDocument Library name] error
 

Resolution

Resolution:
Code fix was sent to the client. The client indicated they will apply the code fix them self when it suites their schedule and selected to close the ticket.