Sorry Modak, if I confused you.
Yes the problem still exists. When I execute SWI1, it shows the workitem text in the language it was created in, irrespective of the logon Language. When I select and click 'Display Workflow Log' it shows everything in the Logon Language(even the header).
Same goes with ME23N - Workflow overview shows title(Header) text in the language it was created in until workflow Log button is clicked.
Hope it is clear now.