I have used "Tango Romeo Alpha" instead of "Trasadingen". But when i give "Tange Romeo Alpha" most time (about 97%) reply was "Roger direct Trasadingen" (even foreign pilots Air China, Korean Air, Ryan Air)...
And if the pilot have a problem reading back "Trasadingen" my next message will be "direct Trasadingen Tango Romeo Alpha"...
cheers
Johannes