Eg. did Macron sing anthem of France or did Merkel or Scholz sing anthem of Germany? In Poland tried to sing Kaczyński in 2006 and Komorowski in 2010, but both sang out of tune and both made the same mistake in text ("póki my żyjemy" instead of "kiedy my żyjemy").
https://www.youtube.com/watch?v=DT_VI-RmdO8 here sings Kaczyński
https://www.youtube.com/watch?v=6oJ3bOcX2Vo here sings Komorowski