Is that true , reading Noblesse et Royautés that Crown Prince Alexander knowledge pf the serbian Language is very bad?
True.
People often make fun of his Serbian either in newspapers or on Youtube. There are a lot of gaffes he made unintentionally which made people laugh.
Once he said in Serbian:
"Serbia should milk a cow and take it's place in European Union." Of course, as he wanted to say: "Serbia should try and take it's place in European Union." but he used similar words that have completely different meaning and made headlines.
One of other gaffes was:
"In my CALF beats Serbian heart." Of course he wanted to say: "In my body beats Serbian heart."
Once he was visiting Serbian town of Chachak when he adressed it's people in Serbian with:
"My dear Chechens." instead of "My dear Chachans" which looked like he was addressing Kisti and Durdzuks people from Chechnya, which are a Northeast Caucasian ethnic group and not Serbian citizens.
Again, one more time he made people laugh when he addressed Serbian athletes as:
"You are all our shampoos." instead of saying: "You are all our champions."
He now lives in Serbia for 20 years and still hasn't properly learned Serbian, neither he or his wife and that's why they are often target of newspapers and people when they make mistakes which when made have completely other meaning than the one intended.
Sometimes he get's even booed when he goes somewhere to make a speech in Serbian among ordinary people. It starts at about 20 seconds in the video.