Hi! I'm from Romania, and we use the term "strigoi" mostly for ghosts (and sometimes for ghosts in the physical form of animals). But in older dictionaries (in those before World War Two) you can also find it as a synonym for vampire (and Abraham Setrakianis an old man). Nowadays we have a more simple word for vampire in the Romanian language: "vampir". :)
At the same time, the sentence "Sabia mea fredoneaza de argint" shouted by Abraham has Romanian words in it but it doesn't make much sense in this form. "Sabia mea fredoneaza" can be translated "My sword sings". "De argint" means "made of silver". Put them in this order and you have "My sword sings made of silver". Maybe he wanted to say "My silver sword sings"? I don't know.
But don't get me wrong, I love this show. And hey, I have no right to criticize them as long as my foreign language skills are also questionable. :D
