There have been some recent complaints in the Google Maps Help forum from English speaking people who live in Israel. In short, Google seems to have recently changes the Israel data to show street and city names in Hebrew (עברית).
Here is one complaint:
I too am having the same problem, in Israel for a month and it worked perfectly in English till two days ago then poof it changed to Hebrew which makes it very difficult for us English speakers.
Yes, Google Maps in Israel was in English and now is in Hebrew. Here are pictures:
Do keep in mind, embedding maps, maps on mobile devices or via the API for Israel show basically nothing due to licensing rights. The only way to see this level of detail is accessing maps.google.com on your desktop. But that is an other complaint.
Forum discussions at Google Maps Help.
Update: This was a bug and is now fixed.