Hi@andybev,
Currently,FME handles attribute names with systems default encoding and doesn't have the same encoding application as the data values,which is why the values are displaying correctly but the header row is not.Our team is working hard on extending that functionality for the future (in either a future 2019 release or 2020) so that the attribute names will be handled correctly.The issue is FMEENGINE-56578.Thanks everyone for raising the issue and for your patience.
In the meantime,a potential workaround is to set your systems encoding on your computer to the desired encoding.You can find that your Region and Language settings on Windows,and you can set the Country or Region,Language,and in Administrative Language Settings,the language for non-Unicode programs,and see if that might work for you.
I have the same problem with excel column headers with greek characters not being read correctly when using an excel reader.I have submitted a case with a sample file to support@亚搏在线safe.