The traditional Easter greeting and response is, in English, "Christ is risen!" and "He is risen indeed!" PeaceBang and I -- as real, talking people -- have been known to greet one another the same way in Greek and Slavonic.
Here's your chance to get in on the fun, in a number of languages.
There are also some wonderful liturgical tidbits. If I were ever to "go Eastern Orthodox" it would be at Easter.
Which for them is very late this year, even as it is very early in the West.