Translation:She does not eat cheese since she is a vegetarian.
I'm vegan too, and I've noticed that food products from Europe are usually only labeled "vegetarian," if they are vegan. I suspect the word "vegetarian" means something different to Americans than it does to non-Americans. For this reason I generally don't call myself vegan but rather say "I don't eat meat" or "I don't eat dairy." etc. as the need arises.