Pierre i believe that you have done a mistake about the nationality of the girl by writting that she is Bulgarian.
I believe that she is Hungarian.
Because at the 0:27 of the video the translator speaks Hungarian.
She says the phrase ''Hány éves vagy?'' which means ''how old are you?''.
In Bulgarian language the same phrase is ''На колко години си?'' (Na kolko godini si?)

And a Bulgarian can’t be able speaks Hungarian if she lives in the country for more than 10 years ???

PW