Except it still is very far out.The Steam page for the official translation is already up. It probably isn't too far out.
In a
You must be registered to see the links
on the Devs CI-EN page he explains that: "OTAKU Plan will be in charge of localization. The localization will start once the Gehenna version is stable, so the work will not be released until much later."
He also says that "The amount of text in this work is very large", which means that it will take a long time to translate it with a certain standard.
Yes, auto translator programs can help, but then you would have to go over the whole transcript again, after the program is done, to proof read it and to make sure that every thing still works.
Again, a lot of work and it will only really start once the Devs consider the game Finished and Stable. So it will most likely still be a few months before we get to see it.