Well, I'm not an expert in Latin by any stretch. And I've probably forgotten far more that I remember. But the way that sentence is constructed seems more like a transliteration using a robo-translator. So while the words map out to the same words in English, it's not the way I'd suspect a Roman - or somebody who is well acquainted with the Latin language - would have said it. I personally would have thought the sentence would have started with something like "Si vis" (if you want to), which is a fairly common construct.
Point taken there.
Now go ahead and try to encode that in an English sentence as purported to have been done above with the same meaning.
My guess is that if the message is real, any discrepancies with proper Latin grammar, etc., can be relatively safely attributed to the difficulty in creating an English sentence to properly fit.
But, who knows?
It is certainly interesting, and could very well be real. Or a simple coincidence. e.g. When you listen to any language backwards, at some point you will hear "messages". This happens in all languages. If you played with my "Satanic Music Detector", you will have heard this many times. One of my favourites that I found was in a Slayer song where they sing "666" but backwards it sounds like "kiss kiss kiss".
It would be interesting to know a bit more about whether the same sort of phenomena happens for the first letter/sound/phonem e in a word across a sentence.