It looks like a transliteration. Seems like they are using Cuneiform syllables to represent English. Quote from the webiste:
"We take the letters from your message and transliterate by syllable, as nearly as we can, into cuneiform."
Re:Dumb Cuneiform
by sbierwagen on Saturday November 07, 2015 @08:04PM
(#10526916)
https://en.wikipedia.org/wiki/Transliteration
They're just mapping the english sounds into cuniform. It's not a translation.
You could pre-translate, but Gozer would probably still laugh at you because they use Old Persian cuneiform, not Sumerian. You might also risk your message exceeding 140 characters post-translation.
Re:Dumb Cuneiform
by benoliver999 on Sunday November 08, 2015 @08:23AM
(#10528418)
Cuneiform was used to write multiple languages, since it's basically a way to write syllables, so it's a decent choice for a project like this.
You are basically writing English, but using different symbols (like IPA I suppose).
Or in other words - is the translation legit? If I show it to the Sumerian god Gozer, will he laugh at me? I realise the translation is probably phonetic (i.e., written in cuneiform but would sound like English if Gozer read it).