A&C tests: Acknowledge Test_002 / Err_004 / Err_005 uses undefined or invariant locales to write Comment but uses a preferred locale (en-*) for the session.
Test_002: undefined in script leading to an invariant locale write: l.81: var addCommentResult = collector.AddComment( eventFields, localTestCase.OriginalComment );
Err_004: same: l. 131: var result = collector.AcknowledgeAlarm( eventFields, localTestCase.Comment );
Err_005: empty in script leading to invariant locale write: l. 60: var result = collector.AcknowledgeAlarm( eventFields, "", "" );

The server then updates the invariant locale but might still return the session preferred locale (en-*) of previous test which remains unchanged.

The third parameter of those function call should be "gServerCapabilities.DefaultLocaleId" to avoid this kind of issue.