It would seem I rushed with the answer, let me dig a bit deeper
Okay, I seem to have figured it out a bit, but unfortunately it is simply not working properly for the activity, while working correctly within the Orchestrator UI.
If you take this, save it as a CSV file (UTF-8) and upload it in Orchestrator UI, it will work correctly:
Reference;Priority;hello_in_russian@odata.type;hello_in_russian
1;Normal;#String;Привет
However, loading this CSV file to a Data Table in Studio and passing it to Orchestrator using the Bulk Add Queue Items returns this for me:
(an empty queue element).
I registered this particular issue in our bug tracker.
Lastly, I also feel like we shouldn’t force our users to name their columns like that. We will look into that too.