The Y in Spanish (in Spain and in the rest of locations where Spanish is spoken) doesn't sound like an English J or like a French J.
Here you have recorded sounds (for English and for Spanish):
http://www.uiowa.edu/~acadtech/phonetics/#
Try to hear first the Spanish Y (ficativa, and the symbol is like a j) and immediately the English J (afrricate, voiced) and you will notice that they are very different.
Lumia
http://onomastica.mailcatala.com