Yep, nobody in Spain ever believes that I can't really speak good Spanish, because I sound like a native. I had a friend pronounce Greek words transliterated to Spanish, and he sounded like a native as well.
There are a few minute differences, like the "s" sound being a bit farther forward in Spanish, or the "rr" in Spanish being rolled twice (in Greek it's only rolled once), or Greek having a "z" sound (which Castillan accents don't have), but largely it's more or less identical.
There are a few minute differences, like the "s" sound being a bit farther forward in Spanish, or the "rr" in Spanish being rolled twice (in Greek it's only rolled once), or Greek having a "z" sound (which Castillan accents don't have), but largely it's more or less identical.