IIRC she speaks Swedish, English, French, and German. I donít know to what level for the German and French but given that Silvia is German Iím guessing that Victoriaís German is pretty good.
Still, it depends into which extent Silvia used German with her children. A Polish acquintance of mine is married to a Dutch man, with whom she has children (living in the Netherlands). If I am correct her children understand just a bit of Polish, according to their mother because she didn't use that much Polish during their upbringing.