She still spelled it as someone who knows Slovene (Ljub....) So it doesn't really matter what the city would be spelled like in other languages. Remember she spelled Brussels in German form.
If there's a connection to WWII era Yugoslavia it's likely complicated. Yugoslavia was originally allied with the Axis powers in 1941 then declined transit through the country which pissed off Hitler so Germany,Italy,Hungary and Bulgaria carved it up as occupiers in retaliation. Then the Yugoslavian communist partisans under Tito joined the Russian allies fight to defeat the Axis. She could have been communist, she could have been anti-communist. Just like she could have been pro Israel, or she could have been anti-Israel if there is an Israeli connection in 1970 as many have theorized. When the test results of being born in pre WWII Nuremberg Nazi Germany first became public a lot of people thought she could have been Jewish, and was sent west to escape danger in Germany as a child. But she is H24 on the maternal side, this pretty much rules out being Jewish, since it is determined from the mother's side. However H24 can include Roma i.e. gypsies, and they also were in danger in Nazi Germany so that's more of a real possibility in my mind. But nothing can be completely ruled out in this case. She could have also had a German, or Axis member father loyal to the Nazis, and carried anti-Semitic sentiments her whole life. I never heard any follow up to this story, but it could make a lot of sense if true.
New leads in a famous unsolved case of a woman's death in Norway point to a notorious Geneva banker who funded terrorism and revered Hitler.
www.nzz.ch