This question is too open, so it wouldn't be possible to answer it even if I tried (italki has a very short limit on the amount of characters that can be written in answers -- only 2,000). What I can tell you, though, is that in the anime, when there is something written in Greek, it is usually misspelled, or grammatically wrong. For example, the sentence in the Sagittarius house (in the Sanctuary arc) was grammatically wrong; and the Greek-named Court House (in the Hades arc) was misspelled. :-)